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Darrell Boyd - Owner of Mister Sparky in Olympia, WA








Darrell Boyd - Owner of Mister Sparky of WA.

Darrell is a Master Electrician license holder here in WA State and has been in the electrical field for over 25 years. He is extremely passionate about the electrical field and serving the local community. Educating people through this blog is just one of the ways he enjoys reaching out and sharing his knowledge. Electrical Safety in the home and making sure each home Mister Sparky enters is safer then when they got there is truly a belief and standard by which he leads Mister Sparky. Born in Tacoma, WA and raised in Olympia He loves the Greater Puget Sound Area and all it offers. Beyond electrical and Mister Sparky Darrell is also a devoted husband and father of 2 amazing children Brett & Kaitlyn. When there is a spare minute you may find him watching and following his favorite sports teams The Seattle Mariners & The Seattle Seahawks or quite possibly on a quiet river fishing for trout and enjoying this great state. If you have a question or topic you would like to have Darrell write about please feel to reach out to him or contact him anytime at




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Why Do My Lights Flicker? Electrical Contractor Explains!


Why Do My Lights Flicker?


Mister SparkySometimes there can be nothing more annoying than having your lights flicker or dim throughout the day or night. What’s causing them to flicker and or dim may not be such an easy answer. However, Here are a couple of questions you want to ask or observe first to get to a possible resolution.


Questions to Answer

1.)  When do my lights flicker? Only when a large appliance kicks on such as a heat pump or A/C unit or do they flicker any time of day or night without anything kicking on and or running. Try as best you can to observe what you have on and if it’s related to you’re A/C or Heat Pump kicking on.

2.)  Is it all the lights that are currently on in the house that seems to flicker or the same light or sets of lights that always flicker? Again, try to notice and make note of which lights, or is it all lights that are on when the flicker occurs.

3.)    How often does the flicker occur? Again, try to make note of the same things as above.


Let’s take a look at each situation one by one and why this may be occurring.

Same Light or Lights Flicker in the same general area and NOT throughout the entire home:

This problem can occur from simply having bad light bulbs to a bad connection between the light bulb and the light fixture socket to more complex troubleshooting issues like a loose wire in that particular circuit. A complete circuit diagnosis should be performed in this case to find the loose hot or neutral conductor causing the issue. These can be complex troubleshooting issues for the average homeowner as a single circuit in your home may have 30-50 connections to inspect and evaluate. The loose connection could be in a receptacle, a switch, a light, a j-box, or at the main electrical panel.  Loose connections are a serious issue and should be addressed as soon as possible.

Lights throughout the house and or nearly half of the Lights in the house Flicker:

If you are noticing random lights flickering and or sometimes nearly dimming and it’s throughout the house or a large part of the house and you are sure it’s not a large appliance kicking on causing the problem then make sure you have an electrician look at your main electrical service. If it’s not the same circuit always flickering it’s a sign that you could have loose service conductors in your main electrical panel or in your meter base. Again, this could be a very serious issue so contact your local electrician asap to address this issue for you. Your service conductors heat up and cool down with use all day every day 24 hrs a day 7 days a week. Over time this can cause the service conductors to loosen up and as they loosen up they create even more heat. Eventually this can cause the service conductors to burn up lugs on your main breaker, or the service conductors themselves to burn up, to even more serious issues. The key is to put an electrician’s eye on this for you and in the future make sure you have an electrical maintenance plan in place to help prevent this issue from ever occurring.      

Lights Flicker When a Large Appliance (Outdoor A/C or Heat Pump) kick on:

If your lights flicker every time for that split second when your outdoor A/C unit or Heat Pump kicks on and you’re fairly certain you have the flicker tied to that then here is what we have found. First off, it’s a common problem with large outdoor units to cause this. Why? They can draw up to 100+ Amps for that millisecond that they start up (otherwise known as locked rotor amps) most homes only have a 200Amp main electrical service so imagine needing half of your homes electrical power just to start that outdoor unit. Locked Rotor Amps by definition is the amount of electrical energy required to start the motor. This required energy is much greater than the Full Load Amps or Running Amps because of the required energy needed to not only start the motor but provide this transferred power to the outdoor unit’s motor to operate the designed work function. Once it’s up and running the require energy or amp draw goes way down. Again, all this occurs in milliseconds upon starting. Ok, let’s get past the technical stuff….. what can you do about it? Here is the order in which I would go about resolving this problem.

a.)   Contact your local electrician and or (the person who wired your outdoor unit if known) and just make sure they have the outdoor unit wired to the max ampacity and that the wire size and fusing is correct and all connections are tight. Have them look in the main electrical panel and if necessary the meter base to make sure all electrical connections are tight and that we don’t have loose service conductors.  It’s always good to just make sure the basics are right to begin with. If all that is good then my next step is….. 

b.)   Contact your local HVAC contractor or again (the person who installed it, if known) and see if they have a soft start kit that they can install on the outdoor unit. This doesn’t always work but it can definitely help as it will try and lessen the large amount of current required all at once to start that motor. You may already have one on the outdoor unit as a lot of the newer models these days have them however it’s worth the call to at least ask regarding your particular unit. If you have a soft start kit and you electrical checks out ok then here is the likely culprit. 

c.)   If all the above is good and you are still experiencing light flicker throughout the home when the outdoor unit kicks on then the problem probably lies between your meter base and the transformer that feeds your home power. The wire size feeding your home may be too small for your homes load and or more likely the transformer feeding your home may be too small. Contact your local utility company to look into this for you. Most will look into this at no charge to make sure you are getting quality power to your home.

Feel free to leave any comments and to hit our G+1 button at the top of this article if you thought this was helpful. Have other topics you would like information on? Let us know, we enjoy providing that little extra help that goes a long ways!


My down lights flicker for about 5 seconds every night at exactly 10pm and then 11pm. Not every light. Do we know what it might be? 
Posted @ Tuesday, January 22, 2013 2:54 AM by Chris
Chris my recessed lights in living room do the same thing at about 10:30 they are led bulbs on a dimmer switch all 6 do it simultaneously. What may be the problem?
Posted @ Thursday, January 24, 2013 10:51 PM by Robert McNitt
Lights flicker throughout the house when Washer is on.Had it looked at,could not find anything in the panel box
Posted @ Sunday, March 31, 2013 9:17 PM by Leighton McCrary
Everytime the ac turns on it clicks and the light flickers one time.When I turn on the light in one room the light flicks none stop so I just leave it off.
Posted @ Wednesday, May 01, 2013 12:47 PM by Juanita Arambula
Our lights flicker (get brighter than normal) all over the house, all night long whenever they're on. Its been in the last few months and seems to get worse. We had the PUD out and they said all was good on their end. Then we had electrician over who thoroughly went thru the panel and made some tightening adjustments and it is still the same? Thanks for your help...
Posted @ Friday, May 10, 2013 9:57 PM by Doug
We had some of these flickering problems at our real office that were finally resolved by the building owner bringing in another "leg" of power. But now I am having similar problems at my home office. It seemed to start in the office upstairs but now all the lights in the house flicker from time-to-time and I can't seem to locate the problem. Why would it get worse and flair up all of a sudden? I haven't changed anything or added any electrical devices.
Posted @ Sunday, May 26, 2013 10:18 PM by George Mulak
My recessed led lights in the den just start blinking crazily like you are at a disco nightclub! What do you think the problem is?
Posted @ Tuesday, June 04, 2013 7:39 PM by Jimmy
I have a problem. Yesterday, which would have been the 13th of June 2013, the electricity all of a sudden got dim and would kind of flicker faintly in all the rooms of the double wide trailer house except for the living room and a bedroom that is right next to the living room. The power in both of those rooms seem to not have any problems at all. It is so bad that my fridge is starting to thaw!!!. Please, I need any assistance ASAP! Thank you very much for your help.
Posted @ Friday, June 14, 2013 10:20 PM by James Dillon
We are renavating an older home and have replaced most of the old wiring but were advised that a lot of the old wiring looked great and no need to replace it. We now have lights flickering all the time. I was just typing this message when one of the two refrigerators in our home came on and the lights flickered all over the house. Any advise??
Posted @ Sunday, June 30, 2013 4:34 AM by Brenda Jackson
The flicker could be from either a loose wiring connection or an intermittent load elsewhere in the building. While a loose wire at the breaker could be causing the problem, it could as likely be at a switch or any intervening junction box between the circuit breaker and the lights in question.
Posted @ Tuesday, July 30, 2013 10:04 AM by Lahav Group
Tieing 3 different neutral wires together from 3 different circuit breakers will this cause lites to dim. When i plug a hair dryer into the outlets the lites flicker and then when i turn it on first spped the lite gets a little brighter 2nd speed a little more brighter and on high speed the lites reach their full brightness. Do you think bundling neutral wires together in old panel box can be the problem. thx
Posted @ Thursday, August 15, 2013 12:05 PM by wayne shipp
Wayne: You can have 3 same size neutrals under the same neutral bar screw hole. You cannot mix them with grounds or different size wire under the same screw. Some panels only want 2 of same size under each screw. 
You should never tie 2 circuits neutrals together. They must stay circuit independent along with it's ground and black hot wire. 
Each circuit on it's own.
Posted @ Friday, August 16, 2013 10:22 PM by JB
Wayne, Please allow me to clarify JB a bit as he was maybe a little confusing in his explanation. You do NOT want 3 neutral wires under the same lug on any neutral bar in any electrical panel. The electrical code states clearly that you can have only one neutral under any one lug. The reason being that that your neutral can carry current and having 2 or more under the same lug can cause an air gap or space and therefore cause an arc which will lead to heat which will lead to alot more expansion and contraction of that conductor causing anything from light flickering to a lost neutral. You want one neutral under one lug so you can have equal and tight pressure on that conductor. With the bare copper ground wires you don't have current flowing through them therefore you can usually twist them together and put a couple under one lug. You wont have the heat or expansion and contraction from them as you would the neutral conductor. I hope that helps and please consult a local electrician to make these repairs for you. These can be very costly repairs down the road if not taken care of asap. To You and Your Homes Safety!  
Darrell R Boyd
Posted @ Tuesday, August 20, 2013 5:02 PM by Darrell Boyd
Lights flickering with LED lamps.... I just want to address some of the comments regarding lights flickering with LED lamps. LED lamps are great lamps and a great step in improving the energy efficiency of your home. Alot of these lamps say they are dimmable and to a point alot of them are. Some of the LED lamp flickering can be from not using the correct dimmer. Make sure you are using a LED approved dimmer and that should really help cut down on the disco lighting your LED's are producing! If they are flickering alot and they are not on a dimmer then you may have anything from bad lamps, poor quality lamps, loose electrical connections, double tapped neutrals in the electrical panel, to a bad switch. Please have a qualified electrician evaluate that for you so you too can remove the disco light show from your home as well. To you and your homes safety - Darrell R Boyd
Posted @ Tuesday, August 20, 2013 5:28 PM by Darrell Boyd
Last December, we had a new York furnace installed. It worked very well and we have had no lights dim when it activates. In June of this year, we had a capacitor and contactor replaced on an old Comfortmaker AC unit. We began to notice the house lights dim when the AC compressor and fan started up. Just last week we had the old AC unit replaced with a new York AC unit. However, the dimming houselights still happen when the AC unit compressor starts up. Any ideas?
Posted @ Sunday, September 01, 2013 10:36 PM by Hank
this same set of lights in my living room flickers very annoyingly and i tried to solve the problem by buying a new box of bulbs, had it replaced, and guess what it wasn't the problem. i raged so hard i think i broke a chair
Posted @ Saturday, September 28, 2013 1:52 AM by some guy
my tv and lights blink off and on in a certain section of my home, not the entire house. I live in a condo and asked my upstairs neighbor if she had any issues. she did not. do I need an electrician or the electric company? HELP, PLEASE! 
Posted @ Sunday, September 29, 2013 10:00 AM by linda
We had this problem this weekend. We called our power company. They came out and found that one of our 120 lines coming into the house was bad and the neutral was bad. It was an equipment failure on their part. Thank goodness for surge protectors. When they brought it all back up, the surge protectors absorbed the surge and protected our expensive things. Now we have to replace the surge protectors. Better that than replacing TVs and computers.
Posted @ Monday, October 07, 2013 8:22 AM by Tammy
outlet in my kitchen has a night on 24/7 why does the night light flicker all day long.
Posted @ Saturday, October 12, 2013 8:24 PM by tony del percio
This is interesting! I enjoyed reading your great post.Thanks for the valuable information and insights you have shared here.
Posted @ Friday, October 18, 2013 9:05 AM by Leather Repairs Manchester
My lights started flickering about 2 weeks ago and we realized that the same thing had happened last year. We had an electrician come out, but he found nothing wrong. Its only one side of the house and no major appliances are on when this happens. In fact the only thing we've noticed is that it's around the same time as last year. Any suggestions would be greatly appreciated
Posted @ Wednesday, November 06, 2013 8:40 AM by Maria
We live in an old house with old wiring. We have 2 lights in our bathroom on the same switch. They will flicker and then stop as something is apparently warming up and expanding. Would the switch be the first place to consider? There are only two wires coming into it. Old wires. But no other lights in the house do this. I'm not sure how to replace the switch, It's done this for several yrs. and used to pop light bulbs. We have two 60watt bulbs on this switch which is a cheap one put in 25+ yrs. ago with a small remodel. small wires are stuck into the back and are wire nutted to the old wires. Hoping it's the switch. What's your best idea on where to start?
Posted @ Saturday, November 09, 2013 8:52 AM by Steve Hall
I had a new furnace installed, and the next day one of my bedrooms and my dinning room now has no electrical power. Could the installation of the new furnace and them wiring the furnace switch to the new furnace have caused a problem in these two rooms?
Posted @ Saturday, December 07, 2013 10:31 AM by Elma Jackson
Posted @ Wednesday, December 11, 2013 5:53 PM by
since changing two light/ceiling fan fixtures(kitchen and bedroom)whenever the washer/dryer is running the lights thruout the house flicker and dim the entire time the laundry is going? is this an electrical fire hazzard? Our neighbor an electrician checked it out tightened a few things and found no other problem. Since tightening has changed nothing wondering what it could be.
Posted @ Wednesday, December 11, 2013 6:55 PM by nancy
Our lights flicker in same half of house a lot , and loose power for a second . Neighbor next door has same problem except her power sometimes goes out for few minutes ..Detroit Edison came out and said we are not on same line ..they cannot figure out problem . Any ideas ?
Posted @ Monday, January 13, 2014 4:08 AM by Chris
We moved into an apartment 2 months ago that was 11 years old. 
Every light flickers in the apartment even lights plugged into sockets for locker lights. 
I've had the electrical company out to check and they said all was ok on their end. 
The management company checked too and could find nothing. 
We have only the standard kitchen appliances and nothing that would use a huge amount of power. 
I've studied this all over and timed it to 2 minutes all flicker for 2 minutes and stop flickering for 2 minutes constantly all day every day. 
I don't mind paying an electrician to call to me if he could rectify problem but of not i will be paying dead money. 
Please help me as I'm on the verge of a nervous breakdown. 
Posted @ Monday, March 03, 2014 8:42 PM by Michael Keogh
try changing the bulbs, cheap bulbs will cause this problem not enough metal to sock contact.
Posted @ Friday, March 14, 2014 7:51 PM by Two left feet
Lights flicker and dim greatly when I plug in a vacuum on upper level of my home. Same lights upstairs and downstairs in cluding a chandelor . yesterday circuit breaker triggered and upstairs lights and basement lights wouldn't work. I reset breaker and whole breaker when I reset switch moved. The box that the switch rests in to flick / reset. I saw sparks and heard arcking /sizzlin noise. The entire circuit breaker panel is new as of last year. Could this be fire hazard even if circuit breakers are triggering It still doesn't explain why so many lights repeatedly , flicker and dim severely. Any help would be appreciated. I have kids ,smoke alarms,but I sense something is wrong. Or can certain lights continually flicker and dim if not whole house.  
Posted @ Thursday, April 03, 2014 6:46 PM by David Bilkey
A friend of mine just put two new reach in coolers side buy side in his package store for about tree months they worked fine except the last cooler all six tube type led lights started blinking intermittenly,the coolers are wired together in one circuit, I checked wiring back to fuse box seems okay the lights have intergrated drivers. I was thinking one could be bad but all six blink at the same time, and they don`t blink at first, maybe ten minutes after you turn them on. 
This is a real bummer any help at all would be appreciated, he has called the company complaining about but they say sure will fix them and you never hear from them this was
Posted @ Sunday, April 13, 2014 10:18 PM by David Bieniek
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Posted @ Thursday, May 22, 2014 6:15 AM by Antee Electrical
Tonight i noticed tonight that the dinning room light (on a dimmer switch for years) was flickering as well as one of the lamps in the living room with a florescent bulb. Neither has happened before and as i said the d/r dimmer switch has been in the house for years with no previous trouble.
Posted @ Saturday, May 24, 2014 8:44 PM by Bill
When I turn my light on in the kitchen it will stay on for a few minutes then turn off. I have to tap the light switch a couple times and it will turn back on again. This happens in the bathroom also. I live in a one bedroom apartment. 
Posted @ Friday, June 20, 2014 4:58 AM by easyrider
Thus just started Sunday. My lights flicker all over. All the power seems to dim than come back strong. Like the fan slows down than picks up. I'm calling my landlord today ASAP, thinking it's a short or power surge. Ideas?
Posted @ Wednesday, July 30, 2014 6:46 AM by Shaunta
I noticed our bathroom and br lights flickering. Day and night for the last couple of days. This has happened before but just quit.
Posted @ Tuesday, August 05, 2014 1:55 PM by Tonya
My nightlight in my room flickered once or twice yesterday. 
I unplugged it just 2 be safe.  
Should I call an electrician?  
Posted @ Friday, August 15, 2014 8:12 AM by Mag Fan
a continous filickring is taking place on lights in a bulding & flickring is coming from tranformer to main busbar. but same transformer supplies to other blocks also. why flickring in particular block only?
Posted @ Thursday, August 28, 2014 5:20 AM by praful muju
my recessed lights in bed room do the same thing, they are led bulbs on a dimmer switch all 6 do flick at night . switch i have is run by remote control > should i change switch to mechanical one instead of electronic? 
please replay  
Posted @ Thursday, August 28, 2014 6:10 AM by Sam
Very informative feedback. We are having flickering lights in a specific part of the house. It is lights in the kitchen and dining room. out of no where this started. the GFI has been reset the panel has been checked. Nothing looks abnormal. What other steps should we take before calling a electrician? 
Posted @ Wednesday, September 03, 2014 9:30 AM by carmen schoenmaker
Hi. We just bought a house, we bought new washer and dryer, but every time I run both at the same time, the lights go off, my main electric panel outside of the house brakes, I have to go and push it back again, I did it about 6 times, but it doesn't look right it is hot at the touch. I call the electrician, and still waiting for an appointment, it is usual? it is something wrong? Why the main electric panel? and not the one in the garage? thank you.
Posted @ Wednesday, September 10, 2014 10:34 AM by Janet
The lights in different rooms of my house seem to dim and flicker when I first turn them on. I also noticed that my fan will sometimes run slower and speed back up. The house is around 34-35 yrs old. Should I look to change the panel due to the age of the house? I recently noticed that my new Energy efficient surge protector was not grounded. Upon further inspection we found the outlet was wired backwards! Hots and neutrals on wrong posts.Could this be causing the dimming issues? Maybe more like this. Didn't know when house was purchased.
Posted @ Saturday, September 13, 2014 8:30 AM by Valarie
Im haveing a problem, in one room plug,, I have a tester ,, it shows it has light but ,you connect something and it dont work,, replaced plug,, still dont work,, two rooms down in bathroom ,, light flicker bad, make a buzzing noise,, shut breaker of,before I changed plug,, the house would shock you,, any info,, please,, when all this happen,, we had a real bad storm that night,
Posted @ Thursday, September 18, 2014 9:32 PM by Mart Garcia
I have had a problem with the lights dimming then brighten back up whenever the ac unit comes on or when I turn on the washer or dryer...I plan to call an electrician soon...
Posted @ Friday, September 19, 2014 4:06 PM by Dee
I have pond lights recently some thing gone wrong when I swithed on light stayed on for 5 minutes and then start flickering and the transfarmer get ver hot please advise
Posted @ Tuesday, October 07, 2014 4:08 PM by Khaliq
I have those energy "last forever light bulb" that always burn out ;-( and a particular one (over my head by desk) stays on for about 15 min, then goes out. Then another 15 min later it comes on? Is it overheating? Should I be concerned that it will cause an electrical fire?
Posted @ Wednesday, October 08, 2014 12:04 AM by Greta
I just bought a new house and the kitchen has hi hat lights. I replaced the bulbs that were blown with energy efficient bulbs. The twisted looking kind. After the lights have been on for a while a few of the bulbs start to flicker but not the whole circuit. Is it because i put the wrong kind of bulb or could it be bad wiring?
Posted @ Sunday, October 12, 2014 8:11 AM by amir ghassemi
I would like to know the fix for flickering lights. I have the same problem but only on one circuit. The power company replaced the transformer and wiring from that to the hand hole. A meter shows clean power coming into the house. Still blinking.
Posted @ Tuesday, October 21, 2014 2:20 PM by John
had a/c and heat installed on 2nd floor of house.lights flickering. Any suggestions.
Posted @ Sunday, October 26, 2014 11:25 PM by Mikie st.aubin
My flickering lights have been fixed. It was the Challenger Circuit Breaker. They don't make this style any longer. It turns out that when I shut off that particular circuit breaker, it made things worse! 
I'm going to have the whole panel replaced.
Posted @ Monday, October 27, 2014 7:01 AM by John
We had a power outage the other day, the house is back on, but the garage now seems not to have enough power to run anything. If i plug anything in like a fan or drill the fan will barely turn and if I try to use anything else it kicks off but the breakers arent kicked and this is 110, if it were 220 it would be like it was only running on one leg. Any Idea's
Posted @ Monday, October 27, 2014 8:30 PM by Kevin
I have connected four 40Watt bulbs with two dimmer switch. As in 2 bulbs on one dimmer each.  
When the both the dimmers are around 20-40% capacity , all the bulbs start flickering. 
Why does this happen ?  
Posted @ Wednesday, November 12, 2014 1:05 AM by Amey
My overhead lights in my home flicker sometimes without major appliances kicking on and off. It seems to stop as the bulbs warm up. What could this be? 
Posted @ Saturday, December 06, 2014 12:01 PM by Stephanie
having issues since i got my new dryer it is worse than before, had a new breaker box installed the electric company came out and put a new meter in, had no issues before this, they had to add jumper wires now lights flicker, it is even worse since i got a new dryer everytime it turns on the lights dim through out the entire house. 
Posted @ Monday, December 15, 2014 10:03 AM by jessica
my lights flicker when the hot water is turned on. i recently had a titan water heater installed . what can be the problem? please let me know if you can thanks!
Posted @ Friday, January 09, 2015 9:38 PM by edrey
thank you for this!!! this is exactly my problem and you had the best solution!!! thank you thank you!!!
Posted @ Tuesday, January 20, 2015 5:23 PM by Susan
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Posted @ Saturday, January 24, 2015 3:51 PM by Thomas Alva
I live in an Apartments, and the entire apartment is electrical. The living room wall heater goes out quite often and the thermostat has been replaced at least four times since we moved in, in March 2013. It also appears to me that it may have already had some previous problems there appear to be a burned area on the vent. My question is, when a unit goes out that frequently and the thermostat has to be replaced that often is it a sign that something more serious could be going on with the wiring that is causing that to happen. I really tried to convey my concerns to the maintenance men when they come but they don't think that it's a big deal; but with my daughter and my two little granddaughters here, for me it's become a grave concern.  
Can you please offer me any suggestions. 
Best Regards
Posted @ Wednesday, January 28, 2015 9:24 AM by Sandra Brown
Hello mr boyd I just have a question. I just moved into a apartment that has a mini deep freezer hooked up in my bed room and not very far the refrigerator is also hooked up but making a large electrical sound at the Same time my radio is going crazy and my phone drops calls gets no internet connection and every time I touch the door handle or radio a light switch I always get shocked ! Oh and I add in a high rise apartment building with a.lot of florescent light bulbs I hear high voltage electricity can harm you
Posted @ Sunday, February 01, 2015 5:51 AM by Ronda Scott
On one circuit their are about a dozen outletsand about ten lights. Is it possible Is it possible to have this many on one breaker and with of the lights on make it blink?
Posted @ Sunday, February 08, 2015 12:47 PM by Tom
About 3 years ago I was banging in a small picture hook putting a picture up underneath the light socket in the upstairs hall (stupidly) and for a split second the lights flickered so I had obviously hit something. 
I turned the power off removed the nail and then put the picture up with blue tack. 
Since then the light has worked perfectly fine and there have been no problems. 
I might be paranoid but I have suddenly started worrying that a fire could start, and wonder if I ought to get someone to come and just check that everything is ok as I have read that if the wires arc they could catch fire. 
BUT this was about 3 years ago!! I could be worrying about nothing so I have started leaving the light off! But even then if the other lights are on in the house I dont know if this could still cause a fire! 
What do you think?? Do I need to worry after all this time or should I keep the light off until I get it checked out? 
The whole house had been rewired when I moved in 8 years ago 
Posted @ Tuesday, February 17, 2015 8:26 AM by Kim
As part of putting a central heat pump in a house that only had 100A service, we had to do a full service upgrade to 200A meaning everything electrical from the incoming line to the heat pump, including the mast on the roof that the service line goes into, is new, excepting the actual meter which is only a 5-7 years old at most (local utility switched to smart meters recently). The city and the utility had to sign off on the job. So I'm hopeful I won't experience this problem!!! The new main box is so pretty and roomy!!! It's probably big enough I could go to 400A if I really wanted LOL! 
(National City, CA)
Posted @ Friday, March 13, 2015 9:06 PM by DT
My lights in my room flicker when they are all the way on. They dont flicker when they are dimmed. What is causing this?
Posted @ Tuesday, March 17, 2015 12:01 AM by Adrienne
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Posted @ Thursday, April 16, 2015 9:16 AM by Liza
Similiar problem as everyone else. I have flickering lights, fans slowing & speeding back up, lights get dim then bright, appliances changing pitch etc. Have had the JEA out 3 or 4 times. They say meter & supply are ok but if there is a nick in the underground cable it will eventually burn into & they will be able to fix it. One of their guys said he didnt think it was a problem in the house and after they left all was ok for 3 weeks then it started again. I have two panels, one for an extra apartment type bedroom and one for the main house. Have tightened connections in panels, pulled light switches and outlets & tightened. Also have replaced some that were questionable. Each time I repair or replace something the problem seems to go away for a while then return.Sometimes its ok for days. Sometimes it happens when very few things are on. Have tried disconnecting appliances one at a time & turning off breakers one at a time. I am at a loss & am on SS disability so no $ for an electrician but I can repair anything that can be diagnosed. Thanks for your help, We watch foster children and am worried about their safety .
Posted @ Tuesday, April 21, 2015 11:16 AM by graddy
Our lights in the whole house not only flicker but they get brighter and dimmer and I've also noticed that my microwave motor starts dragging and the light gets very dim. But it's when the lights get brighter that's a real question. Our home is twenty years old. Could it be the ground wire outside the house ?
Posted @ Saturday, April 25, 2015 8:14 AM by Charlie
Charlie-get your power company to come out and check your neutral.
Posted @ Saturday, April 25, 2015 3:15 PM by DT
I have a strange flickering issue on a manor house i am working on when the kitchen LED downlights are dimmed to a certain position it makes the LED wall lights flicker. these are supplied by seperate RCBOs. My first thought was a shared neutral somewhere, i would expect an RCD test to disconnect both at the same time if that was the case but they dont. any suggestions?
Posted @ Sunday, May 03, 2015 8:48 AM by Nathan
I got 3 rows of 11 lightbulbs on a circuit with a dimmer and timer,, here and there not always the same time they flicker heavily and brighten not always the same amount of time.. it's a new dimmer, checked all neutral and power connection. What could be the cause? Would voltage drop cause flickering of lights?
Posted @ Thursday, May 14, 2015 5:24 PM by jerome
I have a ceiling fan that has 6 15 or 25 watt lights on top of the fan and 3 25 or forty watt lights out n the bottom of the fan. I have replaced 4 of the 6 lights on the top part of the fan with dim able LED lights as the old lights burned out. The fan lights will flicker a little then I will lose all power to that circuit for a couple seconds then it's back on. So I checked my light switches for loss wires. I have one panel with three light switches in a row. When I wiggled 2 of the three the power outage was more frequent so replaced those switches it has gotten better but lights still flicker but not as much but the my tv will randomly turn off then come back on. I'm at a loss if you have any suggestions
Posted @ Friday, May 15, 2015 11:03 PM by Chris
I moved into rental property built back in the 70s last summer and seldom had the lights on until early fall when the heat necessitated a window aircon in the BR. I noticed the lights dim whenever it came on but already understood that one. However as winter set in and we spent more time in smaller rooms due to zonal heating, I noticed that BR light continually dimming and brightening and that the screen of the laptop also dimmed and brightened when in use. I ran a surge protector with a long cord from another room and tried the computer --no more problem-- but the ceiling light and night stand lamp still cycled through dim/bright phases. I thought it must be due to the baseboard zonal heaters but after reading this article I checked the main house areas and see no lighting problem when their heaters are on. Additionally, the BR lights still dim and brighten but only intermittently instead of every night. 
My landlord took vehement exception to notification of a maintenance issue (unrelated to this) early in my tenancy, informed me that the house was perfect and essentially told me he'd evict me if I reported any other problems, which makes this a bit of a pickle. Does the fact that the problem only occurs intermittently now lessen the seriousness of the situation or point to some other possible problem? I need to know how important it may be to have this checked out and/or fixed as it is no longer continuous. There is absolutely nothing putting any sort of extra load on the BR circuits now that I am aware of, the only things drawing power in the room are the over head light or the night stand light, and either or both will dim/bright when the problem occurs (ie when only one is on, that one shows the problem, when both are on, both dim/bright).
Posted @ Wednesday, May 20, 2015 11:54 PM by Art
Could a bad GFI cause lights in certain portions of the house to flicker from time to time seemingly for no reason/
Posted @ Tuesday, May 26, 2015 10:15 AM by
excellent article you wrote on light flicker. very professional
Posted @ Tuesday, June 23, 2015 8:28 PM by Jack Park
i have heard everyone 's problem but i have not found what is causing the problem and what the fix is! PLEASE what is the fix for this problem?!?!?
Posted @ Monday, July 20, 2015 10:44 PM by michael Martin
In half of my apartment the lights flicker often, not only when my AC starts up but on and off the whole time that it's on. We have another air conditioner in another room where the lights do not flicker, but certain outlets don't work if too many things are plugged in.
Posted @ Wednesday, July 22, 2015 10:33 PM by Violet
Lights flickering all parts of two story house. Plastic pipe for wires coming into house from ground has been pulled down by subsidence. Rain going down pipe. Could this be the cause of flickering?
Posted @ Sunday, July 26, 2015 11:48 PM by Ronn Nadeau
Our lights in the whole house not only flicker but they get brighter and dimmer and I've also noticed that my microwave motor starts dragging and the light gets very dim. But it's when the lights get brighter that's a real question. Our home is twenty years old. Could it be the ground wire outside the house ? 
Posted @ Sunday, August 02, 2015 9:44 AM by Anil Fernandes
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