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Electrical Troubleshooting Lights that Flicker or Dim

How to Identify the Cause of Flickering or Dim Lights:Our lights have been getting dim and flickering, sometimes worse than the others, why is this happening? The Most Common Causes of Flickering Lights and Dim Lights.

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Flickering Lights and Dim Light Problems
Electrical Question: Our lights have been getting dim and flickering, sometimes worse than the others, why is this happening?

Also last week we had our air conditioner fixed but even with that off the lights still dim and flicker.
What do you think the problem might be? Any suggestions will be appreciated.

This electrical wiring question came from: Lakeisha, from Cleveland, Mississippi.

Dave’s Reply:
Thanks for your electrical wiring question Lakeisha.

How to Troubleshoot the Cause of Flickering or Dim Lights

Application: Troubleshooting the Cause of Dim or Flickering Lights.
Skill Level: Advanced – This is best performed by a Licensed Electrical Contractor. This problem may also require the Local Electric Utility Company or electric service provider.
Tools Required: Basic Electricians Pouch Hand Tools, a Voltage Tester or Multimeter.
Estimated Time: Depends on personal level experience, ability to work with tools and troubleshoot and inspect electrical circuits and electrical system components.
Precaution: Depending on the symptoms, identify the main panel or panel circuit in question, turn it OFF and Tag it with a Note before working with the wiring.
Notice: Burnt or damaged electrical wiring and circuit components should be replaced with new electrical materials of the same voltage and amperage rating.

The Most Common Causes of Flickering Lights and Dim Lights

Electrical Troubleshooting  for Flickering Lights and Dim Light Problems
The following are examples of  common causes of dim or flickering lights that will be identified as you consider the following questions about the condition and occurrences.

Do the lights flicker all the time, or just during certain times of the day?

Do the lights dim when specific equipment is started, such as an air conditioner or the furnace?

Does it seem that all of the home power is affected or just one circuit, or one part of the home?

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One Response to “Electrical Troubleshooting Lights that Flicker or Dim”
  1. william sims says:

    I have run across flickering lights before and found that somewhere in the past a homeowner or other person had wired the lights and receptacles by only twisting the wires together and then taping them. With movement of the house during changes in temperature this could cause wires to loose the connections. The worse case was when junction boxes were found behind a wall with no access and to complicate it even more, the boxes were not covered. When all the wire connections were properly replaced and in some cases new wires pulled into new junction boxes the problem was solved.