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Light going out when furnace or refrigerator kick off

Home Improvement Asked by Anonymous Man on June 7, 2021

I have recently added a new circuit in my basement that includes a couple of wall switches connected to can lights in the ceiling and a 4 plug outlet. One of the can lights has a habit of going out, even though the wall switch is still in the on position. When I turn the switch off and back on, the light comes back on just fine.

After some observation I have noticed 2 events that trigger the light to turn off. It happens when the condenser on a mini-fridge shuts off (not on) and also happens when the furnace kicks off (not on). The mini fridge is on the same circuit with the affected light, but the furnace is not. The breaker is not being thrown and nothing but this light seems to be affected.

It is a cheapo LED light, so not so easy to just replace a bulb. I assume I could find one online if that’s what I need to do, but I was hoping for some troubleshooting suggestions first.

Any idea what could be causing this?

edit: To clarify, it doesn’t happen every time the appliances kick off, but a few times a day.

One Answer

Easy troubleshooting...I would say it is the LED's you have, but you can put a spare or el cheapo pull chain light kit up and test with regular incandescent bulb. If you don't have the same issue, then it is your cheapo LED's. Issue persists, then it is a wiring issue somewhere.

You can use any kind of light fixture for your testing purposes, or even convert one into an outlet for a moment and use a plug in table lamp.

Answered by Jeff Cates on June 7, 2021

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