How to replace a sparking or melted light switch safely
Failing wall switches often develop loose connections that cause dangerous arcing, flickering lights, and melted plastic. Replacing the faulty switch yourself restores safe electrical continuity without requiring an expensive electrician, provided you shut off the power at the breaker first and wire the new switch securely.
What the numbers show
Counted from the threads quoted below. How we count
- The most recent one is from October 2026.
- This comes up 87.5× more often in r/askanelectrician than across the site as a whole.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
- 1Hiring an electrician2 people mentionedDid this help you?
- 2toggling the breaker off and on to testDid this help you?
- 3leaving it alone temporarily and using a headlampDid this help you?
- 4taking apart the switch to inspect the wiring and terminalsDid this help you?
- 5Turning off the breaker and temporarily taping the exposed wiresDid this help you?
- 6Attempting DIY rewiring and switch replacement without professional trainingDid this help you?
- 7Replacing the old remote accessory receiver switch with a standard 3-way wall switch.Did this help you?
- 8Calling customer service for compatibility recommendationsDid this help you?
- 9Using an electrical tester or multimeter to identify live wiresDid this help you?
- 10Using special connectors for mixing aluminum and copper wiresDid this help you?
- 11Using a meter to check circuit logic and testing continuityDid this help you?
- 12Switching from soldered connections to wire nutsDid this help you?
- 13Using a threaded pressure switch attached to a swivel tee or access fitting on the service port.Did this help you?
- 14calling a professional residential electricianDid this help you?
- 15identifying and removing dead copper wiringDid this help you?
- 16inspecting challenger breakers for potential failure to tripDid this help you?
- 17Flipping the main breaker for the whole house to be safeDid this help you?
- 18Watching a YouTube video to learn how to do itDid this help you?
- 19Flipping the breaker switch to see if it resetsDid this help you?
- 20Asking online forums for safety advice before starting the repairDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“I turned me light on to my bathroom and the lights started flickering and I could hear popping from behind the plate going to the switch.”source ↗
“Roommate said she was lying in bed when the closet light came on, the went to touch the twitch but it was already off, shocked her (said her hand still felt sore 30min later so, yeesh) and was sparking.”source ↗
“The lightswitch itself is so obviously melted that i just took it off and just taped the wires for now as an immediate safety thing.”source ↗
“Genuine, i have like $40 right now i just got divorced, i cannot pay an electrician and i also cannot have no power to half my home, so.”source ↗
“Well lo and behold I gave up due to losing sunlight from my window and tired of fooling with it for tonight. Hooked everything back up screwed it back into the wall with its plate and it’s working just fine again? Idk gents.”source ↗
“Have/had this weird switch in my garage to my outdoor spotlight over my driveway. It was being used as a 3 way switch. This switch was always glitchy and would cause the spotlights to turn themselves on.”source ↗
“Then, one day I was trying to figure out what’s this switches story and hit that on off sliding switch and it stopped working entirely.”source ↗
“Can I just replace it with a regular 3 way switch?”source ↗
“if you don’t have experience in single phase residential work and code, call a professional.”source ↗
“When we took it apart there was 1 copper and 1 silver attached to the box and the 2 other copper were free roaming 😅”source ↗
“I was going to replace the switches in my 60s house and found this… no they were not wrapped in tape.”source ↗
“Although it doesn't look like you have all that much wire to work with”source ↗
“The electricity in the garage (a couple of outlets, a light, and the door) have not worked since before I purchased the house a decade ago - maybe 12+ years of it not working.”source ↗
“I can buy a replacement pretty inexpensively, but I have a couple questions (including one that’s possibly silly) before just diving in:”source ↗
“Is it at all possible that my electricity in my garage is connected to my house and I would need to turn off the electricity to the house before messing with this?”source ↗
“My spouse and I wanted to switch out our dimmer pitch switch to the Leviton SureSlide dimmer switch, but we were surprised to find all of this.”source ↗
“I pulled the back off of the outlet and have no clue on how to go about replacing it with a standard light switch. It only has this one wire leading to it.”source ↗
“I want to replace the remotes with a more traditional wall control, so I called the customer service and they told me that the Hunter 99815 would work. However, after getting it, it has 3 wires.”source ↗
“I don't want to have to rewire this house for 3 wires just to have a wall control, so does anyone have any suggestions on what I can do?”source ↗
“Unfortunately, that switch is braized into the refrigerant circuit, so you need to recover the refrigerant to change it.”source ↗
“You'll have to replace the pressure switch which means opening up the system.”source ↗
Where this came up
People with this problem also raised
- 2No room for new wires in switch box
- 3How to replace a blown fuse safely
- 16How to replace two-prong outlets with three-prong without rewiring
- 4Why does touching my breaker panel turn my electric dryer back on?
- 4Can I replace a bad AC capacitor myself with zero experience?
- 27Electrician installed an outlet instead of a generator inlet box