What causes a light switch to stop working but light stays on?
A stuck-closed or failed switch can stop working while the light stays on. Loose or backstabbed wiring can also keep the circuit closed. Miswired 3-way switches may leave a light energized from the other switch. A shorted switch or damaged fixture wiring can bypass the switch. Our licensed, insured electricians repair switches and wiring in Epsom and Manchester.
Quick checks:
- Gently toggle the switch; note looseness or crackling.
- Try the other 3-way switch (if present).
- Turn off the breaker if there’s heat, odor, or sparks.
Updated: 2025-11-07 00:00:00
Need help in Epsom, NH? Call (603) 541-7986 or book online.
Sources
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