Check and tighten all light bulb connections (turn power off first, then tighten firmly)
Replace flickering bulbs with new bulbs of the same type and wattage
If using a dimmer, replace the dimmer switch with one rated for the bulb type (LED vs incandescent/halogen)
Ensure the dimmer is compatible with the bulb’s dimming method (leading-edge vs trailing-edge)
Replace any faulty dimmer switch or switch wiring
If lights are on a multi-switch circuit, verify the correct wiring for the switch controlling the fixture
Check for loose or damaged wiring connections at the fixture and switch (turn power off before inspecting)
Inspect the fixture socket for heat damage, corrosion, or worn contacts; replace the socket if needed
Check the breaker for signs of arcing, overheating, or looseness; tighten firmly and replace if defective
If flicker affects multiple rooms, test other circuits to determine whether the issue is in the service panel or the branch wiring
If flicker is frequent or widespread, contact the power utility to check voltage stability and service issues
If the flicker occurs when large appliances start (HVAC, refrigerator, microwave), consider having the electrical system load and connections inspected
Install surge protection or a whole-house voltage regulator if voltage fluctuations are confirmed
Keep fixtures and bulb bases clean and dry; replace any moisture-damaged components
If you find aluminum wiring, damaged conductors, or burning smells/brown marks, stop and call a licensed electrician
Verify correct fixture compatibility (use fixtures rated for the bulb type, especially for enclosed fixtures)