One or all cooktop lights fail, flicker, or shut off after warming up. Range-hood performance depends on the appliance, filters, ducting, and installation, so the sound of a running fan alone does not confirm proper ventilation.
Common causes
- The lamp or LED module has failed
- The bulb type, wattage, or installation is incorrect
- A socket, connector, transformer, or LED driver is damaged
- The light switch, touch control, or control board has failed
How the problem is diagnosed
The correct lamp specification is confirmed before the socket, output voltage, driver or transformer, wiring, and control command are tested. When all lights fail together, the shared supply and control are checked before individual lamps are replaced.
Electrical and airflow findings are considered together. Appliance Repair Pro explains the diagnosis and provides an upfront estimate before approved work begins.
Information to prepare
Note whether the fan still works, whether one or all lights are affected, and the bulb or LED module type if accessible without disassembly. The full model number and a photo of the hood and duct arrangement can help identify the correct parts and service scope.
Repair or replace?
Switches, lights, capacitors, and some motors are often serviceable when parts are available. Replacement may make more sense when the hood has extensive grease damage, an unavailable integrated control, or an installation that cannot deliver adequate capture. Diagnosis helps separate an appliance repair from a duct or installation issue.
