The cavity light, cooling fan, or over-the-range exhaust fan may stop while other functions still respond. This symptom can have more than one cause, so the full model number and operating behaviour matter.
Common causes
- The lamp or LED assembly has failed
- A fan motor is obstructed or worn
- A door switch is not reporting the correct position
- The control board, relay, connector, or wiring has a fault
These are diagnostic possibilities, not a parts list. The same symptom can be produced by a mechanical problem, a loose connection, or an electronic fault.
How the problem is diagnosed
Diagnosis identifies which fan or light circuit is affected, verifies the door-switch signals, and checks whether the component receives the proper voltage. On over-the-range models, the exhaust fan and internal cooling fan are separate systems and must be tested separately.
The findings should be explained before any repair begins. Appliance Repair Pro provides an upfront repair estimate, and no repair proceeds until you approve it.
Information to prepare before the visit
Note whether the problem affects the cavity light, cooktop light, exhaust fan, or internal cooling fan, and which settings still work. A short video can also help when the symptom is intermittent, provided it can be recorded without operating an unsafe appliance.
Repair or replace?
The decision depends on the failed part, model age, parts availability, installation type, and the condition of the cavity, door, and controls. Built-in and over-the-range models may justify repair when the cabinet and door are sound; severe cavity or door damage can change that decision. A diagnosis allows you to compare the repair estimate with replacement and installation costs.
