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Cavity Lamp Failure
Microwave light does not turn on, but cooking works normally.
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Possible Causes
Burnt-out cavity lamp, faulty lamp socket, open lamp wiring, failed lamp relay on control PCB.
How to Fix / Troubleshooting
Safety: Unplug the microwave before replacing the lamp. Glass can be hot and fragile.
- 1. Access lamp: On many models, the lamp is accessible by removing the top grille and a small cover, or from the rear.
- 2. Replace bulb: Install a new microwave-rated lamp of the same type and wattage.
- 3. Inspect socket: Check for heat damage or loose contacts. Replace the socket if burnt.
- 4. If a new bulb does not light: The lamp relay or wiring may be faulty, requiring control PCB or harness repair.
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Repair Difficulty
Easy
2/5
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