A microwave that powers on but does not heat needs careful handling. Start with checks that do not involve internal parts.
Safe checks before booking service
- Test with a microwave-safe cup of water for 60 seconds to confirm symptoms.
- Ensure the door closes firmly and latch area is clean.
- Try a different outlet to rule out weak power supply issues.
- Reset the unit by unplugging for one minute, then retry.
Likely causes
- Door switch not engaging correctly
- Control board or relay problem
- High-voltage component failure
- Intermittent power supply issues
When to stop and call a pro
Do not remove microwave covers or inspect internal electrical parts. High-voltage components can remain dangerous even when unplugged. If no-heat symptoms persist, schedule professional diagnosis.