Microwave shows a grill or convection heater error (on combination models); grill or convection modes do not heat, but standard microwave mode may still work.
Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
Possible Causes
How to Fix / Troubleshooting
Safety: Unplug the microwave and allow all internal parts to cool before inspection. Heating elements can remain hot after use.
User-level checks:
- 1. Confirm mode selection: Ensure you have selected the correct grill or convection mode and temperature, and allowed sufficient preheat time.
- 2. Observe operation: In grill mode, you should see the grill element glowing red after a short time. In convection mode, you should feel hot air from the fan outlet inside the cavity.
Technician-level checks:
- 3. Test heating elements: With the unit unplugged, measure resistance of the grill and convection elements. An open circuit indicates a failed element.
- 4. Inspect thermal cut-outs: Check any thermal cut-outs in series with the heaters for continuity. Replace if open.
- 5. Check heater relays: Verify that the control PCB is switching power to the heaters when commanded.
Heater and high-voltage work should be performed by a qualified technician. If grill or convection modes are inoperative, arrange service.
Repair Difficulty
Required Part
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