Microwave shows E08 and may run the fan or light unexpectedly; cooking functions disabled.
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 first: Unplug the microwave immediately if the fan or light runs continuously or if you suspect a stuck relay.
Basic steps:
- 1. Power reset: Leave unplugged for at least 10 minutes, then plug back in and observe. If the fan or light turns on by itself or E08 reappears, do not continue using the unit.
- 2. Check for moisture: Excess steam from cooking can enter the control area. Allow the unit to dry for several hours in a warm, dry environment.
Advanced steps (technician recommended):
- 3. Inspect control board: Remove the control panel and examine the main PCB for burnt spots, cracked solder joints, or corrosion.
- 4. Test relays: Using a multimeter, verify that the relays controlling the fan, light, and HV circuit are not stuck closed when de-energized.
- 5. Replace control board: If a relay or triac is stuck or the board is damaged, replace the entire main control board with the correct Westinghouse part.
Because this involves mains voltage and control electronics, board replacement is best done by a professional.
Repair Difficulty
Required Part
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