Instant
Output Drive Failure / Control Logic Fault
Timer counts down but heater and fan do not run; unit appears on but not cooking.
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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.
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Possible Causes
Failed heater and fan relays, Faulty main control board microcontroller, Disconnected fan or heater wiring, Software glitch
How to Fix / Troubleshooting
Safety first: Unplug before inspecting internal wiring.
- Check for airflow and heat: During a cycle, feel for air at the vents and heat in the cavity. If both are absent, outputs are not being driven.
- Power reset: Unplug for 10 minutes and retry a simple manual cook mode.
- Inspect wiring (advanced): Verify that the fan and heater connectors are firmly attached to the main control board.
- Listen for relay clicks: If no relays click when starting a cycle, the board may be defective.
- Replace main control board: If wiring is intact and the issue persists, replace the main control board assembly.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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