E21 - Error Code - Over-the-Range Microwave
Reset power to the product:
The Thermal Sensor circuit reported open to the control board. There may a problem with the Thermal Sensor, the Appliance Control Board, or the associated wiring.
- Power unit down by turning off the circuit breaker(s) for one (1) minute.
- Power unit up by turning on the circuit breaker(s).
- Monitor the microwave for one (1) minute to ensure the error code does not display again.
- Verify microwave operation.
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