Microwave - Error, Fault or Function Codes

Fault codes are programmed in all Microwave Oven controls. These codes help our technicians quickly diagnose issues with a Microwave Oven. In the event that the electronic control displays an error, fault or function code, a trained Service Technician should be called to diagnose and correct the issue.

Fault Codes

A summary of the most common fault codes and their meanings is listed below.
Fault CodeDefinition
F1Open Thermal Sensor, due to excessive heat in microwave cavity
F2Shorted thermal sensor
F3Shorted touch pad panel
F4Open humidity sensor
F5Shorted humidity sensor
F6Shorted temperature probe
F10Shorted touch screen

Open temperature probe or the probe is not plugged in during a temp cook function. Make sure probe is firmly inserted into the wall of microwave and the food item.

888, 8888 or PFIt is possible to see this display upon initial installation or after power was restored due to a power failure. This display can be canceled and normal operation resumed by touching the Cancel/Off or Clear/Off pad. The clock can then be reset on models so equipped.
18 power watch codeIndication of an issue with the electronic control in the microwave.
Sometimes shutting off the circuit breaker or fuse that supplies power to the Microwave Oven for 30 seconds will clear the fault, error or function code. However, there are some cases when service may be required.

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