Whirlpool Microwave Fault Codes

 

 

 

Failure
Code
Condition
Check/Repair
F2 Membrane switch failure 1. Unplug microwave oven or disconnect power.
2. Replace membrane switch.
3. If problem persists, replace electronic control.
4. Replace all parts and panels before operating.
5. Plug in microwave oven or reconnect power.
F3H Humidity sensor out of range 1. Unplug microwave oven or disconnect power.
2. Connect a new sensor to the electronic control (at P1).
3.Replace all parts and panels before operating.
4. Plug in microwave oven or reconnect power.
5. If problem persists, unplug microwave oven or disconnect power.
6. Replace electronic control.
7. Replace all parts and panels before operating.
8. Plug in microwave or reconnect power.
F3T Temperature sensor failure

1. Check that the oven temperature is not below 41°F (5° C) or above 140°F (60°C)
2. If problem persists:
Unplug microwave or disconnect power.
Replace control system assembly.

F6 Microwave relay failure 1. Unplug microwave or disconnect power.
2. Check wiring to Relay 4903 for short circuits.
3. If wiring is OK, replace electronic control.
4. Replace all parts and panels before operating.
5. Plug in microwave oven or reconnect power.
F7 Power to magnetron interupted 1. Unplug the oven for at least 40 seconds. Check to see if this solves the problem.
(Possible reason: Over temperature protection for the magnetron operated earlier.)
2. Unplug microwave oven or disconnect power.
3. Check the resistance of the magnetron thermostat. It should be close to 0 ohms.
4. Check the magnetron.
5. Check wiring to the 1100W inverter and control system.
6. Check operation of all interlock switches.
7. If switches operate correctly,
Unplug microwave oven or disconnect power.
Replace 1100W inverter.
8. If problem persists, replace control system assembly.