6-2
FAILURE CODE INDICATIONS
NOTE:
Many of the problems listed in the
chart below may be solved by power cycling:
unplug microwave oven or disconnect power.
After one minute, plug in microwave oven or
reconnect power.
Failure Codes Indications
Display
Likely Failure Condition
Recommended Repair Procedure
Flashing
colon “:”
Power failure
After a power failure, the colon “:” will be flashing. Press any key to end this
indication. The colon will then be steady when in standby.
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).
Replace all parts and panels before operating.
Plug in microwave oven or reconnect power.
3.
5. If problem persists, unplug microwave oven or disconnect power.
6. Replace electronic control.
7. Replace all parts and panels before operating.
Plug in microwave or reconnect power.
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.
Plug in microwave oven or reconnect power.
4.
8.
5.
