Maytag Microwave Error Code F3 E0

F3 E0 indicates that the main oven cavity temperature sensor has been detected as either open (broken circuit) or shorted (zero resistance). The control board monitors this sensor continuously and shuts down operation when the signal falls outside the acceptable range. The sensor should read between 1000 and 1200 ohms at room temperature (77 degrees Fahrenheit) when tested at connector P2.

No. The F3 E0 code means the control board cannot accurately monitor the cavity temperature, which removes a key safety safeguard. Using the microwave in this condition risks undetected overheating. The unit should remain out of service until the sensor or wiring issue is resolved.

If the temperature sensor probe is the cause, replacement sensor parts typically range from $20 to $60 depending on the specific model. If professional labor is required, total repair costs including diagnosis and parts generally fall in the $100 to $250 range. In cases where the GOC AM control board is the source of the fault, parts and labor costs can be higher, and it is worth comparing repair cost against replacement cost for older units.

A knowledgeable DIYer can perform the initial diagnosis by disconnecting connector P2 from the GOC AM board and measuring sensor resistance with a multimeter. If the sensor reads outside the 1000 to 1200 ohm range, replacing the sensor is a straightforward repair. However, working inside a microwave involves capacitors that can retain a lethal charge even when unplugged, so the high-voltage capacitor must be discharged safely before any internal access.

Unplugging the microwave for a few minutes may temporarily clear the code, but it will return as soon as the control board performs its sensor check again. Because F3 E0 reflects a real hardware fault (an out-of-range resistance reading), the underlying sensor or wiring problem must be repaired before the error will stay cleared.