Frigidaire Range Error Code F101

F101 on a Frigidaire range means the magnetron auto power limit has been activated because the NTC temperature sensor detected that the magnetron exceeded its safe operating temperature. The magnetron shut itself off automatically as a protective measure. This code is tied to the thermal protection system built into the microwave section of the range. Allowing the unit to cool down completely is the required first step before further use or diagnosis.

You should not continue using the microwave function until the unit has cooled down and you have confirmed the cause of the error. The F101 protection system is designed to prevent heat damage to the magnetron and surrounding components. Using the microwave while it is still overheating or without addressing a recurring fault could lead to component failure or create a potential safety hazard. The oven and cooktop functions of the range are separate systems and are not affected by this code.

The NTC, or Negative Temperature Coefficient, sensor is a thermistor that monitors the magnetron's temperature during operation. Its electrical resistance decreases as temperature increases, and the control board continuously reads this resistance to track thermal conditions. When the sensor detects that the magnetron has exceeded a preset temperature limit, it signals the control board to activate the auto power limit and shut down the magnetron, generating the F101 code. A defective NTC sensor can also trigger this code falsely by reporting incorrect resistance values.

In some cases, yes. If the over-temperature condition was caused by extended cooking or a temporary ventilation restriction, the code may clear once the unit has cooled down fully and power is restored. However, if the code returns quickly during normal use, there is likely an underlying issue such as a faulty NTC sensor, a failing cooling fan, or a degraded magnetron that needs to be addressed.

Repair costs depend on the root cause. If the fix is simply cleaning blocked vents or adjusting cooking habits, there is no parts cost. Replacing an NTC temperature sensor is generally a lower-cost repair, typically in the range of $20 to $80 for the part. A cooling fan motor replacement may run $30 to $100 in parts. Magnetron replacement is the most expensive scenario, with parts alone often ranging from $100 to $250 or more, plus labor if you use a technician.