Frigidaire Range Error Code F098

F098 indicates that the NTC temperature sensor mounted on the magnetron case has been detected in a shorted condition. The sensor is a thermistor that monitors magnetron temperature, and when its resistance drops below the expected range, the control board triggers this fault code. The appliance shuts down magnetron operation to prevent potential damage. Replacing the NTC sensor is the recommended first step in resolving this fault.

The F098 fault will disable magnetron operation, so the microwave function of the range will not work while the code is active. Standard oven and cooktop functions may still be available depending on your model. You should not attempt to bypass the fault, as the sensor exists to protect the magnetron from overheating. Address the fault before resuming microwave use.

Repair costs depend on whether the issue is limited to the NTC sensor or involves additional components like the wiring harness or control board. The NTC sensor part itself is relatively inexpensive, typically in the range of $15 to $50. If professional labor is required, total repair costs including diagnosis and labor generally fall in the range of $100 to $250. Costs increase significantly if the control board also needs replacement.

Replacing the NTC sensor is a parts-based repair that some experienced DIYers can perform, but it does involve working near the magnetron, which stores high voltage even after the unit is unplugged. The capacitor in the magnetron circuit can retain a dangerous charge. For safety, this repair is best handled by a qualified appliance technician unless you have specific experience discharging high-voltage capacitors.

A power reset, such as unplugging the unit or cycling the circuit breaker for a few minutes, may temporarily clear the code, but it will return as soon as the control board re-reads the shorted sensor signal. A reset does not fix the underlying hardware failure. The fault will persist until the faulty NTC sensor or any shorted wiring is physically repaired or replaced.