Maytag dryer — Error Code F22
The main control board has identified an open circuit at the exhaust thermistor location.
What it means
The F22 error on a Maytag dryer signifies an "Exhaust Thermistor Open" fault. The appliance's main electronic control board monitors the resistance of the exhaust thermistor—a Negative Temperature Coefficient (NTC) sensor—to manage drum heat and cycle length. If the board detects infinite resistance, signifying an open circuit, it immediately stops the heating process and displays F22 to protect your clothing from overheating or damage. This is a mandatory safety lockout. The thermistor is located on the blower housing and should measure approximately 10,000 Ohms (10kΩ) at an ambient temperature of 77°F. Resistance levels decrease as the unit warms up. If the sensor fails open, or if the wiring harness connecting it to the main control is damaged, disconnected, or pinched due to unit vibrations, the board loses its temperature data. While the thermistor is usually the source of the issue, technicians must also check the DC voltage circuit from the main board to ensure the error isn't caused by a faulty microcomputer.
Likely Causes
- 1 Malfunctioning Exhaust ThermistorThe NTC sensor attached to the blower housing has failed internally, resulting in an open circuit that provides infinite resistance to the control board.
- 2 Compromised Wiring HarnessA severed wire, a loose pin connector, or corrosion on the terminals between the thermistor and the main control board is interrupting the electrical signal.
- 3 Defective Main Control BoardIn rare instances, the thermistor input circuit on the main electronic control board has burned out, preventing it from reading the sensor's resistance values.
How to clear / reset
To attempt a temporary reset of the F22 code, disconnect the dryer from the power source or flip the dedicated circuit breaker for 5 to 10 minutes. Once you restore power, try selecting a new cycle and starting the unit. However, because F22 is a persistent diagnostic fault triggered by a continuous sensor reading, the code will likely reappear as soon as the control board checks the open thermistor circuit. You cannot bypass this error through diagnostic modes. The only way to permanently resolve the issue and restore operation is to replace the defective thermistor, fix any damaged wiring, or swap the main control board if the sensing circuit is at fault.
Common replacement parts
When to call a pro
If you are not equipped with a multimeter to verify thermistor resistance (targeting 10k Ohms at 77°F) or feel uncomfortable removing the dryer bulkhead to reach the blower housing, please contact a professional. Troubleshooting wiring continuity or control board issues requires live voltage testing. A-Fix Service provides a $90 diagnostic fee (waived if you authorize the repair) and includes a 1-year parts and labor warranty on our work.
FAQs
What is the typical cost for a Maytag F22 repair?
Replacing the exhaust thermistor usually costs between $120 and $180, covering both parts and labor. If the main control board requires replacement, prices can rise above $300.
Can I perform this repair myself?
Yes, provided you have basic tools and a multimeter. You will need to access the blower housing by removing the lower panel or front bulkhead to test the thermistor's resistance.
Will the F22 code eventually clear on its own?
No. The control board monitors the sensor constantly. The F22 code will remain and block usage until you close the circuit with a functional 10k Ohm thermistor.
How long does the repair process usually take?
A qualified technician can typically diagnose the circuit, reach the blower housing, and install a new exhaust thermistor within 30 to 45 minutes.
Is it safe to continue using the dryer with this error?
The dryer will not allow a cycle to run while the F22 code is present. It is a hard lock-out feature intended to prevent overheating and potential fire risks.
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