Maytag dryer — Error Code F22
The main control board detects an open circuit at the exhaust thermistor.
What it means
The F22 error code on a Maytag dryer indicates an "Exhaust Thermistor Open" fault. The main electronic control board continuously monitors the resistance of the exhaust thermistor (a Negative Temperature Coefficient or NTC sensor) to regulate drum temperature and cycle duration. If the control board reads an infinitely high resistance—meaning an open circuit—on the thermistor circuit, it immediately halts the heating cycle and displays F22 to prevent thermal runaway, fabric damage, or improper drying. This is a strict safety and operational lock-out. The thermistor is typically mounted on the blower housing and should read approximately 10,000 Ohms (10kΩ) at room temperature (77°F). As the dryer heats up, this resistance drops. When the sensor fails open, or if the wiring harness connecting it to the main control is severed, pinched, or disconnected due to vibration, the board completely loses its temperature reference. While the thermistor itself is the most common culprit, technicians must also verify the integrity of the DC voltage circuit from the main board to ensure the fault isn't stemming from a damaged microcomputer.
Likely Causes
- 1 Faulty Exhaust ThermistorThe NTC sensor mounted on the blower housing has internally failed open, providing infinite resistance to the control board.
- 2 Damaged Wiring HarnessA broken wire, loose pin connector, or corroded terminal between the thermistor and the main control board is breaking the circuit.
- 3 Failed Main Control BoardRarely, the thermistor input circuit on the main electronic control board burns out, making it unable to read the sensor's resistance.
How to clear / reset
To temporarily clear the F22 code from the display, unplug the dryer from the wall outlet or flip the dedicated circuit breaker for 5 to 10 minutes to perform a hard reset. Restore power, select a new cycle, and press start. However, because F22 is a hard diagnostic fault tied to a continuous sensor reading, the code will almost certainly return the moment the control board polls the open thermistor circuit. You cannot bypass this error using diagnostic modes. The only permanent way to clear this code and restore dryer functionality is to replace the faulty thermistor, repair the broken wiring harness, or replace the main control board if the sensing circuit has failed.
Common replacement parts
When to call a pro
If you lack a multimeter to test thermistor resistance (looking for roughly 10k Ohms at 77°F) or aren't comfortable disassembling the dryer bulkhead to access the blower housing, it is time to call a professional. Diagnosing wiring harness continuity issues or control board faults requires live voltage testing. Axis Appliance Repair offers a $90 diagnostic (waived on authorized repair) and backs all work with a 1-year parts and labor warranty.
FAQs
How much does it cost to fix a Maytag F22 error?
If the exhaust thermistor is the culprit, professional replacement typically ranges from $120 to $180 including parts and labor. If the main control board has failed, costs can exceed $300.
Can I fix the F22 code myself?
Yes, if you have a multimeter and basic hand tools. You will need to remove the lower access panel or front bulkhead to reach the blower housing where the thermistor is mounted to test its resistance.
Will the F22 code clear itself over time?
No. The control board polls the sensor continuously. Until the open circuit is closed with a working 10k Ohm thermistor, the F22 code will persist and block operation.
How long does it take a technician to fix this?
A trained appliance technician can usually diagnose the circuit, access the blower housing, and replace an exhaust thermistor in 30 to 45 minutes.
Will it damage the dryer to keep running it with this code?
The dryer will not allow you to run a cycle while the F22 code is active. It is a hard lock-out designed specifically to prevent overheating and potential fire hazards.
Need help with F22?
Our certified techs diagnose Maytag error codes daily. $90 diagnostic · 1-yr warranty.