Maytag Neptune Dryer Error Code F22: Thermistor Fault... | appliancefaults.com

Technical Background:

The F22 error code indicates a problem with the thermistor circuit. The thermistor is a temperature-sensing device that sends a voltage signal back to the Main Control Unit (MCU). The MCU interprets this voltage to regulate the dryer's heating element. If the MCU detects an out-of-range voltage, it triggers the F22 error.

Symptoms:

The dryer displays the F22 error code on the control panel. The dryer may not heat, or it may stop mid-cycle.

Possible Causes:

Faulty thermistor itself.
Wiring harness damage between the thermistor and the control board.
Loose or corroded connections.
A problem with the dryer's control board (MCU).
Blocked vent causing overheating, impacting the thermistor's readings.
Thermistor not properly seated in the housing.

Solution:

1

Unplug the dryer or turn off the breaker.
2

Locate the thermistor. It's usually on the blower housing. Disconnect the wires from the thermistor.
3

Using a multimeter set to Ohms, test the thermistor's resistance. At room temperature (approximately 75°F), it should read around 10,000 Ohms (10k Ohms). Refer to the dryer's service manual for the exact specification.
4

If the thermistor reading is significantly different from the specification (open or shorted), replace the thermistor. Use a 1/4-inch nut driver to remove the mounting screws.
5

Inspect the wiring harness and connectors for any damage (cuts, breaks, corrosion). Repair or replace as needed.
6

Check the exhaust vent for blockages. Clear any lint buildup using a vacuum cleaner or vent cleaning kit.
7

Reconnect the thermistor, reassemble the dryer, and restore power. Test the dryer to see if the error code is cleared.

Safety Warning:

Disconnect power to the dryer at the breaker panel before performing any repairs. Capacitors in the control board can hold a charge even after the dryer is unplugged. Exercise caution when working near the control board.

Prevention:

Clean the lint filter after every load. Inspect and clean the exhaust vent at least once a year. Avoid overloading the dryer.

Expert Tip:

Some Maytag Neptune dryers have a diagnostic mode. To enter diagnostic mode, press and hold the Start/Pause and Temp buttons simultaneously for 3 seconds. This will display any stored error codes and allow you to run diagnostic tests.

Frequently Asked Questions

•What is the specific resistance value of the thermistor for my Maytag Neptune model?

The resistance value varies slightly depending on the exact model. Consult the service manual for your specific model number. The value is typically around 10k ohms at room temperature (75°F).

•How do I access the thermistor on my Maytag Neptune dryer?

Typically, you'll need to remove the rear panel of the dryer. The thermistor is usually located on the blower housing, near the heating element assembly. You might need a 1/4-inch nut driver to remove the screws holding the panel and the thermistor in place.

•If the thermistor tests good, what else could be causing the F22 error?

If the thermistor tests good, the problem could be with the wiring harness between the thermistor and the control board, a loose connection, or a faulty control board (MCU). Carefully inspect the wiring and connectors for any damage or corrosion. If everything else checks out, the control board may need to be replaced, but this is usually a last resort.

Maytag Neptune Dryer Error Code F22: Thermistor Fault Troubleshooting

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the specific resistance value of the thermistor for my Maytag Neptune model?

•How do I access the thermistor on my Maytag Neptune dryer?

•If the thermistor tests good, what else could be causing the F22 error?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: