Maytag Dryer Error Code F03 — Temperature Sensor Problem
What this means
The F03 error code indicates the dryer's exhaust thermistor (temperature sensor) is sending abnormal readings to the control board. The sensor may be open, shorted, or have damaged wiring. Without accurate temperature data, the dryer cannot regulate heat properly, which may cause clothes to come out damp or overly hot.
Alternate codes: F3
Step-by-step fix
4 stepsLocate the exhaust thermistor
Unplug the dryer and remove the lower front panel or rear panel (depending on model) to access the exhaust thermistor, typically mounted on the blower housing.
Consult your model's tech sheet for the exact thermistor location.
Test the thermistor resistance
Disconnect the thermistor wires and measure resistance with a multimeter. At room temperature, the thermistor should read approximately 10,000 ohms (10K).
If the reading is 0 or infinite, the thermistor is defective.
Check the wiring harness
Inspect the wire connections between the thermistor and the main control board. Look for broken wires, corroded connectors, or loose plugs.
Dryer vibration can loosen wire connections over time.
Replace the thermistor
If the thermistor reads out of range, replace it. It is typically held by one or two screws and has a simple plug connector.
This is an inexpensive part and one of the easier dryer repairs.
When to call a professional
If replacing the thermistor does not clear the error, the main control board may be faulty and should be diagnosed by a professional.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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