Maytag Dryer Error Code F3E3

F3E3 means the control board has detected an open circuit in the inlet thermistor. The inlet thermistor monitors air temperature entering the drum, and when its resistance rises above 245k ohms (equivalent to a sensed temperature below 18°F), the board logs this code. The fault points to the thermistor itself, its wiring harness, or the connectors in that circuit.

Start with TEST #4a: Thermistors on page 16 of the service manual. This test walks you through measuring the resistance of the inlet thermistor and checking continuity through its wiring harness. If the thermistor reads above 245k ohms at room temperature or shows an open circuit, replace the inlet thermistor. If the thermistor tests good, inspect the harness and connectors for damage or corrosion before suspecting the control board.

Yes. An open circuit anywhere in the wiring harness between the inlet thermistor and the control board will trigger F3E3, even if the thermistor itself is functional. Before ordering a replacement thermistor, inspect the connector at the thermistor and at the board for bent, corroded, or unseated pins. Reseating the connectors and clearing the code resolves the problem in some cases at no parts cost.

Running the dryer with F3E3 active is not advisable. Without a functioning inlet thermistor, the control board cannot accurately monitor air temperature during the cycle. This removes a key safeguard against overheating, which creates a potential fire hazard and can damage clothing. Resolve the fault before resuming normal use.

An inlet thermistor part typically costs between $15 and $40 depending on the model. If you are comfortable using a multimeter and removing the dryer's back or top panel, this is a repair most homeowners can complete in under an hour. If a technician is needed, expect a service call plus labor totaling $100 to $200 in most markets, depending on your location and the technician's rate.