Maytag Dryer Error Code F3E4

F3E4 means the control board detected a short circuit in the inlet thermistor, with resistance below 328 ohms corresponding to a temperature reading above 391°F. The inlet thermistor is the sensor that monitors air temperature entering the dryer drum. The dryer shuts down because this reading is outside safe operating limits, whether the cause is a failed thermistor, shorted wiring, or a faulty control board.

Begin with TEST #4a: Thermistors on page 16 of the service manual. Disconnect power, locate the inlet thermistor, and measure its resistance with a multimeter. A shorted thermistor will read below 328 ohms; a functioning thermistor should read significantly higher at room temperature (typically around 10,000-50,000 ohms depending on ambient temperature). If the thermistor is out of range, replace it. If it reads correctly, inspect the wiring harness between the thermistor and control board for pinching or shorts before considering a control board replacement.

Yes. A shorted or pinched wiring harness between the inlet thermistor and the control board will produce the same low-resistance reading that triggers F3E4, even if the thermistor is functioning correctly. After measuring resistance at the thermistor itself, also disconnect the connector at the control board end and check for continuity between the wiring harness leads or between each lead and ground. Any unwanted continuity points to a wiring issue rather than a failed sensor.

No. The F3E4 code indicates the dryer's temperature monitoring at the inlet has been compromised. Without reliable temperature sensing, the control system cannot properly regulate heat, which creates a risk of overheating or fire. Do not bypass the fault or attempt to continue running the dryer until the thermistor circuit has been inspected and repaired.

An inlet thermistor typically costs $15 to $40 for the part. If you replace it yourself, that is your total cost plus about 30 to 60 minutes of work. A service technician will add a diagnostic fee and labor, bringing the total to roughly $100 to $200 in most markets. If the fault turns out to be a failed control board, parts alone can run $100 to $300, making professional diagnosis worthwhile before purchasing components.