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Error code reference

Maytag Dryer Error Code F3E4

Inlet thermistor is shorted; temperature above 760°F (<20 ohms)

Maytag codesMaytag dryer codes

Inlet thermistor is shorted; temperature above 760°F (<20 ohms). Only appears in service diagnostic mode.

First step from the service manual

See TEST #4a: Thermistors, page 15.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What F3E4 means on a Maytag dryer

F3E4 indicates the control board has detected a short circuit in the inlet thermistor circuit, with a resistance reading below 328 ohms. This corresponds to a temperature reading above 391°F at the air inlet, which is beyond the normal operating range of a residential dryer. The control board monitors thermistor resistance continuously; when resistance drops this low, it interprets the condition as an extreme or dangerous temperature and triggers the fault. Maytag's diagnostic procedure directs technicians to TEST #4a: Thermistors on page 16 to confirm whether the thermistor itself, the wiring harness, or the control board is responsible.

For homeowners, the inlet thermistor is a small sensor that monitors the temperature of air entering the drum. When it fails by shorting internally, it sends a false signal to the control board suggesting the dryer is overheating past safe limits. The dryer shuts down to prevent potential heat damage or fire risk. In most cases, the thermistor sensor itself has failed and needs replacement, though damaged wiring between the sensor and the control board can produce the same fault. This is generally a low-to-moderate difficulty repair depending on your comfort level with appliance disassembly.

Source: manufacturer service documentation.

Common causes of F3E4

  1. 01

    Failed inlet thermistor (internal short)

    Part replacement

    The thermistor itself has shorted internally, dropping resistance below 328 ohms and causing the control board to read an impossibly high inlet temperature. This is the most common cause of F3E4 and is confirmed by measuring thermistor resistance directly.

  2. 02

    Shorted or pinched wiring harness to inlet thermistor

    Part replacement

    The wiring harness connecting the inlet thermistor to the control board may be pinched, frayed, or shorted to ground, producing a false low-resistance reading at the control board even if the thermistor itself is functioning correctly.

  3. 03

    Moisture or contamination at thermistor connector

    Wiring / connection

    Water intrusion or lint buildup at the thermistor connector can cause a short-circuit condition across the connector pins, lowering resistance and triggering the F3E4 fault without actual thermistor failure.

  4. 04

    Faulty control board

    Part replacement

    If the thermistor and wiring harness both test within normal resistance ranges, the control board's thermistor input circuit may have failed and is misreading the sensor signal. This is the least likely cause and should only be replaced after eliminating the thermistor and wiring.

See the test procedure for each cause

Frequently asked questions about F3E4

What does F3E4 mean on a Maytag dryer?
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.
Is it safe to keep using my Maytag dryer with an F3E4 error code?
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.
How do I fix F3E4 on a Maytag dryer?
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.
How much does it cost to fix an F3E4 error on a Maytag dryer?
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.
Can a wiring problem cause F3E4 on a Maytag dryer instead of a bad thermistor?
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.

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