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Error code reference

Maytag Dryer Error Code E4

Lower Radiant Sensor Fault Count (stack dryers only)

Maytag codesMaytag dryer codes

Lower Radiant Sensor Fault Count (stack dryers only) – same as E1 but for the lower pocket.

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What E4 means on a Maytag dryer

The E4 error code on a Maytag stack dryer indicates a Lower Radiant Sensor Fault Count, meaning the control board has detected repeated or accumulated faults from the radiant sensor located in the lower dryer pocket. This code functions identically to the E1 code but applies specifically to the lower unit in a stacked dryer configuration. The radiant sensor monitors heat levels inside the drum cavity and communicates temperature data to the control board to regulate the heating cycle. When the board logs a fault count that exceeds an acceptable threshold, it triggers E4 to alert the technician that the lower unit's sensor system is not operating within expected parameters.

The radiant sensor itself is a thermistor-based or infrared-type device that detects the heat radiating from the drum contents and the heating element during operation. A fault count accumulates when the sensor repeatedly sends readings that fall outside the expected range, either too high, too low, or erratic, during a drying cycle. This behavior points to a sensor that is failing intermittently, a wiring connection issue causing inconsistent signal transmission, or a control board that is misreading the sensor's output.

Because the E4 code is specific to the lower pocket of a stack unit, diagnostics should be focused entirely on the lower dryer's sensor circuit rather than the upper unit. Common points of failure include the sensor itself, the wiring harness connectors between the sensor and the control board, or physical damage to the sensor caused by excessive heat or lint accumulation near the sensor mounting location.

Source: manufacturer service documentation.

Common causes of E4

  1. 01

    Faulty lower radiant sensor

    Part replacement

    The radiant sensor in the lower dryer pocket may be degraded or failing intermittently, causing it to send out-of-range readings that accumulate as faults. Replacing the sensor is typically the most common resolution for a persistent E4 code.

  2. 02

    Loose or damaged wiring connections

    Wiring / connection

    The wiring harness connectors between the lower radiant sensor and the control board can loosen over time or sustain heat damage, resulting in intermittent signal faults. Inspecting and reseating or replacing affected connectors may resolve the code without sensor replacement.

  3. 03

    Lint or debris accumulation near the sensor

    Wiring / connection

    Heavy lint buildup around the radiant sensor mounting area can interfere with accurate heat detection, causing the sensor to report erratic readings. Cleaning the sensor and surrounding area thoroughly may reduce or eliminate fault accumulation.

  4. 04

    Excessive heat exposure causing sensor drift

    Part replacement

    Prolonged exposure to high operating temperatures can cause the sensor to drift out of its calibrated range over time, producing repeated fault readings even when wiring connections are intact. This typically requires sensor replacement.

  5. 05

    Control board malfunction

    Part replacement

    If the lower radiant sensor and all associated wiring test within acceptable parameters, the control board itself may be misinterpreting the sensor's signal and incorrectly logging faults. Control board replacement is considered after ruling out all other causes.

See the test procedure for each cause

Frequently asked questions about E4

What does E4 mean on a Maytag dryer?
E4 on a Maytag stack dryer indicates a Lower Radiant Sensor Fault Count for the lower dryer pocket. It means the control board has recorded repeated faults from the sensor that monitors heat inside the lower drum. This code is specific to stacked dryer models and does not appear on single-unit dryers. It signals a problem with the lower unit's heat sensing circuit that requires inspection.
Can I fix the E4 error code on my Maytag dryer myself?
Some causes of E4 can be addressed without professional help, such as cleaning lint from around the sensor or reseating a loose wiring connector. However, testing the radiant sensor's output and diagnosing control board issues requires a multimeter and familiarity with appliance wiring. If you are not comfortable working with electrical components inside the dryer, it is safer to contact a qualified technician.
Is it safe to keep using my Maytag dryer when E4 is displayed?
Continuing to run the lower dryer unit while E4 is active is not recommended. The radiant sensor plays a role in regulating heat, and a malfunctioning sensor could allow the dryer to overheat or run inefficiently. It is best to stop using the lower unit until the fault is diagnosed and resolved. The upper unit in a stack configuration may remain unaffected and usable depending on the model.
How much does it cost to repair an E4 error on a Maytag dryer?
Repair costs vary depending on the root cause. Sensor replacement parts typically range from $20 to $80, and professional labor can add $75 to $200 depending on your location and the service provider. If the control board is the source of the fault, parts alone can range from $100 to $300 or more. Getting a diagnostic estimate before authorizing repairs is a good practice.
Will resetting my Maytag dryer clear the E4 error code?
A power reset may temporarily clear the E4 code if the fault count resets after power is removed, but the code is likely to return if the underlying problem with the lower radiant sensor or its wiring has not been corrected. Resetting should be treated as a diagnostic step rather than a fix. Persistent reappearance of E4 after a reset confirms that a component repair or replacement is needed.

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