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Error code reference

Maytag Dryer Error Code F3E7

Rear moisture sensor strip is open or shorted (Maytag models only); only appears in service diagnostic mode.

Maytag codesMaytag dryer codes

Rear moisture sensor strip is open or shorted (Maytag models only); only appears in service diagnostic mode.

First step from the service manual

See TEST #5: Moisture Sensor, page 22.

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

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What F3E7 means on a Maytag dryer

F3E7 indicates the Maytag dryer control board has detected a short circuit in the moisture sensor strip circuit. This fault only surfaces during service diagnostic mode, meaning it will not appear during normal operation cycles. The moisture sensor strip is a pair of metal bars inside the drum that measure the electrical conductivity of tumbling clothes to determine how wet they are. A short in this circuit means the two sensor bars are electrically connected when they should not be, sending a false signal to the control board.

For homeowners, the moisture sensor strip is the component responsible for telling your dryer when clothes are actually dry. When these bars short together, the dryer cannot accurately read moisture levels. In practice, this can cause the dryer to cut cycles short, run indefinitely, or behave inconsistently on automatic drying cycles. The dryer may still run, but timed dry cycles are more reliable than automatic ones while this fault is present.

The first diagnostic step is TEST #5: Moisture Sensor on page 19 of the service manual. This test walks through checking resistance values across the sensor bars, inspecting the wiring harness between the sensor and control board, and confirming whether the short originates at the sensor strips themselves, the connecting wiring, or the control board.

Source: manufacturer service documentation.

Common causes of F3E7

  1. 01

    Contaminated or coated moisture sensor bars

    Wiring / connection

    Residue from dryer sheets, fabric softener, or lint buildup can bridge the two sensor bars electrically, creating a short circuit. Cleaning the bars with rubbing alcohol often resolves this without any part replacement.

  2. 02

    Shorted moisture sensor strip assembly

    Part replacement

    The sensor strip itself can fail internally, creating a permanent short between the two conductive bars. When cleaning does not resolve the fault, the sensor strip assembly must be replaced.

  3. 03

    Damaged wiring harness between sensor and control board

    Part replacement

    Chafed, pinched, or melted wiring in the harness connecting the moisture sensor to the control board can cause two wires to contact each other, mimicking a shorted sensor. Inspecting the harness routing through the drum area is part of TEST #5.

  4. 04

    Failed main control board

    Part replacement

    If the sensor strip and wiring harness both test within normal parameters, the control board itself may have a failed input circuit that incorrectly reads a short condition. This is the least likely cause and should only be suspected after the sensor and wiring have been ruled out.

See the test procedure for each cause

Frequently asked questions about F3E7

What does F3E7 mean on a Maytag dryer?
F3E7 means the control board has detected a short circuit in the moisture sensor strip, which is the pair of metal bars inside the drum that measures how wet your clothes are. This code only appears in service diagnostic mode, not during normal operation. The short can originate at the sensor bars themselves, the wiring harness, or in rare cases the control board.
How do I fix F3E7 on a Maytag dryer?
Start by cleaning the moisture sensor bars inside the drum with a cotton ball and rubbing alcohol to remove any fabric softener or dryer sheet residue, which can cause a false short. If the code persists in diagnostic mode after cleaning, follow TEST #5: Moisture Sensor on page 19 of the service manual to check resistance values and inspect the wiring harness. If the sensor strip fails the test, replace the moisture sensor strip assembly. If the harness is damaged, repair or replace it.
Can I still use my Maytag dryer if it shows F3E7?
F3E7 only appears in service diagnostic mode, so your dryer will still run normally during standard operation. However, a shorted moisture sensor means automatic drying cycles cannot accurately detect when clothes are dry, which can result in over-drying or under-drying. Switching to timed dry cycles is the most reliable workaround until the sensor is repaired.
How much does it cost to fix the F3E7 error code on a Maytag dryer?
If cleaning the sensor bars resolves the short, the repair costs nothing. A replacement moisture sensor strip assembly typically costs between $15 and $40 in parts and is a DIY-accessible repair requiring basic tools and around 30 minutes. A wiring harness repair or replacement adds $20 to $60 in parts. If the control board is at fault, parts alone run $100 to $200 or more, and professional labor typically adds $80 to $150, making board replacement the most expensive scenario.
Is F3E7 hard to diagnose on a Maytag dryer?
The diagnosis is manageable for a DIY homeowner comfortable with basic appliance repair. The service manual TEST #5 on page 19 provides a structured process for checking the sensor bars, measuring resistance with a multimeter, and tracing the wiring harness. Cleaning the sensor bars first costs nothing and takes only a few minutes. If you need to go deeper into wiring or the control board, a qualified technician can complete the diagnostic more quickly using the same test procedure.

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