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Error code reference

Maytag Dryer Error Code F6E3

Communication error

Maytag codesMaytag dryer codes

Communication error: ACU cannot hear UI; communication between ACU and UI has not been detected.

First step from the service manual

Unplug dryer or disconnect power; check harness continuity and connections between the ACU and UI; check AC and DC supplies (TEST #1, page 12).

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

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What F6E3 means on a Maytag dryer

The F6E3 error code on a Maytag dryer indicates a communication failure in which the Appliance Control Unit (ACU) is not receiving any signal from the User Interface (UI) control board. The ACU serves as the main processing unit that coordinates all dryer functions, while the UI board handles the display, button inputs, and user selections. These two components communicate continuously through a dedicated wiring harness. When the ACU detects that this communication link has gone silent, it registers the F6E3 fault and typically halts normal operation to prevent uncontrolled behavior.

The most common root causes involve the wiring harness connecting the ACU and UI. Loose connectors, broken wires, or corroded terminals can interrupt the data signal between the boards. This type of fault is especially common if the dryer has experienced vibration over time or if the harness was disturbed during a previous repair. Beyond the wiring, failures in the AC or DC power supply can deprive one or both boards of the voltage they need to communicate, which can also produce this code even when the harness itself is intact.

Diagnosing F6E3 requires disconnecting power to the dryer before inspecting the harness for continuity and secure connections at both the ACU and UI ends. After confirming harness integrity, AC and DC supply voltages should be checked as outlined in the diagnostic test procedure. If power supplies and wiring check out, one or both control boards may have failed internally and require replacement.

Source: manufacturer service documentation.

Common causes of F6E3

  1. 01

    Loose or disconnected wiring harness

    Wiring / connection

    The connector at either the ACU or UI end of the communication harness may have worked loose due to vibration or a previous repair. Inspecting and reseating both connectors is the first physical check to perform after disconnecting power.

  2. 02

    Damaged or broken wiring harness

    Part replacement

    Individual wires in the harness can develop breaks or shorts, especially where the harness bends or passes through a panel edge. A continuity check across each wire in the harness will reveal any open circuits.

  3. 03

    Faulty AC or DC power supply

    Part replacement

    If either the ACU or UI is not receiving proper supply voltage, communication cannot be established even if the harness is intact. Voltage checks on both the AC and DC supply lines are a required part of the diagnostic process.

  4. 04

    Failed User Interface (UI) board

    Part replacement

    The UI board itself may have failed internally, preventing it from transmitting any signal to the ACU. If wiring and power supply tests pass, the UI board becomes the primary suspect.

  5. 05

    Failed Appliance Control Unit (ACU)

    Part replacement

    A failed ACU may be unable to detect or process signals from the UI even when the UI is functioning correctly. This is typically the last component suspected after all wiring and power supply checks have been completed.

See the test procedure for each cause

Frequently asked questions about F6E3

What does F6E3 mean on a Maytag dryer?
F6E3 indicates a communication error in which the Appliance Control Unit (ACU) cannot detect any signal from the User Interface (UI) board. The two control boards rely on a wiring harness to exchange data, and when that link is broken or absent, the ACU logs this fault. The dryer will not run normally until the communication problem is resolved.
Can I fix F6E3 on my Maytag dryer myself?
Some causes of F6E3, such as a loose wiring harness connector, can be addressed by a confident DIYer after disconnecting power to the dryer. However, performing voltage checks on the AC and DC supply lines requires a multimeter and basic electrical knowledge. If the fault points to a failed control board, replacing the component is straightforward but does require purchasing the correct part for your model.
Is it safe to use my Maytag dryer when F6E3 is displayed?
You should not attempt to operate the dryer while F6E3 is active. The error indicates that the main control board and the user interface are not communicating, which means the dryer cannot reliably manage its own functions. Continued use in this state could lead to unpredictable behavior or prevent the dryer from completing a cycle safely.
Will resetting my Maytag dryer clear the F6E3 error?
Unplugging the dryer or disconnecting power is actually the first recommended step in diagnosing F6E3, and a power reset may temporarily clear the code if the fault was caused by a transient issue. However, if the underlying cause is a damaged harness, a failed power supply, or a defective control board, the error will return once power is restored and the ACU attempts communication again.
How much does it cost to repair a Maytag dryer showing F6E3?
Repair costs vary depending on what component has failed. If only a wiring harness needs replacement, parts typically range from around $20 to $60. A replacement UI board or ACU can range from $100 to $300 or more depending on the model. Adding professional labor costs, a full control board replacement repair could run anywhere from $150 to $450 or higher.

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