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Error code reference

Frigidaire Washer Error Code E55

Motor sensing failure on main board

Frigidaire codesFrigidaire washer codes

Motor sensing failure on main board — main board defective.

First step from the service manual

Replace the electronic control board and retry.

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

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What E55 means on a Frigidaire washer

The E55 error code on a Frigidaire washer indicates a motor sensing failure detected at the main control board. The main board is responsible for monitoring motor operation through feedback signals that report speed, load, and rotational status. When the board fails to correctly read or interpret these signals, it flags E55 as a fault condition. Because the fault is identified as originating within the board's sensing circuitry itself, the board is considered defective rather than the motor or its wiring.

The motor sensing circuit on the main board typically processes signals from the motor's tachometer or hall effect sensors. If the board's internal components that handle this signal processing fail, such as a damaged input circuit or failed microprocessor logic, the board cannot confirm motor behavior and triggers the E55 code. External factors like power surges or moisture intrusion can damage these sensing circuits over time.

Because the failure is localized to the main board's sensing capability rather than an upstream wiring or motor fault, the prescribed diagnostic action is direct replacement of the electronic control board. Attempting to clear the code without replacing the board will typically result in the fault returning immediately or upon the next motor demand cycle. There are no adjustment procedures or resets that address a defective sensing circuit on the board itself.

Source: manufacturer service documentation.

Common causes of E55

  1. 01

    Defective main control board

    Part replacement

    The motor sensing circuitry on the main board has failed internally, preventing it from reading motor feedback signals. This is the primary cause identified for E55 and requires board replacement.

  2. 02

    Power surge damage to the control board

    Part replacement

    A voltage spike can damage the sensitive input circuits on the main board that handle motor sensing. Inspect the board for visually burned or scorched components as a confirming sign.

  3. 03

    Moisture or corrosion on the board

    Part replacement

    Water intrusion into the control board housing can corrode the motor sensing circuit traces or connectors over time. Look for residue, discoloration, or corroded pins on the board and its connectors.

  4. 04

    Loose or damaged wiring harness connection to the board

    Wiring / connection

    A loose connector at the main board can disrupt the motor sensing signal and mimic a board failure. Inspect all harness connections to the board and reseat any that are loose before replacing the board.

See the test procedure for each cause

Frequently asked questions about E55

What does E55 mean on a Frigidaire washer?
E55 indicates a motor sensing failure at the main control board, meaning the board cannot properly monitor the motor's operation. The fault is identified as originating within the board itself, not in the motor or external wiring. Frigidaire's diagnostic guidance treats the main board as defective when this code appears.
Can I fix the E55 error myself on a Frigidaire washer?
A knowledgeable DIYer can replace the main control board, which is the required fix for E55. Before ordering a board, check that all wiring harness connectors to the existing board are fully seated, as a loose connection can sometimes produce this fault. If connections are secure and the code persists, the board needs to be replaced.
Will resetting my Frigidaire washer clear the E55 code?
A reset will not permanently clear E55 because the fault is caused by a defective component on the main board, not a temporary software glitch. The code will return as soon as the washer attempts to run the motor again. The only resolution is replacing the main control board.
Is it safe to use my Frigidaire washer when E55 is displayed?
You should not continue using the washer while E55 is active. The board cannot properly monitor the motor, which means the machine lacks the feedback it needs to operate safely and within normal parameters. Running the washer in this condition risks further component damage.
How much does it cost to fix a Frigidaire washer showing E55?
The cost depends on whether you replace the board yourself or hire a technician. A replacement main control board for a Frigidaire washer typically costs in the range of $100 to $250 for the part alone. If you use a repair service, labor charges will add roughly $75 to $150 on top of the part cost, depending on your area.

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