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Error code reference

Maytag Washer Error Code F51

Motor RPS Failure

Maytag codesMaytag washer codes

Motor RPS Failure – motor rotor position sensor (RPS) failure or lower harness problem.

First step from the service manual

See TEST #3, page 4.

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

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What F51 means on a Maytag washer

The F51 error code on a Maytag washer indicates a Motor Rotor Position Sensor (RPS) failure. The RPS is a Hall-effect sensor mounted near the motor rotor that continuously monitors the rotor's position and speed during the wash cycle. This feedback is critical for the motor control board to properly regulate spin speed, direction changes, and torque output. When the control board loses a valid signal from the RPS, or detects an out-of-range reading, it triggers the F51 fault and halts operation.

The failure can originate from two primary areas: the RPS sensor itself, or the lower wiring harness that connects the sensor to the motor control board. Connector corrosion, pinched wires, and loose terminals in the lower harness are frequent culprits, particularly in machines exposed to moisture or vibration over time. A failed or intermittently failing rotor position sensor will also produce this code directly.

Diagnosis should begin with the procedure outlined in TEST #3, which covers systematic checks of the sensor signal, wiring continuity, and connector integrity throughout the lower harness circuit. Technicians should inspect all connectors between the RPS and the control board for corrosion or backed-out pins before condemning the sensor or motor assembly. Addressing harness issues first is the most cost-effective approach, since sensor and motor replacements carry a higher parts cost.

Source: manufacturer service documentation.

Common causes of F51

  1. 01

    Loose or corroded lower harness connector

    Wiring / connection

    Vibration and moisture can cause the wiring connectors in the lower harness to loosen or corrode, breaking the signal between the RPS and the control board. Inspect all connectors along the lower harness for discoloration, pin damage, or a loose fit.

  2. 02

    Damaged lower wiring harness

    Part replacement

    Wires in the lower harness can become pinched, chafed, or broken due to machine vibration or improper routing. A continuity check along each wire in the harness will reveal any open circuits or shorts.

  3. 03

    Failed rotor position sensor (RPS)

    Part replacement

    The RPS itself can fail internally, producing no signal or an erratic signal to the control board. If harness and connector checks pass, the sensor should be tested per TEST #3 and replaced if readings are out of specification.

  4. 04

    Motor control board fault

    Part replacement

    In some cases the motor control board loses the ability to correctly read or interpret the RPS signal even when the sensor and harness are intact. This is typically considered after all wiring and sensor components have been ruled out.

See the test procedure for each cause

Frequently asked questions about F51

What does F51 mean on a Maytag washer?
F51 on a Maytag washer indicates a Motor Rotor Position Sensor (RPS) failure or a problem with the lower wiring harness connected to that sensor. The RPS monitors the motor rotor's position and speed, and the control board uses that data to run the motor correctly. When the signal is missing or invalid, the washer stops and displays F51. Diagnosis should follow the TEST #3 procedure to isolate whether the fault is in the sensor, the harness, or its connectors.
Can I fix an F51 error myself on a Maytag washer?
A knowledgeable DIYer can address some F51 causes, particularly loose or corroded harness connectors, without professional help. Inspecting and reseating connectors along the lower harness requires basic mechanical aptitude and no special tools. However, if the rotor position sensor or motor control board needs replacement, comfort with appliance disassembly and electrical testing is necessary. When in doubt, a qualified technician should perform TEST #3 to correctly identify the faulty component.
Is it safe to keep using my Maytag washer when F51 appears?
It is not advisable to continue using the washer while F51 is active. The washer has stopped operation specifically because motor control has been compromised, and running it in this state could cause further damage to the motor or associated components. Resolve the underlying fault before resuming use.
How much does it cost to repair an F51 error on a Maytag washer?
Repair costs vary depending on the root cause. If the issue is simply a loose or corroded connector, the repair may cost little to nothing beyond diagnostic time. Replacing the rotor position sensor typically runs in the range of $30 to $80 for the part alone, while a motor control board replacement can range from $100 to $250 or more for parts. Adding professional labor will increase total costs depending on your area and service provider.
Will resetting my Maytag washer clear the F51 error code?
A power reset may temporarily clear the F51 code, but it will almost certainly return if the underlying problem with the rotor position sensor or lower harness has not been corrected. Resetting without performing a proper diagnosis only delays the repair and risks further component damage. The fault should be properly diagnosed and resolved using the TEST #3 procedure before relying on the machine again.

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