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Error code reference

Fisher & Paykel Washer Error Code 41

Temperature Sensor Fault (Thermistor)

Fisher & Paykel codesFisher & Paykel washer codes

Temperature Sensor Fault (Thermistor) - The temperature sensor is measuring temperatures above 110°C, probably due to a short circuit in the sensor line.

First step from the service manual

Phase 5 and 6: Check the connection from the thermistor to the Motor Controller; check resistance (should read 12.5k ohms at 20°C / 68°F).

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

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What 41 means on a Fisher & Paykel washer

Error code 41 on a Fisher & Paykel washer indicates a Temperature Sensor Fault caused by the thermistor reporting readings above 110°C. This temperature is physically implausible under normal wash conditions and points directly to an electrical fault rather than an actual overheating event. The thermistor is a resistive temperature sensor whose resistance changes predictably with temperature. At 20°C (68°F), it should measure approximately 12.5k ohms. When the resistance drops abnormally low due to a short circuit in the sensor line, the Motor Controller interprets the signal as an extreme temperature reading and triggers this fault code.

The thermistor connects directly to the Motor Controller, and the wiring harness running between the two components is the first area to inspect. A short circuit can occur when wiring insulation is damaged, when connectors are corroded or pinched, or when the thermistor itself has failed internally. Any of these conditions will pull the signal voltage down in a way that mimics an extreme temperature reading. The diagnostic procedure focuses on Phases 5 and 6, which involve physically checking the connector at both the thermistor and the Motor Controller, and then measuring resistance across the thermistor terminals with a multimeter.

If the resistance reading is significantly below 12.5k ohms at room temperature, the thermistor has likely failed or there is a short somewhere in the wiring run. If the resistance reads correctly at the sensor but the fault persists, the issue may lie in the harness between the sensor and the Motor Controller, or in the Motor Controller itself. Resolving this fault requires systematic isolation of each segment of the circuit before replacing components.

Source: manufacturer service documentation.

Common causes of 41

  1. 01

    Failed thermistor (short circuit internal to sensor)

    Part replacement

    The thermistor itself can fail internally, causing its resistance to drop far below the expected 12.5k ohms at 20°C. Measure resistance across the sensor terminals; a reading well below 12.5k ohms at room temperature confirms the sensor has failed.

  2. 02

    Damaged or pinched wiring in the sensor harness

    Wiring / connection

    The wiring between the thermistor and the Motor Controller can become pinched, abraded, or melted, creating a short circuit along the harness run. Visually inspect the full length of the harness for insulation damage or contact with hot or sharp components.

  3. 03

    Loose or corroded connector at the Motor Controller

    Wiring / connection

    A connector that is not fully seated or has corroded terminals can create erratic low-resistance readings that the Motor Controller interprets as extreme temperatures. Check the connector at both the thermistor end and the Motor Controller end for corrosion, bent pins, or incomplete engagement.

  4. 04

    Short circuit caused by moisture or water intrusion

    Wiring / connection

    Water reaching the thermistor connector or the wiring harness can create a temporary or permanent short circuit across the sensor leads. Inspect all connectors for signs of moisture, water marks, or corrosion consistent with a water leak in the area.

  5. 05

    Faulty Motor Controller

    Part replacement

    If the thermistor resistance measures correctly at 12.5k ohms and the wiring harness shows no damage, the Motor Controller may be misreading the sensor signal due to an internal fault. This is the least common cause and should only be considered after the sensor and harness have been ruled out.

See the test procedure for each cause

Frequently asked questions about 41

What does 41 mean on a Fisher & Paykel washer?
Error code 41 is a Temperature Sensor Fault indicating the thermistor is reporting temperatures above 110°C, which is beyond any realistic wash temperature. This is almost always caused by a short circuit in the thermistor or its wiring rather than actual overheating. The Motor Controller detects the abnormal signal and stops the machine to prevent potential damage.
Can I fix Fisher & Paykel error code 41 myself?
Some causes of error code 41 are DIY-accessible. You can check the wiring harness for visible damage and inspect connectors for corrosion or loose connections without specialized tools. To confirm whether the thermistor has failed, you will need a multimeter to measure its resistance, which should read approximately 12.5k ohms at 20°C (68°F). Replacing a thermistor is a moderate-difficulty repair, while replacing the Motor Controller is more complex and may be better handled by a technician.
Is it safe to keep using my washer when error code 41 appears?
You should not continue running the washer while error code 41 is active. Although the fault is likely an electrical sensor issue rather than actual overheating, the Motor Controller cannot accurately monitor water temperature while the fault is present. Running the machine in this condition could result in water temperatures that are not properly controlled.
Will resetting my Fisher & Paykel washer clear error code 41?
A reset may temporarily clear the code, but it will return as soon as the Motor Controller reads the thermistor signal again if the underlying fault has not been corrected. The short circuit or sensor failure that triggered code 41 needs to be diagnosed and repaired for the error to stay cleared. Do not rely on repeated resets as a solution.
How much does it cost to repair Fisher & Paykel error code 41?
Repair costs depend on the root cause. A replacement thermistor is generally an inexpensive part, with parts and labor typically ranging from around $80 to $180 depending on your location and service rates. If the Motor Controller is the cause, that repair is considerably more expensive, often ranging from $200 to $450 or more including parts and labor. Getting a professional diagnosis first can help avoid replacing unnecessary components.

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