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Error code reference

Fisher & Paykel Washer Error Code 5

Phase 1: Communications fault

Fisher & Paykel codesFisher & Paykel washer codes

Phase 1: Communications fault - Display Module has had difficulty communicating with the Motor Control Module.

First step from the service manual

Turn off at the wall and on again after 5 seconds. Check 12 way harness connections for bad contacts/corrosion.

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

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What 5 means on a Fisher & Paykel washer

Error code 5 on a Fisher & Paykel washer indicates a Phase 1 communications fault, meaning the Display Module has lost reliable communication with the Motor Control Module (MCM). These two modules work together continuously during operation: the Display Module sends commands and the MCM returns status data over a dedicated communication circuit. When that data exchange breaks down or becomes inconsistent, the machine logs code 5 and halts to prevent uncontrolled motor operation.

The most common root cause is a problem with the 12-way wiring harness that connects the Display Module to the Motor Control Module. This harness carries both power and serial communication signals, so corroded pins, loose connector seats, or damaged wiring can corrupt the data signal enough to trigger the fault. Vibration from normal wash cycles can gradually loosen connectors over time, making the fault intermittent at first before it becomes persistent.

In some cases the fault points to a failed component rather than a wiring issue. If the harness and connectors check out clean and seated correctly, either the Display Module or the Motor Control Module itself may have an internal failure preventing proper communication. A power cycle clears temporary signal errors caused by electrical noise or brief voltage fluctuations, which is why a 5-second power-off reset is the first recommended step before pursuing deeper diagnostics.

Source: manufacturer service documentation.

Common causes of 5

  1. 01

    Loose or poorly seated 12-way harness connector

    Wiring / connection

    The 12-way connector linking the Display Module to the Motor Control Module may have worked loose due to machine vibration. Inspect both ends of the harness, press the connectors firmly until they click, and check that no pins have backed out of the housing.

  2. 02

    Corroded or contaminated connector pins

    Wiring / connection

    Moisture and detergent residue can cause oxidation on the 12-way harness pins, increasing resistance in the communication circuit. Look for green or white discoloration on the pins and clean with an appropriate electrical contact cleaner.

  3. 03

    Damaged wiring in the 12-way harness

    Part replacement

    Chafed, pinched, or broken wires within the harness can interrupt the communication signal even when the connectors appear seated correctly. Flex the harness along its length while checking for continuity to locate any intermittent breaks.

  4. 04

    Failed Motor Control Module

    Part replacement

    If the harness and connectors are in good condition, the Motor Control Module itself may have an internal fault preventing it from responding to the Display Module. This requires module replacement.

  5. 05

    Failed Display Module

    Part replacement

    Less commonly, the Display Module can fail internally and be unable to initiate or maintain the communication sequence with the MCM. If the MCM tests correctly, the Display Module should be evaluated as the fault source.

See the test procedure for each cause

Frequently asked questions about 5

What does 5 mean on a Fisher & Paykel washer?
Error code 5 is a Phase 1 communications fault indicating the Display Module has had difficulty communicating with the Motor Control Module. The two modules exchange data continuously during operation, and when that link is disrupted the machine stops and displays code 5. The most likely cause is a problem with the 12-way wiring harness connecting the two modules, such as a loose connector or corroded pins.
Will resetting the washer clear error code 5?
A reset by turning the machine off at the wall and waiting 5 seconds can clear the fault if it was caused by a temporary communication glitch or electrical noise. If the code returns after the reset, there is an underlying wiring or component problem that needs to be diagnosed and repaired before the machine will run normally.
How do I fix error code 5 on my Fisher & Paykel washer?
Start with a 5-second power cycle at the wall outlet. If the code returns, locate and inspect the 12-way harness that runs between the Display Module and the Motor Control Module, checking for loose connectors, corroded pins, and any visible wire damage. Clean or reseat connections as needed. If the harness is intact, further diagnosis should focus on whether the Motor Control Module or Display Module has an internal failure requiring replacement.
Is it safe to keep using my washer when error code 5 appears?
The machine will typically halt operation when code 5 is active, which prevents uncontrolled motor behavior. You should not attempt to bypass or force the machine to run while this fault is present. Address the communication fault before resuming normal use to avoid potential damage to the motor or control electronics.
How much does it cost to repair error code 5 on a Fisher & Paykel washer?
If the fix is simply reseating or cleaning the 12-way harness connectors, there may be no parts cost and only a service call fee, typically in the range of $75 to $150 depending on your location. If the harness itself needs replacement, expect to add $30 to $80 for the part. Replacing a Motor Control Module or Display Module is more involved, with parts and labor commonly ranging from $200 to $450 depending on the specific module and technician rates in your area.

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