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Error code reference

Fisher & Paykel Dishwasher Error Code F86

Motor bridge failure on the motor controller.

Fisher & Paykel codesFisher & Paykel dishwasher codes

Motor bridge failure on the motor controller.

First step from the service manual

Replace the motor controller.

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

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What F86 means on a Fisher & Paykel dishwasher

The F86 error code on a Fisher & Paykel dishwasher indicates a motor bridge failure within the motor controller. The motor controller contains an H-bridge circuit, a configuration of transistors or MOSFETs that controls the direction and speed of the wash motor by switching current flow. When this bridge circuit fails, the controller loses the ability to properly drive the motor, halting wash and drain functions entirely.

Motor bridge failures are typically caused by internal component breakdown within the motor controller itself. The switching transistors or MOSFETs in the bridge circuit can fail due to voltage spikes, overheating, or simply component fatigue over time. A shorted or seized wash motor can also draw excessive current through the bridge, destroying the switching components. In either case, the fault is detected internally by the controller's protection circuitry, which then triggers the F86 code.

Because the failure is seated within the motor controller's internal circuitry, the diagnostic path leads directly to replacing the motor controller assembly rather than attempting component-level repair. Before replacement, it is worth confirming the wash motor itself spins freely and is not shorted, as a failed motor can take out a new controller if left unaddressed. If the motor checks out mechanically and electrically, replacing the motor controller is the correct corrective action.

Source: manufacturer service documentation.

Common causes of F86

  1. 01

    Failed motor controller H-bridge circuit

    Part replacement

    The switching transistors or MOSFETs inside the motor controller have broken down internally, which is the most direct cause of an F86 fault. The controller must be replaced as a unit.

  2. 02

    Voltage spike damage to the controller

    Part replacement

    Power surges or voltage transients on the supply line can destroy the bridge switching components inside the motor controller. Check for signs of burn marks or component damage on the board.

  3. 03

    Shorted or seized wash motor

    Part replacement

    A wash motor drawing excessive current due to a short or mechanical seizure can overload and burn out the bridge circuit in the controller. Verify the motor spins freely and check its winding resistance before installing a new controller.

  4. 04

    Overheating of the motor controller

    Part replacement

    Prolonged operation under high load or restricted ventilation can cause thermal failure of the bridge components. Inspect the controller for heat discoloration or damaged solder joints.

See the test procedure for each cause

Frequently asked questions about F86

What does F86 mean on a Fisher & Paykel dishwasher?
F86 indicates a motor bridge failure on the motor controller. The H-bridge circuit inside the controller, which is responsible for driving the wash motor, has failed. This prevents the dishwasher from running its wash or drain cycles. Replacing the motor controller is the prescribed corrective action.
Can I fix an F86 error myself on a Fisher & Paykel dishwasher?
The repair requires replacing the motor controller, which involves working with line voltage components and disassembling the dishwasher's control systems. Knowledgeable DIYers who are comfortable with appliance electrical work can perform this replacement, but those unfamiliar with appliance repair should hire a qualified technician. Before replacing the controller, confirm the wash motor is not seized or shorted, as a faulty motor can damage a new controller.
Is it safe to use my Fisher & Paykel dishwasher when it shows an F86 error?
No, the dishwasher should not be operated while displaying an F86 error. The motor controller failure means the wash motor cannot be properly controlled, so the appliance will not complete cycles. Attempting to run it repeatedly could stress other components or pose an electrical risk.
Will resetting my Fisher & Paykel dishwasher clear the F86 error?
A power reset is unlikely to permanently clear an F86 error because it points to a hardware failure in the motor controller rather than a temporary software or communication fault. The code may disappear briefly after a reset but will return once the appliance attempts to drive the motor. The motor controller needs to be physically replaced to resolve the fault.
How much does it cost to repair an F86 error on a Fisher & Paykel dishwasher?
Repair costs depend on the price of the motor controller part and local labor rates. Parts alone can range from around $80 to $250 or more depending on the specific model, and professional labor charges typically add $100 to $200 on top of that. Getting a quote from a Fisher & Paykel authorized service provider before proceeding is recommended.

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