Fisher & Paykel Dishwasher Error Code F87

The F87 error code on a Fisher & Paykel dishwasher indicates a motor controller current sense error. This means the motor controller's internal current sensing circuit has detected an abnormal or unreadable current signal during operation. The motor controller is responsible for regulating the power delivered to the wash motor, and it continuously monitors current draw to protect both the motor and the control electronics. When the current sense feedback falls outside expected parameters, or the sensing circuit itself fails, the controller triggers this fault code and halts operation.

Current sense errors typically originate within the motor controller itself rather than in the wash motor or wiring harness. The current sensing function relies on precision components inside the controller, such as shunt resistors or sense amplifiers, which can fail due to power surges, overheating, or component aging. In some cases, a short circuit or overload condition in the motor circuit may have already damaged the sensing circuitry prior to the fault appearing.

Because the fault is localized to the motor controller's internal sensing circuit, the primary diagnostic action is direct replacement of the motor controller. Attempting to repair the controller at the component level is generally not practical in a field service context. Technicians should also inspect the motor wiring harness for any visible damage or corrosion before installing a replacement controller, to ensure the new unit is not exposed to the same fault conditions that may have caused the original failure.