Fisher & Paykel Dishwasher Error Code F85

F85 indicates a bridge temperature sensor fault on the motor controller. The motor controller has an internal sensor that monitors the thermal condition of its power switching components, and the dishwasher's control system has detected that this sensor is reporting an invalid or out-of-range value. The dishwasher stops operation to prevent potential damage to the drive electronics.

A power reset may temporarily clear the fault display, but if the motor controller's bridge temperature sensor has genuinely failed, the F85 code will return once the dishwasher attempts to run. Resetting is a reasonable first step to check whether the fault is intermittent, but it is not a fix for an underlying controller failure.

Repair costs vary depending on parts availability and labor rates in your area. Motor controller replacement parts typically range from around $150 to $350 or more depending on the specific model. Adding professional labor, total repair costs commonly fall between $250 and $550. Getting a quote from a service technician before proceeding is recommended.

The required repair is replacement of the motor controller, which involves disconnecting and reconnecting electrical harnesses inside the dishwasher cabinet. A knowledgeable DIYer comfortable with appliance electrical work may be able to perform this, but sourcing the correct controller part and safely accessing the component can be challenging. If you are unsure about working with appliance electronics, a qualified technician is the safer option.

Running the dishwasher while F85 is active is not advisable. The bridge temperature sensor is a protective component, and operating without a valid thermal reading removes a safeguard against motor controller overheating. Continued use could cause additional damage to the motor drive electronics and increase repair costs.