Dacor Range, Oven, Cooktop Error Code F3

On a Dacor Classic 30" dishwasher, F3 indicates a communication failure between the control board and the power board. The dishwasher disables itself and flashes F3 on the display when this link is broken. The cause can be a faulty wire harness, incompatible boards, or a failed board. A technician will need to inspect the harness and boards to diagnose the issue.

A power reset may temporarily clear the display, but the F3 error will return if the underlying communication fault between the control board and power board has not been repaired. A reset does not fix a damaged harness or a failed board. The dishwasher will continue to disable itself until the root cause is addressed.

Repair costs vary depending on what component has failed. If only the wire harness needs replacement or reseating, costs are generally lower, typically in the range of $75 to $200 for parts and labor. Replacing one or both boards is more expensive, with total repair costs potentially ranging from $200 to $500 or more depending on parts pricing and labor rates in your area.

A basic inspection of the wire harness connectors between the control and power boards is something a confident DIYer can attempt after disconnecting power to the unit. However, diagnosing board compatibility or a failed board typically requires technical knowledge and access to the correct replacement parts. If the harness appears intact, professional service is recommended to avoid purchasing unnecessary components.

When the F3 code is active, the dishwasher disables itself and will not operate, so running a cycle is not possible until the fault is cleared. This shutdown behavior is a built-in protection measure. You should not attempt to bypass the error, and the unit should be serviced before returning it to use.