Miele Dishwasher Error Code F3

F3 on a Miele dishwasher is an electronics fault code indicating the control board could not recognize the position of the program selector switch. This prevents the dishwasher from knowing which wash cycle to run. The fault can be caused by a defective selector switch, a wiring issue, or in some cases a failed control board. The appliance will not operate normally until the fault is resolved.

A power reset by turning off the dishwasher at the circuit breaker for a few minutes may temporarily clear F3 if the fault was caused by a transient signal glitch. However, if there is an underlying hardware problem such as a worn selector switch, damaged wiring, or a faulty control board, the error will return. A reset alone is not a fix and should be followed by proper diagnosis if the code comes back.

Repair costs vary depending on the root cause. If only a wiring connector needs reseating or cleaning, the cost may be limited to a service call fee, typically in the range of $80 to $150. Replacing the program selector switch generally adds $50 to $150 in parts. If the main control board is at fault, parts alone can range from $150 to $400 or more, and total repair costs including labor can be substantial. Getting a diagnostic assessment before authorizing parts replacement is advisable.

Some causes of F3 are DIY-accessible, such as reseating a loose connector or cleaning corroded terminals on the selector switch harness. However, replacing the selector switch or the control board requires disassembly of the door panel and working with electrical components, which is best approached only if you are comfortable with appliance repair. If you are unsure, a qualified technician should handle the diagnosis and repair.

You should not attempt to run the dishwasher while F3 is active. Because the control board cannot identify the selected program, the appliance may not operate the wash cycle correctly or may refuse to start altogether. Continuing to attempt operation without resolving the underlying fault risks further damage to the electronics.