Thermador Range Error Code 03

Error code 03 on a Thermador WFK 2401 indicates a no-drain fault. The appliance attempted to pump water out of the tub during a cycle but could not complete the process. The machine stops and displays this code to prevent further operation until the drain issue is resolved.

No, you should not continue running the washer while this code is active. The machine cannot drain water properly, which means the tub may remain filled with water. Continued use could lead to overflow, water damage, or additional stress on internal components.

A reset may temporarily clear the code, but it will return as soon as the machine attempts another drain cycle if the underlying problem has not been fixed. The fault is condition-based, meaning the control board will detect the drain failure again and re-display the code. The root cause must be corrected to permanently resolve the error.

Start by disconnecting the drain pump connector and measuring the resistance across its terminals. The reading should be close to 83 ohms. If the resistance is outside that range, replace the drain pump. If resistance is normal, check for blockages in the pump filter, impeller, and drain hose before investigating the wiring harness and control board.

If the repair requires only clearing a blockage from the pump filter or drain hose, the cost is minimal and may involve no parts at all. If the drain pump motor needs to be replaced, parts and labor costs typically range from around 150 to 350 dollars depending on your location and service provider. Control board replacement, if needed, will be on the higher end of repair costs.