Thermador Range Error Code F

The F code on a Thermador range refers specifically to a dishwasher water level or filling error. It activates when the dishwasher detects that the tub received too little water, too much water, or that water has accumulated in the base pan beneath the tub. The code halts the cycle to prevent damage and requires the underlying cause to be identified and corrected before normal operation can resume.

The F code will clear itself 15 minutes after the dishwasher is powered on, or by running the built-in diagnostic program, but only after the root cause has been resolved. If the underlying water level problem is not addressed, the error will return as soon as the next cycle begins. Resetting alone without fixing the cause is not a permanent solution.

Repair costs depend on the cause. Clearing a kinked supply line or adjusting the shutoff valve costs nothing. Replacing a water inlet valve typically ranges from $75 to $200 including parts and labor. Repairing a leak involving a door gasket, pump seal, or hose connection can range from $100 to $350 or more, depending on the component and the labor involved. A faulty water level sensor or pressure switch replacement generally falls in the $80 to $200 range.

Start by identifying which of the three fault conditions applies: underfill, overfill, or water in the base. Check the water supply line for kinks, verify the shutoff valve is fully open, inspect the door gasket and hose connections for leaks, and look for standing water in the base pan. Once the cause is corrected, the code will reset on its own 15 minutes after the dishwasher is turned on, or you can run the diagnostic program to clear it sooner.

The water-in-base condition associated with this code can indicate an active internal leak, which warrants prompt attention. Allowing water to accumulate in the base pan can lead to motor or component damage over time. If you suspect a leak, avoid running the dishwasher until the source has been identified and repaired.