Whirlpool Dishwasher Error Code F4

F4 indicates a drain system fault. The control board ran the drain pump for 4 minutes but the water presence indicator (WI) continued to report that water was still detected in the tub. The fault can originate from a blocked siphon or drain hose, a defective drain pump, a faulty WI or OWL sensor, or a failed control board.

A reset may temporarily clear the F4 code, but it will return the next time the dishwasher attempts a drain cycle if the underlying problem has not been resolved. A reset is useful for confirming whether the fault is intermittent, but it is not a fix for a mechanical or electrical failure in the drain system.

Repair costs vary depending on which component has failed. Clearing a simple drain blockage yourself costs little to nothing, while replacing a drain pump typically ranges from $80 to $200 including parts and labor. A new control board is generally the most expensive repair, often ranging from $150 to $350 or more depending on the specific model and whether a technician is hired.

Start by checking the drain path for blockages, including the siphon, drain hose, and any air gap fitting. Next, inspect the drain pump impeller for debris or damage. If the drain path and pump are clear, test the water presence indicator and OWL sensor for correct operation. If all components check out, the control board may need to be evaluated or replaced.

It is not recommended to continue running the dishwasher with an active F4 code. If the drain system is not functioning properly, water may remain in the tub, which can lead to odors, potential leaks, or additional component stress. Address the fault before running further cycles.