Whirlpool has been making appliances since 1908, starting with washing machines, then incorporating dryers, mixers, dishwashers and more. When you buy a dishwasher, your owner's manual will tell you how to use the machine and how to troubleshoot basic problems. However, error codes, used by plumbers and technicians to diagnose serious problems, are not included. Knowing the error codes can help you determine what kind of professional assistance you need.
If one of the dishwasher's keys becomes stuck in the depressed position, your dishwasher will suspend operation and the control will flash the LED connected to that key, according to the Whirlpool manual. If more than one key is stuck, or if a key without an LED is stuck, the control will flash the lockout LED, the manual states.
F1 is a temperature problem, indicating a faulty temperature sensor or that the water is becoming too hot or too cold. This error (or fault) code is known as an NTC Break.
F2 indicates a water leak. When a leak occurs, it trips the float device by dumping water into the dishwasher's base. The incoming water valve will be switched off, and the drain pump will turn on until the sump is empty.
F3 means the heating cycle is not working properly. If the heater is working too slowly, there is an open circuit or the control is defective, the F3 code will occur.
F4 indicates a drain failure in your dishwasher. It will flash if the sump is not empty of water, if the pump has run for more than four minutes or if the electronic control PCB is defective.
F6 occurs when the water tap is not open. The flow meter is not recording water coming into the machine. This can be caused by a closed tap, kinked hose or a defective solenoid valve.
F7 is an error showing flow meter failure. The flow meter impulse wheel, found within the water tank, is not working correctly.
F8 indicates there is not enough water during the cycle. It also may mean the suds level is too high, which can affect the water indicator, or it can be caused by low water pressure.
F9 means your dishwasher is filling with too much water. It can be caused by an open water valve or by a defective electronic control PCB.