Dishwasher: Won't start
You fill the dishwasher with dishes and shut the door but the dishwasher doesn't start. The first step is to deduce what is keeping the dishwasher from running.
View these troubleshooting videos to help you find out why the dishwasher won't start.
These repairs may help solve your Dishwasher problem:
Replace the dishwasher door latch assembly
The dishwasher won't start if the door isn't completely shut and latched. If the door doesn't latch shut, replace the latch mechanism. Even if the door latches fully, a problem with micro-switch in the door latch/switch assembly could keep the dishwasher from starting; in that case, replace the micro-switch.
Replace the dishwasher thermal fuse
If the dishwasher is dead—the control panel has doesn't light up even though the dishwasher receives electrical power supplied to it—the thermal fuse could be blown. On some models, the control panel lights up event when the thermal fuse is blown, but the dishwasher won't start. Replace the thermal fuse if it's blown. Sometimes the wire harness for the fuse also needs to be repaired or replaced.
Replace the dishwasher control panel
When the control panel, also called the control console, becomes visibly loose or damaged, replace it. A stuck button can also cause the dishwasher to become unresponsive. A light may flash constantly on the control panel when a button is stuck.
Replace the user interface control
The user interface control houses the selection buttons and display information such as the remaining cycle time. A defective user interface control won't light up or won't respond when you press its buttons. Because it's difficult to pinpoint the user interface control as the source of the problem when it won't light up or respond when you press its buttons, refer to the tech sheet for diagnostic tests (its' usually behind the service panel below the door) or have a service technician test the control. Replace the user interface control if it's defective.
Replace the dishwasher bi-metal thermal fuse
The bi-metal thermal fuse protects the electronic control board and other components from a power surge. The fuse blows if there's a short to the metal cabinet or a short circuit in the wire harness of the dishwasher. A failed component can also cause the thermal fuse to blow. If the dishwasher control is completely dead even though electrical power is supplied to the dishwasher, the thermal fuse could be blown and should be replaced.
Replace the dishwasher electronic control board
The electronic control board runs all dishwasher functions. If the electronic control board is getting voltage, but not operating properly, it should be replaced.
Replace the dishwasher timer
The timer controls the electro-mechanical components in the dishwasher such as the wash pump, drain pump, inlet water valve and heating element. The timer also advances the control knob on the control panel. Replace the timer if it fails to start and stop the components properly or fails to advance the control knob.
Replace the dishwasher water inlet valve
The water inlet valve, also called a solenoid fill valve, controls the flow of water into the dishwasher by opening and closing. If the water inlet valve doesn't open at all, water can't flow into the dishwasher. If it opens partially, the dishwasher won’t fill adequately, and the water level will be low—a noisy pump is one indication that the water level is low. Conversely, if the water inlet valve won’t close, water fills the dishwasher tub even when the dishwasher is off. If the water inlet valve doesn't open or close correctly, repair or replace it.
Replace the dishwasher power supply control board
Some models of dishwashers have a separate power supply control board that supplies electrical power to the logic board. If the logic control board or the components are not getting power, then the power supply control board should be replaced.
Replace the dishwasher cycle selector switch assembly
Some dishwasher control panels have cycle selector switches. The dishwasher usually uses an electro-mechanical timer (as opposed to an electronic control board) when cycle selector switches are used on the control panel. If a selector switch won't turn on or off, then the cycle selector switch assembly should be replaced.