Common LG dishwasher parts that need replacement
- Detergent dispenser. The detergent dispenser is on the inner door panel and holds the dishwasher detergent in a covered compartment. The cover of the dishwasher dispenser has a latch controlled by the timer or electronic control board in the console. The latch releases to open the cover and dispense the dishwasher detergent at the right time during the dishwashing cycle. Replace the detergent dispenser if it doesn't open when triggered by the control.
- Door latch assembly. The door latch assembly is at the top of the dishwasher door. It has a catch that engages the strike when the door is closed so the door won't open during the dishwashing cycle. A handle mechanism on the latch assembly, or switch assembly, allows the catch to release the door strike so you can open the door after the cycle is finished, or during the cycle if necessary. This assembly includes the microswitch that detects whether the dishwasher door is shut and latched properly. The dishwasher won't start unless the control detects that the door is properly closed. Replace the door latch assembly if it's damaged or its switch doesn't accurately detect whether the door is closed.
- Door seal. The door seal, or door gasket, seals the gap between the opening to the dishwasher tub and the outer edge of the dishwasher door. Replace the door seal if it's damaged and water leaks through the door opening.
- Drain pump. A drain pump removes the water from the dishwasher tub during the drain portion of the wash and rinse cycles. Replace the drain pump if it doesn't run during the drain portion of the cycle.
How to troubleshoot your LG dishwasher when it won't fill with water
First, make sure that the water supply cut-off valve is open. Next, unplug the dishwasher and shut off the water supply, and then check the inlet screen on the water inlet valve for a clog. Replace the water valve if you find the screen clogged. Debris from the clogged screen can get into the valve body, causing the valve to stick open and possibly flood your kitchen.
A failed electronic control board or timer could also prevent the dishwasher from filling.