Dishwashers: Won't start

Before replacing any parts: (1) Drain water by operating the drain pump, (2) Close the water supply valve, (3) Turn off the power and disconnect the power cable — you must turn off the circuit breaker connected to the product, (4) Pull out the unit from the sink and lay it on the floor — be careful of the drain hose when pulling out.

When removing the Main PBA, lift the board up carefully because it is hanging on the PBA case by two hooks. If you pull without lifting first, you can crack the board or break the hooks.

Both Main PBA and Sub PBA version codes are displayed in BCD (binary-coded decimal) format using four LEDs: Auto=8, Normal=4, Heavy=2, Express=1. For example, Auto+Heavy+Express LEDs on = code B (8+2+1=11). The code and software version alternate display at 1Hz.

If the unit powers on but no cycle buttons respond, check for active Control Lock before assuming a PCB or button panel fault. Control Lock is activated by holding Half Load + Energy Saver for 3 seconds (most models), or Dual Zone for 3 seconds (LDF554** before 705XX serial). Deactivate using the same method.