If the thermal fuse blows, it will prevent the dishwasher from starting. To determine if the thermal fuse is defective, use a multimeter to test the fuse for continuity. ... If the door does not latch properly, the door switch might prevent the dishwasher from running. If the door latch is broken, replace it.
How do I power cycle my LG dishwasher?
Press the POWER button to turn the dishwasher off. Turn the circuit breaker to the dishwasher OFF and wait 10 seconds. Turn the circuit breaker to the dishwasher back ON. Press the POWER button to turn the dishwasher ON, and start a new cycle.Jul 3, 2019