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Parts by Appliance
Home > Repair Help > Dishwasher Repair Help > Dishwasher won't start

Dishwasher won't start

The most common parts and conditions which contribute to the symptom "Dishwasher Won’t Start " are listed below. Check or test these items and use the available how to links to learn more.


Enter your model number in the search bar above to find parts for your dishwasher.









Hard Water

Hard water will result in the soap not dissolving well and the dishes will have a film on them. Even the use of commercial products designed to remove the spots will not improve performance in this situation. Have your water hardness checked for quality.







Burnt or Broken Wires
Check for burnt or broken wires. This includes the wires on the timer and door switch. Also check the wiring connection where the main power connects to the machine.










The timer is a series of switches that controls all machine functions. If one of the contacts in the timer is defective, the machine will lose that function. Knowledge of the the use of a volt/ohm meter is essential to testing the timer as well as the ability to read the timer sequence chart that is supplied with the machine. In most cases this requires a professional technician.









Door Switch

The door switch is wired in series with all components on the machine. If the door switch is defective, the machine will do nothing. Check the door switch for continuity.










Motor Start Relay
The motor start relay is located on the pump motor on some models. IT supplies power to the motor, so if you know that you are getting power from the control circuit to the motor, the motor start relay may be your problem. Check it for continuity.









Thermal Fuse
The thermal fuse is located on the top side of the circut board.  If the thermal fuse fails, the control board will not recieve power and the dishwasher will not start.









Drive Motor
The drive motor circulates the water through the dishwasher.  The timer tells the start relay to the the motor to run. If the dishwasher won't start after the start relay sends power to the motor, the drive motor may be defective.  If you hear a loud humming noise coming from the motor, it may be defective.










Warning: Read First!

Attempting to work on appliances that have live energy sources can lead  to serious bodily injury or even death. To prevent such injuries, always remove the appliance from its power source before ...

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