You should replace your motor as soon as possible. If you’ve noticed loud humming sounds coming from the motor during previous wash cycles, this indicates a failing motor. If the dishwasher won’t start after the start relay sends power to the motor, your drive motor could be defective. Replace your drive motor-The dishwasher drive motor circulates water during a wash cycle to clean the items during a cycle.If the thermal fuse is blown, it will have to be replaced. Open the access door panel and locate the thermal fuse at the top of the circuit board-it will have two wires attached to it. Assess the thermal fuse -When the thermal fuse fails, the control board won’t receive any power and the dishwasher won’t start.The coil portion of the relay should show continuity at all times while the switch contact portion should only show continuity when activated. Locate the part next to the motor and use a multimeter to check for continuity. Check the motor start relay -If your dishwasher won’t turn on and you’ve verified that it’s receiving power, the motor start relay may be defective.Check to see if more than one button has been pressed at the same time-if more than one button has been pushed, this will create a no continuity situation for your switch and bring no power to these controls. Locate the selector switch on the control panel and make sure it’s not stuck between settings.
If defective or not depressed correctly, the selector switch could be the cause of your dishwasher not starting. Check the selector switch -A selector switch allows you to choose different washing, drying, and heating options for a wash cycle.Turn off the power before checking the timer or electric control with a multimeter. If these parts don’t get the power they need, they won’t work properly.
These parts are responsible for how much power is sent to each component of your dishwasher, like the drain pump, heating circuit, and water inlet valve, during a wash cycle. Assess the timer and electronic control -After you’ve ensured that the door latches properly, look at the timer or electronic control.
You can also use a multimeter to check for continuity, but make sure the power to the dishwasher is turned off. Locate the door switch at the top of the dishwasher door and check that both switches are mechanically activated when the door closes. If the dishwasher door isn’t closed properly, the dishwasher won’t receive power to complete a wash cycle. It also houses the door latch switch that provides power to the dishwasher controls. Ensure the door latch is working properly -The door latch assembly holds the door closed during a wash cycle to prevent water from leaking.Wait until the drain cycle is complete and try starting your dishwasher. While pressing the start button once starts the cycle, pressing it again resets the dishwasher and runs a drain cycle for 90 seconds. Reset the dishwasher -If your dishwasher won’t start but the lights are on, the start button may have been pressed more than once.
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Check your owner’s manual and make sure the child lock settings are turned off.
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Use this guide to help you troubleshoot major parts of a dishwasher and determine when professional help is necessary. Repairing a dishwasher isn’t as difficult as it might seem and can be done even if you aren’t particularly handy. If your dishwasher won’t start, save time and money by troubleshooting it before calling a professional.
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