Troubleshooting a Dishwasher That Won't Start (Troubleshooting Guide)

On this page

Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

Check the power supply and door latch first. If the dishwasher has power but still won't start, reset the circuit breaker and ensure the door is fully closed. If the issue persists, test the door switch and check for error codes.

Confirm the symptom

Dishwasher doesn't power on or start cycling
No lights or sounds when attempting to start
Door is closed but dishwasher remains inactive

Tools and prep

Screwdriver (Phillips and flathead)
Multimeter for testing electrical components
Flashlight for inspecting internal parts
Rubber gloves for electrical safety
Turn off power at the circuit breaker before starting
Ensure the dishwasher is unplugged if using a portable model

Step-by-step troubleshooting

Check Power Supply
Do: Verify the dishwasher is plugged in and the circuit breaker hasn't tripped.
Observe: Power indicator lights or a functioning outlet.
Means: The dishwasher has power.
Next: If no power, check the outlet and circuit breaker.
Inspect Door Latch and Switch
Do: Close the door fully and check if the latch engages. Use a multimeter to test the door switch for continuity.
Observe: Door latch clicks into place and the door switch shows continuity.
Means: Door mechanism is working properly.
Next: If the door switch is faulty, replace it.
Reset the Dishwasher
Do: Unplug the dishwasher for 1–2 minutes or turn off the circuit breaker for the same duration.
Observe: Dishwasher resets and powers on normally.
Means: A temporary power interruption may have caused the issue.
Next: Attempt to start the dishwasher again.
Check for Error Codes
Do: Look for any error codes on the control panel or consult the user manual for code interpretation.
Observe: Error code is displayed or described in the manual.
Means: The dishwasher has a specific issue that needs attention.
Next: Refer to the manual for troubleshooting the specific error code.
Test the Control Board
Do: Visually inspect the control board for signs of damage or burn marks. Use a multimeter to test for proper voltage.
Observe: Control board shows no visible damage and receives proper voltage.
Means: Control board is likely functioning correctly.
Next: If the control board is damaged, it may need replacement.
Examine the Motor and Pump
Do: Listen for any humming or clicking sounds when attempting to start the dishwasher.
Observe: No unusual sounds or motor activity.
Means: Motor or pump may be faulty.
Next: Further inspection or professional help may be needed.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Power Supply Issues The dishwasher may not start if it's not receiving power from the outlet or circuit breaker.	Common	Easy	None
Faulty Door Switch A malfunctioning door switch prevents the dishwasher from starting if the door isn't properly latched.	Common	Easy–Medium	Door Switch
Control Board Malfunction A damaged or faulty control board can prevent the dishwasher from receiving start signals.	Sometimes	Medium	Control Board
Reset Required A temporary power surge or glitch may require a reset to restore normal operation.	Sometimes	Easy	None
Blocked or Faulty Motor A jammed or defective motor can prevent the dishwasher from starting.	Rare	Hard	Motor or Pump Assembly
Water Inlet Valve Issues A faulty water inlet valve may not allow water to enter, preventing the cycle from starting.	Rare	Medium	Water Inlet Valve

Parts matching

If you need to replace parts, match your symptoms to the most likely components:

Faulty door switch – if the dishwasher doesn't start when the door is closed
Control board issues – if there are no error codes and the dishwasher doesn't respond
Water inlet valve – if the dishwasher doesn't fill with water
Motor or pump assembly – if there's no noise or activity when starting

Always turn off the power before replacing any parts to avoid electrical hazards.

When to call a professional

If you're not comfortable working with electrical components
If the dishwasher still won't start after following all troubleshooting steps
If the control board or motor needs replacement
If error codes persist or indicate a complex issue

FAQ

Why won't my dishwasher start even though it's plugged in?

Check the circuit breaker to ensure it hasn't tripped. Also, test the outlet with another appliance to confirm it's working.

How do I reset my dishwasher?

Unplug the dishwasher for 1–2 minutes or turn off the circuit breaker for the same duration, then restore power and try starting it again.

What should I do if the door switch is faulty?

Replace the door switch with a compatible model. Ensure the power is off before attempting the replacement.

Can a bad water inlet valve prevent the dishwasher from starting?

Yes, if the water inlet valve is faulty, the dishwasher may not fill with water, preventing the cycle from starting. Test the valve or replace it if necessary.