Why Isn't My Dishwasher Starting (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

Ensure the dishwasher is receiving power, the door is fully closed and latched, and there are no error codes displayed. If these checks don't resolve the issue, the problem may be with the door switch, control board, or water supply.

Confirm the symptom

Dishwasher door closes but doesn't start
No power indicator lights or sounds
Control panel is unresponsive

Tools and prep

Screwdriver set
Multimeter (optional)
Owner's manual
Flashlight
Rubber gloves
Turn off power at the circuit breaker for safety

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 sounds when door is closed.
Means: Power is active; issue may be elsewhere.
Next: Check door latch and switch
Check Door Latch and Switch
Do: Ensure the door is fully closed and the latch is secure. Test the door switch with a multimeter if available.
Observe: Door latch clicks and switch completes the circuit.
Means: Door mechanism is functional.
Next: Inspect control panel
Inspect Control Panel
Do: Look for error codes or unlit buttons. Press the 'Start' button to see if it responds.
Observe: Control panel displays error code or lights up.
Means: Control panel may be faulty or needs resetting.
Next: Check water supply
Check Water Supply
Do: Ensure the water inlet valve is open and the water supply to the house is on.
Observe: Water flows to the dishwasher when the valve is open.
Means: Water supply is active.
Next: Test for error codes
Test for Error Codes
Do: Consult the owner's manual to interpret any error codes displayed on the control panel.
Observe: Error code corresponds to a specific issue.
Means: Error code provides a direct diagnosis.
Next: Call a professional if unresolved
Call a Professional
Do: If previous steps don't resolve the issue, contact a licensed appliance repair technician.
Observe: Professional diagnosis and repair.
Means: Issue is likely complex and requires expert attention.
Next: None

Common causes

Cause	Likelihood	Difficulty	Part often needed
Power outage or tripped circuit breaker Dishwasher requires a stable power source to operate.	Common	Easy	None
Faulty door switch The door switch must close the circuit to allow the dishwasher to start.	Common	Easy–Medium	Door switch
Malfunctioning control panel A faulty control panel can prevent the dishwasher from starting or responding to inputs.	Sometimes	Medium	Control panel
Blocked water supply Dishwasher needs water to initiate the wash cycle.	Sometimes	Easy	Water inlet valve
Faulty water inlet valve The valve may not be opening to allow water into the dishwasher.	Sometimes	Medium	Water inlet valve
Overloaded dishwasher Excessive dishes can prevent the door from closing properly or trigger a safety lockout.	Rare	Easy	None
Internal wiring issue Loose or damaged wiring can disrupt power to the control board.	Rare	Hard	Professional repair

Parts matching

If you need to replace a part, match your symptoms to the most likely component:

No power: Check circuit breaker first; if tripped, reset it. If not, inspect wiring or call a pro.
Door won't latch: Replace door switch if testing confirms it's faulty.
Control panel unresponsive: Replace control panel if no error codes and no response to inputs.
No water entering: Replace water inlet valve if valve is closed or faulty.
Error code displayed: Refer to manual for code meaning and replace the indicated part.

Always disconnect power before inspecting or replacing electrical components to avoid injury.

When to call a professional

After checking all power sources and the dishwasher still doesn't start
If the control panel displays an error code you can't resolve
If you suspect internal wiring or electrical issues
If the water inlet valve is faulty and you're not comfortable replacing it yourself
If the door switch or control panel needs replacement but you're unsure how to proceed

FAQ

Why is my dishwasher not getting power?

Check the circuit breaker to ensure it hasn't tripped. Verify the dishwasher is properly plugged in and the outlet is working. If power seems normal but the dishwasher still doesn't start, the issue may be internal and require professional help.

How do I reset my dishwasher?

Unplug the dishwasher for one minute or turn off the circuit breaker for the same duration. Plug it back in or restore power and try starting it again. If it still doesn't work, consult the owner's manual for model-specific reset instructions.

Can a clogged filter prevent the dishwasher from starting?

A clogged filter typically affects cleaning performance, not the start function. However, in rare cases, a severely clogged filter might trigger a safety lockout. Clean the filter regularly to prevent issues.

What should I do if the door latch is broken?

If the door latch is broken or not engaging, the dishwasher won't start. Replace the door switch or latch mechanism. If you're not comfortable doing this, contact a professional technician.

Why is there no water entering the dishwasher?

Check that the water supply valve under the sink is fully open. If it is, the water inlet valve may be faulty and need replacement. A multimeter can help test the valve's functionality.