Check the door latch and control lock first; they cause most no-start issues.
- Reset the circuit breaker and inspect the float switch and door switch.
- Regular cleaning and proper loading prevent future problems.
- Call a pro if basic fixes fail; consider replacement if the unit is old.
Why won't my dishwasher start? Common causes
A dishwasher that won't start usually has a simple cause. The door latch is the most common culprit. If the door isn't fully closed, the control board won't receive the signal to start. A tripped circuit breaker or blown fuse also stops power. The control lock feature, if enabled, disables all buttons. A faulty door switch or float switch can also prevent startup. Less common but possible: a broken timer or control board.
How to fix a dishwasher that won't start: step-by-step
Start by checking the door latch. Close the door firmly and listen for a click. Press the Start button and hold for three seconds. If the control lock indicator is lit, press and hold the control lock button for five seconds. Next, locate your home's circuit breaker panel. Find the dishwasher breaker and reset it by flipping it off and on. If the dishwasher has a float switch, usually in the bottom of the tub, ensure it moves freely. Remove any debris that might block it. Finally, inspect the door switch for continuity using a multimeter. Replace it if it's defective.
How to prevent a dishwasher from not starting
Clean the door latch and strike plate regularly. Food debris can build up and prevent a tight seal. Avoid overloading the dishwasher, which can force the door open. Use the control lock feature only when needed, and teach family members how to disable it. Run your dishwasher monthly with a cleaning tablet to keep the float switch clear. Check the circuit breaker occasionally to ensure it's not tripping due to other appliances.
When to call a professional or replace the dishwasher
If you've checked the door, power, and switches, and it still won't start, call a technician. A faulty control board or wiring issue requires professional diagnosis. If your dishwasher is over 10 years old and repairs cost more than half the price of a new one, consider replacement. Persistent problems like frequent breakdowns or poor cleaning indicate it's time to upgrade. A new dishwasher uses less water and energy, saving you money in the long run.