Bosch Dishwasher Won't Start: Troubleshooting Guide
Quick answer
Check if the dishwasher is receiving power, ensure the door is fully closed and latched, and look for error codes on the control panel. Reset the dishwasher by unplugging it for 1 minute.
Confirm the symptom
- Dishwasher does not power on at all
- No response when pressing start button
- Door is closed but dishwasher remains inactive
Tools and prep
- Screwdriver — To access internal components if needed
- Multimeter — To test electrical connections
- Flashlight — To inspect internal parts
- Socket Wrench — For removing panels
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
Prep & safety
- Ensure the dishwasher is unplugged before inspecting internal components.
- Wear rubber gloves to avoid electrical shocks.
Step-by-step troubleshooting
Check Power Supply
Do: Verify the dishwasher is plugged in and the circuit breaker hasn't tripped.
Observe: Power indicator light is on or breaker is in 'on' position.
Means: Power supply is functioning.
Next: If power is confirmed, proceed to next step.
Inspect Door Latch
Do: Check if the door is fully closed and the latch is engaged.
Observe: Door closes securely and latch clicks into place.
Means: Door mechanism is working properly.
Next: If door is properly closed, move to next step.
Look for Error Codes
Do: Check the control panel for any displayed error codes.
Observe: Error code is visible on the display.
Means: Specific issue can be identified.
Next: Refer to Bosch's error code guide for solutions.
Reset the Dishwasher
Do: Unplug the dishwasher for 1 minute, then plug it back in.
Observe: Dishwasher powers on after being reset.
Means: Temporary electrical issue was resolved.
Next: If reset works, no further action needed. If not, continue troubleshooting.
Test Control Panel
Do: Press and hold the Start button for 5 seconds.
Observe: Control panel responds or error code changes.
Means: Control panel may be faulty.
Next: If no response, consider replacing the control board.
Check Water Supply
Do: Ensure the water inlet valve is open and not clogged.
Observe: Water flows freely to the dishwasher.
Means: Water supply is adequate.
Next: If water is flowing, proceed to next step.
Common causes table
| Cause | Why | Likelihood | Difficulty | Part often needed |
|---|---|---|---|---|
| Power outage or tripped circuit breaker | Dishwasher requires electricity to operate. | High | Easy | No |
| Faulty door latch | Door must be securely closed for the dishwasher to start. | Medium | Medium | Yes |
| Control panel malfunction | The control board may not be sending signals to start the cycle. | Medium | Hard | Yes |
| Water supply issue | Dishwasher may not start if water isn't available. | Low | Easy | No |
| Blocked drain or filter | A clogged drain can prevent the dishwasher from starting. | Low | Medium | Yes |
| Faulty main board | The main board controls all dishwasher functions. | Low | Hard | Yes |
Parts matching
If you need to replace parts, match these specifications:
- Door Latch: model number and compatibility with your Bosch model
- Control Panel: exact model number from the dishwasher's label
- Water Inlet Valve: voltage and model number
- Main Board: model and serial number from the dishwasher
Always refer to your dishwasher's manual for part compatibility.
Disclosure: We may earn a commission from qualifying purchases via affiliate links. Learn more.
When to call a pro
- If the dishwasher still won't start after troubleshooting
- If you suspect a faulty main board or control panel
- If you're uncomfortable working with electrical components
- If error codes persist after resetting the appliance
FAQ
Why is my Bosch dishwasher not turning on?
Check if the power supply is working, the door is closed, and there are no tripped circuit breakers.
How do I reset my Bosch dishwasher?
Unplug the dishwasher for 1 minute, then plug it back in and try starting it again.
What does an error code on my Bosch dishwasher mean?
Refer to the Bosch error code guide to identify the specific issue and solution.
Can a clogged filter prevent the dishwasher from starting?
Yes, a blocked drain or filter can cause the dishwasher to not start. Clean the filter and drain to resolve the issue.