Symptoms
- Beeping continues after the cycle should have ended
- A light or code flashes on the display
- Cycle stops partway through with an alert
- Beeping happens right when you try to start
Likely causes
- CommonDoor not fully latchedMany models beep and refuse to run, or interrupt a cycle, if the door sensor isn't fully engaged.
- CommonWater supply not turned on or low water pressureDishwashers often flag a fill error and beep if they don't detect enough incoming water.
- PossibleDrain or flow-related faultSome codes indicate the unit senses it isn't draining or filling correctly.
- PossibleFloat switch stuck or triggeredA small float in the tub that rises with water level can stick and trigger an overfill alert.
- Less commonGenuine control board or sensor faultAfter ruling out simple causes, an internal sensor or board fault may be the source.
What to do
- Check that the door is closed and fully latched, then clear any error by pressing the assigned cancel/reset button.
- Confirm the water supply valve under the sink (usually behind the dishwasher or under the sink) is fully open.
- Look up the exact beep pattern or flashing code for your model online or in the owner's manual, since codes vary by brand.
- Check the float switch in the bottom of the tub for anything blocking it and make sure it moves freely up and down.
- Power-cycle the dishwasher by turning off its breaker for one minute, then restarting the cycle.
- If the same code returns after a reset and the door, water, and float check out fine, note the code and call a technician.
Tools and parts
- None
When to call a pro
If an error code repeats after a power reset and the basics check out, an appliance technician can read the specific fault and test the related sensor or board.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.