If your Bosch dishwasher isn’t filling with water, the problem is usually something simple like the water supply, inlet valve, or a clogged filter.
Table of contents
Troubleshooting steps
- Check the water supply
- Make sure the dishwasher’s water-supply valve under the sink is fully open.
- Check the supply hose for kinks or crushing.
- If other fixtures have normal water pressure, the household supply is probably fine.
- Make sure the dishwasher door is fully latching
- Bosch dishwashers generally won’t fill unless the door-latch mechanism registers the door as closed.
- Close the door firmly and listen for the latch to engage.
- Check the AquaStop/supply hose
- If your Bosch has an AquaStop safety valve, inspect the hose for obvious damage or leaks.
- Don’t disassemble the AquaStop assembly; it is a safety component.
- Clean the inlet screen
- Turn off electrical power and the water supply first.
- Where the water-supply hose connects to the dishwasher, there may be a small mesh inlet screen. Sediment can restrict water flow.
- Clean it gently rather than poking or enlarging the screen.
- Check the filters and drain area
- Remove and clean the dishwasher’s filters.
- Make sure the sump/drain area isn’t blocked by food debris or glass.
- A dishwasher that cannot drain properly may behave differently on the next cycle.
- Listen when starting a cycle
- Humming but no water: the inlet valve may be stuck/failed, or the water supply may be restricted.
- No sound at all: the issue could involve the door latch, control system, wiring, or another safety interlock.
- Briefly fills then stops: a water-level/flow-sensing issue may be involved.
- Look for an error code
- Bosch models use different displays and error codes. If you’re seeing something such as E15, E16, E17, or E18, the code can significantly narrow the diagnosis.
Important safety note
Before removing panels or accessing wiring, disconnect the dishwasher from electrical power and shut off the water supply. If water is leaking into the base of the machine, don’t keep running it.
If you give me your Bosch dishwasher model number (E-Nr.) and tell me what happens when you start a cycle—for example, whether you hear the drain pump, hear humming, get an error code, or hear nothing—I can walk you through the specific checks for that model.
