Error code
Bosch Dishwasher Error Code E18
Bosch Dishwasher E18 usually means the dishwasher is not getting enough water. Check the water supply and inlet hose safely, then stop if the code returns.
Quick answer
E18: what does it mean and how to fix
What does it mean?
the dishwasher is not getting enough water.
How to fix first
Switch off and unplug the dishwasher before moving or checking accessible hoses.
Why is this happening?
Water supply tap closed or partly closed
When should I call an engineer?
Call a dishwasher engineer if E18 returns after checking the tap, hose, and inlet filter, if the appliance is integrated and cannot be accessed safely, or if filling would require internal diagnosis.
What does this error code mean?
Bosch dishwasher error code E18 usually means the water supply has been cut off or is too low for the dishwasher to fill correctly. It can point to a closed tap, low water pressure, a kinked inlet hose, or a blocked inlet filter.
Keep checks to the accessible supply tap, hose, and filter. If E18 returns after these checks, arrange diagnosis rather than opening the appliance.
E18 is a fill-water warning involving the supply tap, inlet hose, inlet filter, water pressure, and fill components.
Symptoms users may notice
- The dishwasher may start and then stop before the wash properly begins.
- The tub may look dry or only partly filled.
- You may hear little or no water entering the appliance.
Why is this happening?
- Water supply tap closed or partly closed
- Low incoming water pressure
- Kinked or trapped inlet hose
- Blocked inlet hose filter
What this usually points to
E18 is a fill-water warning involving the supply tap, inlet hose, inlet filter, water pressure, and fill components.
How to fix this safely
- Switch off and unplug the dishwasher before moving or checking accessible hoses.
- Check the water supply tap is open and the inlet hose is not kinked or trapped.
- If your manual allows it, turn off the water supply and rinse the detachable inlet filter under the tap.
- Refit everything securely before trying one short programme.
Can I fix this myself?
YesYou can check the water tap, visible hose route, and user-accessible inlet filter. Stop if the code returns or access would require removing panels.
Safety boundary: Disconnect power before accessible checks. Do not remove panels, work on wiring, or run the dishwasher if water may be reaching electrical parts.
What not to do
- Do not keep restarting the dishwasher if it still will not fill.
- Do not disconnect hoses without turning off the water supply.
- Do not remove panels or inspect inlet valves yourself.
Reset steps
- Restore power only after the hose and water supply checks are complete.
- Run one short programme if there is no leak and the appliance fills normally.
- Stop and arrange repair if E18 returns or the dishwasher does not fill.
Intermittent vs persistent faults
A one-off E18 may clear after correcting a water-supply issue, but repeated E18 needs diagnosis.
When to call an engineer
Call a dishwasher engineer if E18 returns after checking the tap, hose, and inlet filter, if the appliance is integrated and cannot be accessed safely, or if filling would require internal diagnosis.
Safety warning
Disconnect the dishwasher from power before checking accessible hoses or filters, and turn off the water supply before disconnecting any inlet hose.
Useful hub links
Related fill water fault codes
Relevant guide
Frequently asked questions
What does Bosch dishwasher E18 mean?+
Bosch Dishwasher Error Code E18 usually means the dishwasher is not getting enough water or the water supply is restricted.
Can a kinked hose cause Bosch E18?+
Yes. A kinked, trapped, or blocked inlet hose can reduce water flow enough for E18 to appear.
Can I still use a Bosch dishwasher with E18?+
Do not keep using it while E18 is active. Try one safe test only after checking the water supply and stopping any leaks.
Model variation note
Bosch dishwasher code wording can vary by model. Use the exact model manual where available, and keep checks to safe user-accessible areas.