Bosch Dishwasher Error Code E18: Meaning and Fix
Reading the dishwasher display
A dishwasher reports its fault in the display window, or by blinking a cycle light a set number of times with a pause between groups. Count the blinks and pauses before opening the door. Bosch shows the code with a leading E and a number on both dishwashers and washers.
Bosch (part of BSH Home Appliances) uses E-numbered codes on dishwashers and washers. Its dishwashers share control platforms with Thermador and Gaggenau, so the same fault can appear on those brands. The codes apply to model numbers such as SHPM65Z55N, SHE53T55UC and WAT28400UC; check the label on your unit to confirm yours.
What causes E18
- Low household water pressure or a half-closed shutoff valve
- Closed or partly closed shut-off valve under the sink
- A clogged mesh screen on the inlet valve or a kinked fill hose
- A failing inlet valve solenoid that opens slowly, sticks open or does not open at all
How to fix it
- Cancel the cycle and make sure the hot and cold supply valves behind the machine are fully open.
- Turn off the water, disconnect the fill hose and rinse the small filter screen at the valve inlet to clear sediment.
- Open the shut-off valve fully and run the tap to purge air.
- Inspect the hose for kinks and test another faucet in the home to confirm pressure is normal.
- Reconnect, restore power and start a short cycle while listening for the valve clicking and water running in.
- If water still fails to arrive (or never stops), measure the valve coil with a multimeter and replace the inlet valve if it is out of range.
Parts you may need
| Part | Part no. | Buy |
|---|---|---|
| Dishwasher Water Inlet Valve | 10023852 | Find part |
Part numbers are OEM references; confirm fit by your model number before ordering. Some links are affiliate links; we may earn a commission at no extra cost to you.
Questions
What does error E18 mean on a Bosch dishwasher?
The dishwasher did not take in any water within the fill window. Exact behavior can vary by model and software version; confirm against your own manual.
Can I keep using my dishwasher while E18 is showing?
Only briefly. A machine that cannot fill correctly will wash poorly and, if the valve sticks open, can overflow, so shut the water off at the wall when it is idle.
How do I clear E18, and can I fix it myself?
Cancel the program, switch the appliance off and leave it unplugged (or the breaker off) for about five minutes, then restart. The code only stays cleared if the underlying problem is fixed, so work through the steps above. This one is usually a do-it-yourself job with basic tools.
Other Bosch dishwasher codes
Sources
Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.
Applies to models including SHPM65Z55N, SHE53T55UC, SHX53TL5UC, SHEM63W55N.