What to check, in order
- Open the supply tap fully
Usually under the sink.
- Check the inlet hose
It shouldn't be kinked behind the machine.
- Check the inlet valve filter
Turn the water off and look for debris in the small filter where the hose connects. A clogged filter can often be cleaned.
When to call an engineer
If the valve has failed electrically, it needs replacing.
Parts people end up buying
Only if the checks above point to a part. Match it to your model number first: it's on a label on the edge of the door or the side of the tub.
- Water inlet valveSearch on Amazon
- Inlet hoseSearch on Amazon
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Quick answers
What does the E1 error code mean on a dishwasher?
The dishwasher isn't filling properly, usually because the water inlet valve is blocked or has failed.
Can I fix E1 on a dishwasher myself?
Easy (about 20 minutes). Start with: open the supply tap fully; check the inlet hose; check the inlet valve filter. If the valve has failed electrically, it needs replacing.
Is E1 on a dishwasher worth repairing?
Worth fixing. The inlet valve is one of the cheapest parts on the machine.
About this code
Unbranded and less common appliances don't publish one shared code list, so this page gives the most common meaning across makers. Your manual is the final word, and the model number that finds it is on a label on the edge of the door or the side of the tub.
Last reviewed October 2026.