Error code
Bosch Washing Machine Error Code E18
Quick answer
E18
The machine is not draining water correctly
First safe action
Switch the appliance off and unplug it from the mains.
Meaning
Bosch washing machine error code E18 usually means wastewater is not leaving the appliance properly. A blocked filter, a restricted drain hose, or a pump issue are common causes.
Likely causes
- Blocked drain filter
- Kinked or obstructed drain hose
- Drain pump blockage or pump fault
Safe first checks
- Switch the appliance off and unplug it from the mains.
- Check the accessible drain filter for coins, lint, or other debris.
- Inspect the drain hose for kinks before trying a drain or rinse cycle.
How to reset
- Reconnect power after the drainage path has been checked.
- Run a drain or rinse programme to test whether the fault has cleared.
When to call an engineer
If the code returns after basic drainage checks, the pump or internal drainage path may need an engineer visit.
Safety warning
Always disconnect the appliance from the mains before opening any accessible filter or checking hose connections.
Useful hub links
Related fault codes
E17 for Bosch Washing Machine
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Relevant guides
Frequently asked questions
Can I keep using a Bosch washing machine with E18 showing?+
It is usually better to pause use until you have completed the safe first checks for E18, then test the machine with a short programme.
Will resetting clear E18 for good?+
A reset may clear a temporary interruption, but if E18 comes back after the first safe checks, the underlying fault still needs attention.