ERROR CODE EXPLAINED
Bosch Washer
Bosch Washer F18 Error Code
What it means
The washer detected a drainage problem involving the drain hose or pump.
Try this first
- Turn the washer off and disconnect power.
- Check the drain hose for kinks or blockage.
- Check the drain connection.
- Clean the drain pump if safely accessible according to the owner manual.
- Restart the washer after correcting the drainage problem.
Can I keep using it?⚠ Troubleshoot drainage before continuing
Repair usually required?⚠ Usually not if caused by blockage
If the error keeps returning
If F18 remains after the drain system is checked, further diagnosis may be required.
Official source
Troubleshooting information verified against manufacturer support documentation.
View manufacturer support page →Safety note:ApplianceSignal provides general troubleshooting information. Always follow the appliance manufacturer's safety instructions and disconnect power when required.