Bosch Washing Machine Error E18: What It Means and How to Fix It
Short answer
E18 on a Bosch washing machine means: the drainage hose is blocked or kinked, so water is not pumped out (also shown as F18). First step: Switch the programme to OFF and pull the mains plug.
Drain hose blocked or kinked
How to fix it
- 1Switch the programme to OFF and pull the mains plug.
- 2Check the drain hose is installed without kinks.
- 3Loosen the hose clip at the siphon, carefully remove the hose and residual water, clean hose and siphon spigot.
- 4Clean the pump: open the service flap, drain water slowly by removing the pump cover, clean the interior/thread/housing; the impeller must turn; refit and screw the cover on firmly.
- 5Pour ~1 l of water into the detergent dispenser and check for leaks, then start the DRAIN programme.
- 6If the code persists, contact Bosch customer service.
Safety
- Leaking water may be very hot: scalding risk. Switch off and unplug first.
- Close the water tap before starting.
When to call a professional: If the pump or hose cleaning does not help (a defective pump needs a repair).
Applies to: Bosch washing machines
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Source
Based on Bosch's official error code information: Bosch US – Washer Error Codes. Last checked 2026-10-28. Codes and their meaning can differ by model and region; check your appliance's manual.
Frequently asked questions
What does Bosch washing machine error code E18 mean?
The drainage hose is blocked or kinked, so water is not pumped out (also shown as F18).
How do I fix E18 on a Bosch washing machine?
Switch the programme to OFF and pull the mains plug. Check the drain hose is installed without kinks. Loosen the hose clip at the siphon, carefully remove the hose and residual water, clean hose and siphon spigot. Clean the pump: open the service flap, drain water slowly by removing the pump cover, clean the interior/thread/housing; the impeller must turn; refit and screw the cover on firmly. Pour ~1 l of water into the detergent dispenser and check for leaks, then start the DRAIN programme. If the code persists, contact Bosch customer service.
When should I call a technician for E18?
If the pump or hose cleaning does not help (a defective pump needs a repair).