Bosch Washer Error Code E18: How to Fix It

Medium 30-60 minutes High Severity Verified June 2026
Error Code
E18
Brand
Bosch
Product Type
washer
Severity
High
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Bosch washer error code E18 (also shown as F18) indicates a drain pump error where water isn't draining within the expected time limit. This is typically caused by clogs in the drain system, a faulty drain pump, or blocked filters that prevent proper water evacuation.
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Tools You'll Need

How to Fix Error Code E18

  1. Safety First - Unplug the Washer

    Always disconnect power before performing any maintenance to prevent electrical shock.
  2. Check and Clean the Drain Filter

    Water will spill out when removing the filter - have towels and a pan ready to catch it.
  3. Inspect the Drain Hose

  4. Test the Drain Pump

  5. Run a Test Cycle

  6. Check Household Drain System

Parts You May Need

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When to Call a Professional

Call a professional appliance technician if the drain pump is faulty and needs replacement, if electrical connections appear damaged, or if the error persists after cleaning all accessible components. Also contact a plumber if your household drain system is backing up.

Frequently Asked Questions

What does Bosch washer error code E18 mean?
Error code E18 (or F18) means the washer's drain pump isn't removing water within the expected time limit. This usually indicates a clogged drain filter, blocked hose, or faulty drain pump.
Can I still use my Bosch washer with E18 error?
No, you should not use the washer when error E18 appears. The error indicates water isn't draining properly, which can damage the washer and flood your laundry area if you continue using it.
How often should I clean my Bosch washer drain filter?
Clean the drain filter every 1-3 months, depending on usage and water hardness. Regular cleaning prevents lint and debris buildup that can cause E18 errors.
Is Bosch washer error E18 the same as F18?
Yes, E18 and F18 refer to the same drain pump error on Bosch washers. Different models may display the code with either an 'E' or 'F' prefix, but both indicate the same drainage problem.
How much does it cost to fix a Bosch washer E18 error?
If it's just a clogged filter or hose, the fix costs nothing but your time. If the drain pump needs replacement, expect to pay $150-300 for parts and labor from a professional technician.