Bosch · Washing Machine

E18

Drain Fault — Water Not Pumping Out

Severity

High

The error code E18 on your Bosch Washing Machine indicates a specific system failure categorized as "Drain Fault — Water Not Pumping Out". This guide walks you through the most likely causes and the correct repair sequence.

Owner's Summary

Bosch's E18 means the drain pump ran but couldn't empty the drum in time. The lint filter located behind a small door at the bottom of the machine is the most common cause. Cleaning it takes 10 minutes and requires only a towel and a flathead screwdriver.

Symptoms

Bosch washer not draining, door locked at end of cycle, E18 displayed

Common Causes

Clogged pump filter with coins, hairpins, lint
Blocked drain hose
Failed drain pump motor
Siphon effect from improper drain hose installation

How to Fix

1 Open the filter access cover at bottom front and clean the pump filter
2 Remove kinks and check drain hose for blockages
3 Ensure drain hose is at correct height — 24 to 47 inches from floor
4 Replace drain pump if filter is clean and hose is clear

Tools You'll Need

Screwdriver Set Pliers Soft Brush Towels / Bucket

Most of these fixes need only basic hand tools. If your repair requires opening electrical housings or testing live components, a multimeter and basic electrical safety knowledge are essential — when in doubt, call a technician.

Technical Explanation

The Bosch control board monitors drain pump operation through motor current sensing. If the pressure sensor does not confirm an empty drum within the maximum pump runtime of 3 to 4 minutes, the board posts E18 and ends the cycle with door locked for safety.

Is It Safe to Keep Using?

Fix the same day. Wet laundry sitting in the drum develops mildew within hours in warm weather.

Technician's Pro Tip

A small emergency drain hose is bundled next to the filter cap on most Bosch models. Use it to drain the drum before opening the filter — this avoids spilling several liters of water on your floor.

Related Codes

E2 — Samsung Washing Machine

Water Supply Error

High

4E — Samsung Washing Machine

No Water Supply Detected

High

5E — Samsung Washing Machine

Drain Error — Water Not Draining

High

Frequently Asked Questions

What does error code E18 mean on a Bosch Washing Machine?

Code E18 on a Bosch Washing Machine indicates "Drain Fault — Water Not Pumping Out." In practice, the most common trigger is clogged pump filter with coins, hairpins, lint. Severity is rated high, and typical repair costs range from $0 to $200.

Can I fix E18 myself, or do I need a technician?

Many cases of E18 can be resolved without a technician. The first step to try: open the filter access cover at bottom front and clean the pump filter. If that doesn't clear the code, work through the remaining steps in the "How to Fix" section above before assuming a part needs replacing.

Is it safe to keep using my washing machine with code E18 showing?

Fix the same day. Wet laundry sitting in the drum develops mildew within hours in warm weather.

How much does it cost to repair E18 on a Bosch Washing Machine?

Repair costs for code E18 typically range from $0 to $200. Filter cleaning: $0 DIY; Drain pump: $60–$200 + labor. Costs on the low end usually reflect a DIY fix with no parts required, while the high end reflects a part replacement plus professional labor.

Estimated Repair Cost USD

$0 – $200

Filter cleaning: $0 DIY; Drain pump: $60–$200 + labor