Bosch Washing Machine Error F18

⚡ Quick Answer: The Bosch washing machine F18 error indicates a drainage issue, often caused by a clogged drain filter or hose, or a faulty drain pump. When this erro... ✅ DIY Fixable

What Does Error F18 Mean?

The Bosch washing machine F18 error indicates a drainage issue, often caused by a clogged drain filter or hose, or a faulty drain pump. When this error occurs, the machine struggles to drain water, leading to incomplete wash cycles and wet laundry. Resolving the F18 error typically involves checking and cleaning the drain filter and inspecting the drain hose for blockages or improper installation.

Common Symptoms:

  • Washing machine fails to drain water or drains slowly (wet laundry remains)
  • Wash cycle stalls or stops before completion
  • Error F18 displayed sometimes alongside blinking indicators for spin speeds

Possible Causes

  • Clogged drain filter or drain hose (high)
  • Faulty or jammed drain pump (high)
  • Incorrect drain hose installation (kinks, improper height) (medium)

How to Fix Error F18

DIY Fix Check and clean the drain filter

  1. Turn off and unplug the washing machine.
  2. Open the service access panel at the bottom front.
  3. Place a tray/towel to catch water and slowly remove the drain filter.
  4. Clean out lint, debris, coins, etc., then reinsert the filter securely.

DIY Fix Inspect drain hose for blockages or kinks

  1. Ensure the drain hose is free of bends or kinks.
  2. Remove and rinse the hose under water to clear any obstructions.
  3. Reinstall ensuring it is at the proper height and not overly inserted into the standpipe.

Technician Only Test and replace the drain pump if necessary

  1. Disconnect machine from mains and water.
  2. Access the drain pump (typically via bottom/front panel).
  3. Test pump impeller for free rotation and electrical continuity.
  4. Replace pump assembly if it is faulty or jammed beyond cleaning.

Parts needed: drain pump assembly

🛑 When to Call a Pro:
  • If the pump impeller is inaccessible or you are unsure how to safely disassemble components.
  • If error persists after cleaning filters and hoses.
  • If unusual noises or electrical faults are detected during operation.

Technical Specifications

wattage 50W
component Drain Pump
resistance 10-30 ohms
part_number 00619958
voltage_rating 120V AC

Common Questions

What does F18 error mean on Bosch washing machine?

F18 error indicates a drainage issue, preventing the machine from completing its wash cycle.

Can I fix Bosch washing machine F18 error myself?

Yes, you can check and clean the drain filter and inspect the drain hose for kinks or blockages.

How much does it cost to fix F18 error?

Repair costs for the F18 error range from ¥8,000 to ¥25,000, depending on parts and labor.

When should I call a technician for F18?

Call a technician if the error persists after cleaning, or if you're unsure about disassembling the components.

Sources & References

Data last verified: 2026-01-16

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