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
- Turn off and unplug the washing machine.
- Open the service access panel at the bottom front.
- Place a tray/towel to catch water and slowly remove the drain filter.
- Clean out lint, debris, coins, etc., then reinsert the filter securely.
DIY Fix Inspect drain hose for blockages or kinks
- Ensure the drain hose is free of bends or kinks.
- Remove and rinse the hose under water to clear any obstructions.
- 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
- Disconnect machine from mains and water.
- Access the drain pump (typically via bottom/front panel).
- Test pump impeller for free rotation and electrical continuity.
- Replace pump assembly if it is faulty or jammed beyond cleaning.
Parts needed: drain pump assembly
- 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.
Next step
Choose the next step for F18
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Drain Pump
Pumps waste water out of the appliance during the drain cycle.
- Typical part-only price
- $35 - $80
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Model-compatible Washing Machine parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Washing Machine Cleaner Tablets
Routine tub-cleaning supplies for residue and odor control. They do not repair a mechanical, drainage, or electronic fault.
Braided Washer Inlet Hoses
A maintenance replacement option for visibly worn external fill hoses. Verify thread size, length, and hot/cold connection requirements.
Washer Drain Hose Holder
Helps secure an external drain hose at the standpipe. It does not correct an internal pump or control fault.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
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: 2026-07-25
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