Bosch washing machines are renowned for their reliability and advanced technology, but like all appliances, they occasionally encounter issues. When problems arise, your machine displays error codes to help identify what’s going wrong. Understanding these codes can save you time and money by helping you determine whether you can fix the issue yourself or need professional assistance.
Common Bosch Error Codes
| Error Code | Meaning | Common Cause |
|---|---|---|
| E01 | Door lock malfunction | Door not properly closed or lock mechanism faulty |
| E02 | Water filling problem | Water supply issue or inlet valve failure |
| E03 | Drainage issue | Blocked pump, filter, or drain hose |
| E04 | Water overflow detected | Too much detergent or faulty pressure switch |
| E13 | Water leak detected | Leak in drum, hoses, or door seal |
| E17 | Water intake problem | Low water pressure or kinked inlet hose |
| E18 | Drainage timeout | Pump blockage or drain hose obstruction |
| E23 | Drain pump issue | Pump blocked or defective |
| E27 | Door lock error | Electronic door lock fault |
| E67 | PCB programming error | Control module needs reprogramming |
| F21 | Motor drive problem | Motor or control board failure |
| F43 | Drum not rotating | Motor blocked or drum obstruction |
Understanding Your Bosch Error Codes
When your Bosch washing machine displays an error code, it’s communicating specific information about what’s preventing it from operating correctly. These codes are designed to be diagnostic tools that point technicians and homeowners toward the source of the problem.
Door and Lock Errors (E01, E27): These are among the most common issues. The E01 code typically appears when the door hasn’t closed properly or the locking mechanism is faulty. Before calling for service, ensure nothing is caught in the door seal and that the door clicks firmly shut. The E27 error indicates a more serious electronic fault with the door lock mechanism that usually requires professional repair.
Water Supply Issues (E02, E17): These codes relate to problems getting water into the machine. Check that your water supply taps are fully open and that the inlet hose isn’t kinked or blocked. Low water pressure in your home can also trigger these errors. The inlet filter, located where the hose connects to the machine, may be clogged with sediment and should be cleaned periodically.
Drainage Problems (E03, E18, E23): Drainage errors are frequently caused by blockages in the drain system. Start by checking the drain filter, usually located behind a small panel at the bottom front of the machine. Remove any debris, coins, or lint that may have accumulated. Also inspect the drain hose for kinks or blockages. If the pump itself is faulty, you’ll hear unusual noises or no sound at all when the machine attempts to drain.
Water Level and Overflow (E04, E13): The E04 error often results from using too much detergent, which creates excessive suds that confuse the pressure sensor. Modern high-efficiency Bosch machines require only small amounts of HE (high-efficiency) detergent. The E13 code indicates the machine has detected water where it shouldn’t be, suggesting a leak in the drum, hoses, or door seal that needs immediate attention.
Motor and Drum Issues (F21, F43): These errors indicate problems with the motor or drum movement. The F43 code may appear if something is jamming the drum, preventing it from rotating freely. Check that the drum can be turned by hand when the machine is off. Motor failures typically require professional repair and may involve replacing the motor or control board.
Troubleshooting Steps
When you encounter an error code, follow these general steps. First, note the exact code displayed and consult your manual or the table above. Second, turn off the machine and unplug it for a few minutes to reset the electronics. Third, check for obvious issues like closed water taps, kinked hoses, or items blocking the door. Fourth, clean the drain filter and inspect accessible components. Finally, if the error persists after these basic checks, contact Bosch customer service or a qualified technician.
Prevention and Maintenance
Many error codes can be prevented through regular maintenance. Clean your drain filter monthly, use the correct type and amount of detergent, avoid overloading the drum, and periodically run a hot maintenance wash with machine cleaner. These simple practices keep your Bosch washing machine running smoothly and reduce the likelihood of error codes appearing.
Understanding error codes empowers you to maintain your appliance effectively and know when professional help is truly needed.