Bosch Washer - F27 Error Code
The pressure sensor is reporting invalid water level readings.
Meaning
The pressure sensor is reporting invalid water level readings.
The Bosch F27 error code indicates a fault in the pressure sensor system, which monitors water level inside the drum. If the sensor detects impossible values—such as overfilling, underfilling, or rapid fluctuations—the washer triggers F27 to prevent flooding or mechanical damage. This can be caused by a blocked pressure hose, faulty sensor, or wiring issues.
Symptoms
Causes
Step-by-Step Fixes
- Inspect the pressure hose for blockages or kinks.
- Check the pressure sensor wiring harness.
- Test the pressure sensor for proper voltage and resistance.
- Reset the washer and retry the cycle.
Safety Notes
- Do not operate the washer if overfilling is suspected.
Applicable Models
Show Models
- WAT28400UC
- WGB86200UC
Related Pages
Other Bosch Washer Error Codes
Show All Error Codes
- Bosch Washer CL Indicator
- Bosch Washer Drain Icon Indicator
- Bosch Washer Drum Clean Indicator
- Bosch Washer E00 / -18 Error Code
- Bosch Washer E00 / -23 Error Code
- Bosch Washer E10 / -00 / -10 / -20 Error Code
- Bosch Washer E16 / F16 / E34 / F34 Error Code
- Bosch Washer E17 / F17 / F29 Error Code
- Bosch Washer E18 / F18 Error Code
- Bosch Washer E19 / F19 Error Code
- Bosch Washer E20 / F20 Error Code
- Bosch Washer E23 / F23 Error Code
- Bosch Washer E25 / F25 Error Code
- Bosch Washer E26 / F26 Error Code
- Bosch Washer E28 / F28 Error Code
- Bosch Washer Er:01 Error Code
- Bosch Washer Er:02 Error Code
- Bosch Washer Er:03 Error Code
- Bosch Washer Er:04 Error Code
- Bosch Washer Er:05 Error Code
- Bosch Washer Er:06 Error Code
- Bosch Washer Er:07 Error Code
- Bosch Washer Er:09 Error Code
- Bosch Washer Er:10 Error Code
- Bosch Washer Er:11 Error Code
- Bosch Washer Er:12 Error Code
- Bosch Washer Er:13 Error Code
- Bosch Washer Er:14 Error Code
- Bosch Washer Er:15 Error Code
- Bosch Washer Er:16 Error Code
- Bosch Washer Er:17 Error Code
- Bosch Washer Er:18 Error Code
- Bosch Washer Er:19 Error Code
- Bosch Washer Er:20 Error Code
- Bosch Washer Er:21 Error Code
- Bosch Washer Er:22 Error Code
- Bosch Washer Er:23 Error Code
- Bosch Washer Key Icon Indicator
- Bosch Washer Pause/Play Flashing Indicator
- Bosch Washer Suds / Foam Indicator
- Bosch Washer Tap Icon Indicator
Model-Specific Notes
On Bosch 800 Series models, F27 may appear after extended drain retries if the pressure hose is partially blocked.
Disclaimer
The information provided on this page is for educational and informational purposes only. Repairs involve electrical, mechanical, and water-related risks. Always follow manufacturer instructions and consider contacting a qualified technician for diagnosis or repair.