Bosch Washer - Er:20 Error Code
The pressure switch is not responding correctly.
Meaning
The pressure switch is not responding correctly.
The Bosch Er:20 error code indicates that the washer’s pressure switch is not providing valid water level signals to the control module. The pressure switch determines when the washer has filled to the correct level. If the switch sticks, fails to toggle, or sends readings outside the expected range, the washer triggers Er:20 to prevent overfilling, underfilling, or heating without water. This error is common on older Bosch washers where detergent residue or lint can clog the pressure hose.
Symptoms
Causes
Step-by-Step Fixes
- Inspect the pressure hose for blockages or kinks.
- Remove the hose and blow through it to confirm it is clear.
- Check wiring to the pressure switch for corrosion or looseness.
- Replace the pressure switch if it fails continuity or switching tests.
Safety Notes
- Disconnect power before servicing internal components.
Applicable Models
Show Models
- WFL2060
- WFR2460
- WFMC2100
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:21 Error Code
- Bosch Washer Er:22 Error Code
- Bosch Washer Er:23 Error Code
- Bosch Washer F27 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 WFL-series washers, Er:20 frequently occurs when the pressure hose becomes partially blocked by detergent residue.
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.