Bosch Washer - E20 Error Code
The washer detected abnormal temperature readings.
Meaning
The washer detected abnormal temperature readings.
The Bosch E20 and F20 error codes indicate a temperature regulation fault. The control module is constantly monitoring water temperature via an NTC (temperature) sensor and the heating circuit. If the reported temperature is outside the expected range, changes too quickly, or does not change at all when heating is active, the washer triggers E20 to prevent overheating, fabric damage, or incomplete washing. This fault can be caused by a defective NTC sensor, wiring issues, or a heating element that is not responding correctly to control signals.
Symptoms
Causes
Step-by-Step Fixes
- Unplug the washer and allow it to cool if overheating is suspected.
- Inspect the NTC sensor and wiring harness for damage or loose connections.
- Test the heating element for proper resistance and insulation.
- Reset the washer and run a short, low-temperature cycle to see if E20 reappears.
Safety Notes
- Do not continue using the washer if you smell burning or suspect overheating.
- Always disconnect power before testing electrical components.
Applicable Models
Show Models
- WAT28400UC
- WAT28401UC
- 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 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 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 Bosch 800 Series models, the control module may extend the heating phase and perform additional temperature checks before finally displaying E20, which can make affected cycles significantly longer than normal.
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.