E20Bosch Dishwasher — Bosch Dishwasher E20 Error Code
Heating system fault
Severity
Critical
Difficulty
Advanced
Est. Cost
What's Happening
The dishwasher's heating element or its control circuit isn't working. Water doesn't reach the correct temperature for effective cleaning and sanitization. This may be the heater itself or the relay that controls it on the control board.
How to Fix It
Reset power for 30 seconds. If E20 persists, the heating element or its control relay needs professional diagnosis. On many Bosch models the heater is integrated into the sump assembly, making this a significant repair.
Frequently Asked Questions
What does E20 mean on a Bosch dishwasher?
E20 indicates a heating system fault. The dishwasher can't heat water to the proper temperature for cleaning.
What's the difference between E09 and E20 on a Bosch dishwasher?
Both relate to heating issues. E09 is specifically the heating element failure. E20 can be the element or the control circuit/relay that powers it.
Can I still run my Bosch dishwasher with E20?
The dishwasher may run but won't heat water, resulting in poor cleaning and no sanitization. Not recommended for regular use until fixed.