e20
Moderate
Bosch · Washing Machines
Unexpected water heating
Quick Answer
Error code E20 on your Bosch Washing Machines means: Unexpected water heating. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Power off the washer immediately as unexpected heating can be a safety issue.
2
Test and replace the temperature sensor (NTC) and its relay.
3
Inspect the control board for damage or faulty relay components.
4
Replace the control board if the sensor and relay test normal.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
NTC temperature sensor
Heater relay
Control board
Related Error Codes