Bosch · Dishwasher · Source basis
Bosch dishwasher E21
heat pump blocked
DISPLAYE21
The heat pump is blocked or cannot operate normally.
Bosch assigns E21 to the heat pump. Internal disassembly is not a safe user step.
Switch the appliance off in a controlled way, safely disconnect power, wait at least 30 seconds and restart once. Contact manufacturer service if the code remains.
Error codes can differ by model and series. Also check the exact model number and the matching Bosch manual.
SOURCE CHECK
Meaning and actions are based on manufacturer guidance.
- Bosch HomeChecked 30.07.2026Open original