Bosch Dishwasher Error Code E20 — Heat Pump Error
What this means
The E20 error appears on Bosch dishwasher models equipped with a heat pump drying system. It indicates the heat pump compressor or its associated sensors have detected a fault. This prevents the efficient drying feature from working properly.
Step-by-step fix
2 stepsPower cycle the dishwasher
Turn off the breaker for 10 minutes and restart. Heat pump systems can sometimes recover from temporary faults after a longer reset.
Use a longer reset period (10 minutes) for heat pump errors.
Ensure proper ventilation
Make sure the dishwasher has adequate airflow around it and the kitchen is not excessively hot, as the heat pump needs to exchange heat with the surrounding air.
Running other heat-generating appliances nearby can affect heat pump performance.
When to call a professional
Heat pump systems contain refrigerant and sealed components that require certified technician repair. Do not attempt DIY repair.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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