Bosch Heat Pump Error Codes
Complete list of Bosch heat pump error codes with causes and how to fix them.
E1
🟢
Bosch Heat Pump error code E1: Outdoor temperature sensor failure.
✓ DIY Possible
E2
🟢
Bosch Heat Pump error code E2: Indoor ambient temperature sensor failure.
✓ DIY Possible
E3
🟢
Bosch Heat Pump error code E3: Indoor coil temperature sensor failure.
✓ DIY Possible
E4
🟢
Bosch Heat Pump error code E4: Outdoor coil temperature sensor failure.
✓ DIY Possible
E5
🟢
Bosch Heat Pump error code E5: Discharge temperature sensor failure.
✓ DIY Possible
E6
🟢
Bosch Heat Pump error code E6: Suction temperature sensor failure.
✓ DIY Possible
E7
🔴
Bosch Heat Pump error code E7: High pressure protection.
Technician Required
E8
🔴
Bosch Heat Pump error code E8: Low pressure protection.
Technician Required
E9
🟡
Bosch Heat Pump error code E9: Compressor overcurrent protection.
Technician Required
F1
🟡
Bosch Heat Pump error code F1: Communication failure (indoor to outdoor).
Technician Required
F2
🟢
Bosch Heat Pump error code F2: Fan motor fault.
✓ DIY Possible
F3
🟢
Bosch Heat Pump error code F3: Drain pump fault / float switch.
✓ DIY Possible
F4
🟡
Bosch Heat Pump error code F4: Compressor drive module fault.
Technician Required