Rheem / Ruud Heat Pump Error Codes
Complete list of Rheem / Ruud heat pump error codes with causes and how to fix them.
1_FLASH
🔴
Rheem / Ruud Heat Pump error code 1_flash: System lockout (ignition failure).
Technician Required
10_FLASH
🔴
Rheem / Ruud Heat Pump error code 10_flash: Ignition lockout after 3 attempts.
Technician Required
2_FLASH
🟢
Rheem / Ruud Heat Pump error code 2_flash: Pressure switch stuck closed.
✓ DIY Possible
3_FLASH
🟢
Rheem / Ruud Heat Pump error code 3_flash: Pressure switch stuck open.
✓ DIY Possible
4_FLASH
🟢
Rheem / Ruud Heat Pump error code 4_flash: Open high limit device.
✓ DIY Possible
5_FLASH
🔴
Rheem / Ruud Heat Pump error code 5_flash: Flame sensed without call for heat.
Technician Required
6_FLASH
🟢
Rheem / Ruud Heat Pump error code 6_flash: 115V power reversed / polarity.
✓ DIY Possible
7_FLASH
🔴
Rheem / Ruud Heat Pump error code 7_flash: Low flame sense current.
Technician Required
8_FLASH
🟢
Rheem / Ruud Heat Pump error code 8_flash: Low inducer speed.
✓ DIY Possible
9_FLASH
🔴
Rheem / Ruud Heat Pump error code 9_flash: Rollout switch open.
Technician Required
E1
🟡
Rheem / Ruud Heat Pump error code E1: Communication failure.
Technician Required
E2
🔴
Rheem / Ruud Heat Pump error code E2: High pressure fault.
Technician Required
E3
🔴
Rheem / Ruud Heat Pump error code E3: Low pressure fault.
Technician Required
E4
🟢
Rheem / Ruud Heat Pump error code E4: Discharge temperature protection.
✓ DIY Possible
E5
🟢
Rheem / Ruud Heat Pump error code E5: Ambient temperature sensor failure.
✓ DIY Possible
E6
🟢
Rheem / Ruud Heat Pump error code E6: Discharge pipe sensor failure.
✓ DIY Possible
E7
🟢
Rheem / Ruud Heat Pump error code E7: Defrost sensor failure.
✓ DIY Possible