Carrier Central AC Error Codes
Complete list of Carrier central ac error codes with causes and how to fix them.
E1
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Carrier Central Air Conditioner error code E1: Indoor/outdoor unit communication …
Technician Required
E2
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Carrier Central Air Conditioner error code E2: Zero-crossing signal detection …
Technician Required
E3
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Carrier Central Air Conditioner error code E3: Fan motor stall protection.
Technician Required
E4
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Carrier Central Air Conditioner error code E4: High discharge temperature …
Technician Required
E5
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Carrier Central Air Conditioner error code E5: Over-current/over-load …
Technician Required
E6
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Carrier Central Air Conditioner error code E6: Communication error between …
Technician Required
E7
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Carrier Central Air Conditioner error code E7: Mode conflict (multiple indoor …
✓ DIY Possible
E8
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Carrier Central Air Conditioner error code E8: Indoor unit fan motor error.
✓ DIY Possible
F0
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Carrier Central Air Conditioner error code F0: IPM (Intelligent Power Module) …
Technician Required
F1
🔴
Carrier Central Air Conditioner error code F1: High pressure protection.
Technician Required
F2
🔴
Carrier Central Air Conditioner error code F2: Low pressure protection.
Technician Required
F3
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Carrier Central Air Conditioner error code F3: Compressor discharge temperature …
Technician Required
F4
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Carrier Central Air Conditioner error code F4: Outdoor ambient temperature …
✓ DIY Possible
F5
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Carrier Central Air Conditioner error code F5: Discharge temperature sensor …
✓ DIY Possible
F6
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Carrier Central Air Conditioner error code F6: Outdoor coil temperature sensor …
✓ DIY Possible
F7
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Carrier Central Air Conditioner error code F7: Indoor coil temperature sensor …
✓ DIY Possible
F8
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Carrier Central Air Conditioner error code F8: Indoor ambient temperature sensor …
✓ DIY Possible
F9
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Carrier Central Air Conditioner error code F9: Indoor humidity sensor failure.
✓ DIY Possible
H3
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Carrier Central Air Conditioner error code H3: Compressor overload.
Technician Required
H4
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Carrier Central Air Conditioner error code H4: Indoor/outdoor communication …
Technician Required
H5
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Carrier Central Air Conditioner error code H5: IPM module protection.
Technician Required
H6
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Carrier Central Air Conditioner error code H6: Indoor fan motor feedback error.
✓ DIY Possible
H7
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Carrier Central Air Conditioner error code H7: Outdoor synchronization failure.
✓ DIY Possible
P0
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Carrier Central Air Conditioner error code P0: IPM protection.
Technician Required
P1
🔴
Carrier Central Air Conditioner error code P1: High voltage protection.
Technician Required
P2
🔴
Carrier Central Air Conditioner error code P2: Low voltage protection.
Technician Required
P3
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Carrier Central Air Conditioner error code P3: Compressor phase loss protection.
Technician Required
P4
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Carrier Central Air Conditioner error code P4: Compressor overheating …
Technician Required
P5
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Carrier Central Air Conditioner error code P5: Compressor overcurrent …
Technician Required
P6
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Carrier Central Air Conditioner error code P6: Drive module overheating.
Technician Required
P7
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Carrier Central Air Conditioner error code P7: PFC protection.
Technician Required
P8
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Carrier Central Air Conditioner error code P8: Outdoor temperature too high.
✓ DIY Possible
P9
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Carrier Central Air Conditioner error code P9: Compressor overload.
Technician Required