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Carrier A/C Error Codes

Carrier Error Code What this means
Solid on, one flash, and two flashes Normal operation
Error Code 16 System communication failure
Error Codes 31 and 84 High-pressure problem
Error Codes 32 and 83 Low-pressure problem
Error Code 45 Fault with the control board
Error Codes 46, 47, 73, 74, 75, 76, 77, 78, 85, and 87 Voltage problems
Error Code 53 Fault with the outdoor temperature sensor
Error Code 55 Problem with the coil
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