Goodman Air Conditioner Error Codes Error Codes Problem A2 Shorted sensor./Open sensor./Sensor disconnected./Sensor out of range. A3 Shorted sensor./Open sensor./Sensor disconnected./Sensor out of range. E5 Short in low voltage wiring. EE Compressor relay contacts welded. b0 Indoor blower motor problem./Communications errorbetween indoor and outdoor unit. b9 Indoor blower motor problem./Blocked filters./Restrictive/ undersized ductwork./Indoor-outdoor unit miss match. d0 Air conditioner/heat pump is wired as part of a communicating system and integrated control module does not contain any shared data. d1 Air conditioner/heat pump is wired as part of a communicating system and integrated control module contains invalid shared data or network data is invalid for the integrated control module. d2 Air conditioner/heat pump is wired as part of a communicating system and outdoor unit requires airflow greater than indoor unit’s airflow capability./ Shared data is incompatible with the s...