Goodman Air Conditioner Error Codes  Goodman Air Conditioner Error Codes Goodman Air Conditioner Error Codes Error code problem A2 shorted sensor. / Open sensor. / Sensor disconnected. Sensor out of range. A3 short sensor. / Open sensor. / Sensor disconnected. Sensor out of range. E5 low voltage wiring. EE compressor relay contact welded. b0 Indoor blower motor problem. b9 indoor blower