Goodman Air Conditioner Error Codes

AC BrandsGoodman
Error CodeProblem
A2Shorted sensor./Open sensor./Sensor disconnected./Sensor out of range.
A3Shorted sensor./Open sensor./Sensor disconnected./Sensor out of range.
E5Short in low voltage wiring.
EECompressor relay contacts welded.
b0Indoor blower motor problem./Communications errorbetween indoor and outdoor unit.
b9Indoor blower motor problem./Blocked filters./Restrictive/ undersized ductwork./Indoor-outdoor unit miss match.
d0Air conditioner/heat pump is wired as part of a communicating system and integrated control module does not contain any shared data.
d1Air 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.
d2Air 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 system or missing parameters.
d3Shared data sent to integrated control module does not match hardware configuration.
d4Shared data on memory card has been rejected.
1Low refrigerant charge./Restriction in liquid line./Indoor blower motor failure.Indoor thermostat set extremely low.
2Blocked condenser coil./Outdoor fan not running.
3Intermittent thermostat demand./Faulty compressor relay.
4Compressor bearings are seized./Failed compressor run capacitor./Faulty run capacitor wiring./Faulty compressor wiring./Low line voltage.
5Power is disconnected./Failed compressor protector./Compressor not properly wired to control.
6Compressor start winding is open./Failed compressor run capacitor./Faulty run capacitor wiring./Compressor not properly wired to control./Faulty compressor wiring.
7Compressor run winding is open./Compressor no properly wired to control./Faulty compressor wiring.
8Low line voltage./ High line voltage.
9Control detects secondary voltage less than 18 VAC./Transformer overloaded./Low line voltage.

Not displayed No current through run or start windings./Compressor run winding is open./Compressor not properly wired to control./Faulty compressor wiring./Failed compressor run capacitor./Faulty run capacitor wiring.

fault-codes

Goodman AC Troubleshooting

Status LED: Green “POWER”

Status LED Description: Module has power

Status LED Troubleshooting: Supply voltage is present at module terminals

Status LED: Red “TRIP” 

Status LED Description: Thermostat demand signal Y1 is present, but the compressor is not running

Status LED Troubleshooting:

  1. Compressor protector is open
  2. Outdoor unit power disconnect is open
  3. Compressor circuit breaker or fuse(s) is open
  4. Broken wire or connector is not making contact
  5. Low pressure switch open if present in system
  6. Compressor contactor has failed open

Status LED: Yellow “ALERT” Flash Code 1 

Status LED Description: Long Run Time, Compressor is running extremely long run cycles

Status LED Troubleshooting:

  1. Low refrigerant charge
  2. Evaporator blower is not running
  3. Evaporator coil is frozen
  4. Faulty metering device
  5. Condenser coil is dirty
  6. Liquid line restriction (filter drier blocked if present in system)
  7. Thermostat is malfunctioning

Status LED: Yellow “ALERT” Flash Code 2

Status LED Description: System Pressure Trip Discharge or suction pressure out of limits or compressor overloaded

Status LED Troubleshooting:

  1. High head pressure
  2. Condenser coil poor air circulation (dirty, blocked, damaged)
  3. Condenser fan is not running
  4. Return air duct has substantial leakage
  5. If low pressure switch present in system, check Flash Code 1 information

Status LED: Yellow “ALERT” Flash Code 3

Status LED Description: Short Cycling Compressor is running only briefly

Status LED Troubleshooting:

  1. Thermostat demand signal is intermittent
  2. Time delay relay or control board defective
  3. If high pressure switch present go to Flash Code 2 information
  4. If low pressure switch present go to Flash Code 1 information

Status LED: Yellow “ALERT” Flash Code 4

Status LED Description: Locked Rotor

Status LED Troubleshooting:

  1. Run capacitor has failed
  2. Low line voltage (contact utility if voltage at disconnect is low)
  3. Excessive liquid refrigerant in compressor
  4. Compressor bearings are seized

Status LED: Yellow “ALERT” Flash Code 5

Status LED Description:  Open Circuit

Status LED Troubleshooting:

  1. Outdoor unit power disconnect is open
  2. Compressor circuit breaker or fuse(s) is open
  3. Compressor contactor has failed open
  4. High pressure switch is open and requires manual reset
  5. Open circuit in compressor supply wiring or connections
  6. Unusually long compressor protector reset time due to extreme ambient temperature
  7. Compressor windings are damaged

Status LED: Yellow “ALERT” Flash Code 6

Status LED Description: Open Start Circuit, Current only in run circuit

Status LED Troubleshooting:

  1. Run capacitor has failed
  2. Open circuit in compressor start wiring or connections
  3. Compressor start winding is damaged

Status LED: Yellow “ALERT” Flash Code 7

Status LED Description: Open Run Circuit, Current only in start circuit

Status LED Troubleshooting:

  1. Open circuit in compressor run wiring or connections
  2. Compressor run winding is damaged

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