Outdoor air temperature sensor fault. The integrated control module shows A2. The air conditioner or heat pump may show only this code, with no separate symptom line on this row.
Goodman A2 on the PCBHR104 chart is an outdoor air temperature sensor fault. Digit 2 is A and digit 1 is 2. Causes are a shorted sensor, an open sensor, a disconnected sensor, and a sensor out of range. The actions are to check the connection and replace an open or shorted sensor. It is not outdoor coil sensor A3, which the same chart ties to a heat pump that will not run in heating. The chart is repeated on PCBHR105 with the same fault text.
Likely causes
- Shorted outdoor air temperature sensor
- Open sensor
- Sensor disconnected
- Sensor out of range
Safe checks for A2
- Write down A2 before you turn power off. Digit 3 on this chart is blank
- Techniciancheck the sensor connection and replace an open or shorted sensor. Turn power off before the repair. The chart says to use the correct replacement part
Capacitors can hold a charge after the power is off. Safety terms.
When to call a pro
Call a licensed HVAC technician. This is a sensor circuit, not a filter code.
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