Goodman Error Code 3: Pressure Switch Stuck Open
Warning: Your Goodman HVAC system has detected a pressure switch issue, which could lead to system damage if not addressed promptly.
How to Fix Goodman Code 3
- Check if your HVAC system is running. If it is, turn it off at the thermostat and at the circuit breaker to prevent further damage.
- Inspect the air filter. If it's clogged, replace it with a new one.
- Call a professional HVAC technician to diagnose and repair the issue. Do not attempt to open the unit or handle refrigerant lines yourself.
How to Reset Goodman Code 3
- Turn off the furnace power switch, usually located on or near the unit.
- Turn off the circuit breaker for the furnace. Wait 30 seconds.
- Restore power at the breaker and flip the furnace switch back on.
- Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.
What does 3 mean?
Goodman's error code 3 indicates that the pressure switch is stuck open. This switch is crucial for monitoring and controlling the refrigerant pressure in your HVAC system. When it's stuck open, it can't accurately sense the pressure, leading to potential system issues. This is typically caused by a faulty switch or low refrigerant levels, which can cause the switch to open prematurely.
Affected Models
Recall Notices
Goodman/Daikin Evaporator Coil Drain Pans Recalled Due to Fire Hazard
22-014
Drain pans can overheat, melt, and deform, posing a fire hazard. Recall expanded January 2024.
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Pressure Switch | G120002 | — |
| Refrigerant | — | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| STEADY-ON | Normal Operation | Info |
| 1 | System Lockout | Warning |
| 2 | Pressure Switch Stuck Closed | Warning |
| 4 | Open High Limit Switch | Warning |
| 5 | Flame Sensed With Gas Valve Off | Warning |
| 6 | Open Rollout Switch | Warning |
| 7 | Low Flame Signal | Warning |
| 8 | Ignitor Error | Warning |
| CONTINUOUS | Reversed Polarity | Warning |
| F01 | Goodman Code F01 - Ignition Lockout | Critical |