Goodman Error Code F02: Goodman Code F02 - Rollout Switch Open
How to Fix Goodman Code F02
- Step 1: Turn off the furnace immediately at the breaker to prevent further gas flow and potential hazards.
- Step 2: Ensure that all carbon monoxide detectors in your home are functioning properly.
- Step 3: Contact a qualified HVAC technician to inspect and repair the furnace. Do not attempt to restart the furnace until it has been professionally serviced.
How to Reset Goodman Code F02
- 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.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Goodman Error Code F02 Mean?
The F02 error code on your Goodman furnace indicates that the rollout switch has tripped. This switch is a critical safety device designed to shut down the furnace if it detects flames where they shouldn't be – specifically, outside the normal combustion chamber. Rollout switches are manually reset, meaning they won't automatically allow the furnace to restart until the problem is fixed and the switch is physically reset. Ignoring this error can lead to fire or carbon monoxide poisoning, so it's important to address it immediately. When the rollout switch trips, it cuts off the gas supply to the burners, preventing further fuel from entering the system and exacerbating the problem. This is a fail-safe mechanism to protect your home and family. The F02 error code is a clear sign that something is seriously wrong with the combustion process, airflow, or venting of your furnace.
Common Causes
- Blocked or restricted flue/venting, causing combustion gases to back up.
- Dirty burners causing flame rollout.
- Cracked heat exchanger allowing flames to escape.
- Overfiring due to incorrect gas pressure.
- Failed or misaligned flame sensor causing erratic burner operation.
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| Rollout switch is tripped (open) | Visually inspect the flue for obstructions or damage | Flue is clear and properly connected |
| Flue is clear | Inspect burners for dirt, debris, or damage | Burners are clean and properly aligned |
| Burners appear normal | Check gas pressure at the gas valve with a manometer | Gas pressure matches the rating plate specifications |
| Gas pressure is correct | Inspect the heat exchanger for cracks or signs of failure using a combustion analyzer | Heat exchanger is intact with no signs of cracks or leaks |
Applicable Goodman Models
Recall Notices
Issued: November 1, 2021
Affected models: Molded plastic evaporator coil drain pans in up-flow condensing gas furnaces
Drain pans can overheat, melt, and deform, posing a fire hazard. Recall expanded January 2024.
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Rollout Switch | B11721-13 | — | Find Part |
| Flame Sensor | 0130F00005S | — | Find Part |
| Gas Valve | B11726-18 | — | Find Part |
Related Codes on Same Models
Other codes that affect the same Goodman model families as F02.
| Code | Description | Severity |
|---|---|---|
| 1 | System Lockout | Warning |
| 2 | Pressure Switch Stuck Closed | Warning |
| 3 | Pressure Switch Stuck Open | 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 |
| STEADY-ON | Normal Operation | Info |