Goodman Error Code F04: Goodman Code F04 - High Limit Switch Open
Warning: Your Goodman furnace has shut down due to a high limit error. This prevents the furnace from overheating, but it needs professional diagnosis to restore heat.
How to Fix Goodman Code F04
- Step 1: Check and replace your air filter. A dirty filter is the most common cause. Use the filter size printed on the old filter to buy a new one.
- Step 2: Ensure all return air vents are open and not blocked by furniture or rugs. Good airflow is key.
- Step 3: Reset the furnace by turning off the power at the breaker for 60 seconds, then turn it back on. If the error returns, call a qualified HVAC technician.
How to Reset Goodman Code F04
- 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 F04 mean?
The F04 error code on your Goodman furnace indicates that the high limit switch has tripped. This switch is a safety device designed to shut down the furnace if it gets too hot, preventing damage and potential fire hazards. When the furnace overheats, the high limit switch opens, cutting off power to the gas valve and blower motor. The furnace will then display the F04 error, indicating the problem. It's important to address this issue promptly, as repeated overheating can damage components and leave you without heat.
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 |
|---|---|---|
| High Limit Switch | B13701-22 | — |
| Blower Motor | — | — |
| Air Filter | — | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| STEADY-ON | Normal Operation | Info |
| 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 |