Lennox Rooftop Unit: TGA
Re: Heating Diagnostic/Fault Codes
| LED Flashes | Description |
| Slow Continuous | Normal - No Call for Heat |
| Fast Continuous | Normal - Call for Heat |
| Off | Internal Fault or No Power |
| On | Control Failure |
| 2 Flashes | Failed Ignition or Flame Loss |
| 3 Flashes | Roll-out Open or Pressure Switch Fault |
| 4 Flashes | Limit Open or Limit Open 3 Times |
| 5 Flashes | Flame Sensed with Gas Valve Off |