| LED blinks | Meaning |
|---|---|
| 1 | Failed to detect flame within three attempts for ignition, 1-hour lockout. |
| 2 | The pressure switch is stuck open or induced draft blower problem detected. |
| 3 | The limit switch is open, or the roll-out control is engaged. |
| 4 | The pressure switch is stuck closed, or the switch won’t open. |
| 5 | Line and Neutral are reversed. Control board or the furnace’s ground could be defective. |
Now you know what the issue is, Let’s Go Find Some Easy-Fix Solutions
