| Red LED blinks | Meaning |
|---|---|
| 1 | Flame sensor dirty or not properly aligned. |
| 2 | Pressure switch stuck open. |
| 3 | Limit switch open. |
| 4 | Pressure switch stuck closed. |
| 5 | Not applicable. |
| 6 | Line and Neutral reversed. |
- Green LED blinking:
- Rapid green flashing: Normal operation.
- Slow green flashing: Normal operation with call for heat.
- Rapid amber flashing: Flame sense current is below 1.5 microamps. Check and clean flame sensor. Check for proper gas flow.
- Slow amber flashing: Normal operation with call for heat.
- Rapid red flashing: Twinning error, incorrect 24V phasing. Check twinning wiring.
- Slow red flashing: Flame sensed with gas valve off (i.e. no call for heat).
Now you know what the issue is, Let’s Go Find Some Easy-Fix Solutions
