Nordyne Gas Furnace: G7SC
Re: Furnace Lockout Codes
| Furnace Control Board Fault Conditions | ||
| GREEN | RED | Description |
| Off | Off | No Control Power |
| Flash | Flash | L1/Neutral Polarity Reversed |
| Alternating | 1 Hour Lockout | |
| On | On | Normal Operation |
| On | Flash | Pressure Switch Stuck Closed |
| Flash | On | Pressure Switch Open when is should be Closed |
| Flash | Off | Limit Switch Open |
| On | Off | Motor Fault |
| YELLOW | Description | |
| Flashing | Low Flame Signal | |
| On | Flame Present | |
| "Fixed Speed" Motor Control Board Fault Conditions | ||
| GREEN | RED | Description |
| Off | Off | No Control Power |
| On | On | Normal Operation |
| On | Flash | Motor Fault |
| Flash | On | Twin Fault (no motor fault) |
| Flash | Flash | Communication Fault |
| "Variable Speed" Motor Control Board Fault Conditions | ||
| GREEN | RED | Description |
| Off | Off | No Control Power |
| On | On | Normal Operation |
| On | Flash | Motor Fault |
| Flash | Flash | Communication Fault |