All Error Codes
High Medium Low
| Code | Description | Severity | Quick Action |
|---|---|---|---|
| 1 | Ignition Failure | Medium | Call tech support |
| 2 | Pressure Switch Stuck Closed | Medium | Call tech support |
| 3 | Pressure Switch Stuck Open | Medium | Call tech support |
| 4 | High Limit Switch Open | Medium | Call tech support |
| 5 | Flame Rollout Switch Open | Medium | Check gas & reset |
| 6 | Pressure Switch System Lockout | Medium | Call tech support |
| 7 | Ignition Lockout | Medium | Call tech support |
| 8 | Control Board Error | Medium | Call tech support |
| 9 | Line Voltage Polarity Incorrect | Medium | Call tech support |
| E250 | Lennox Code E250 - Indoor Blower Communication Error | Medium | Check wiring |