F
Firebird Fault Codes
Select a fault code to see its meaning, common causes and how to fix it.
- E1 The E1 code on a Firebird oil boiler indicates a fault with the control thermistor — the temperature-sensing component… Read more →
- E2 The E2 code on Firebird Envirogreen condensing boilers signals that the control board has detected an issue with the… Read more →
- E3 The E3 code on a Firebird boiler signals a problem with the flue thermistor — a small temperature sensor positioned in… Read more →
- E4 The E4 code on a Firebird oil boiler indicates a problem with the boiler's control thermistor — the temperature sensor… Read more →
- E5 The E5 code on a Firebird oil boiler signals that the burner has attempted to fire but failed to establish or confirm a… Read more →