BoilerFaultCodes
Firebird Boiler Fault Codes
62 fault codes across 9 Firebird boiler models — explained in plain English.
Irish manufacturer specialising in oil boilers. Popular in rural UK and Ireland.
Just want the most common Firebird problems?
The top 8 faults across the whole Firebird range — causes, DIY checks, repair costs.
High-severity Firebird fault codes
E1 E2 E3 E5 E1
Your boiler's internal temperature sensor has stopped communicating correctly with the main control board, preventing the system from heating up.
Enviro 15-20
Your boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases, causing the system to shut down for safety.
Enviro 15-20
Your boiler has detected a problem with the sensor that monitors exhaust gas temperatures, causing the system to shut down for safety.
Enviro 15-20
Your boiler's burner has stopped working correctly and has entered a safety lockout mode to prevent damage.
Enviro 15-20
Your boiler's internal temperature sensor has stopped sending the correct information, preventing the system from running safely.
Enviro
All models