What you find on this page:
Firebird Boiler Error Codes
|E1||Control thermistor fault|
|E2||Flue thermistor fault|
|E3||Flue thermistor fault|
|E5||Burner fault (possibly burner lockout)|
|Thermostat at a high limit (cuts off)||Reset boiler|
Occasionally some things can go wrong, that’s why we’ve created our handy at-a-glance table of Firebird error codes and a guide to Common Firebird Problems and Repair.