Main Boiler Error Codes

All Main Boiler Error Codes

Main boilers (part of Baxi group) use the same error code system as Baxi. Here is the complete list:

Code	Meaning	Quick Fix	DIY?
E20	NTC flow sensor fault	Reset boiler	No
E28	Flue sensor fault	Reset boiler, check flue terminal is clear	No
E40	NTC return sensor fault	Reset boiler	No
E50	NTC DHW sensor fault	Reset boiler	No
E55	PCB configuration fault	Reset boiler	No
E78	Pressure sensor fault	Check pressure level, reset boiler	No
E109	No circulation detected	Check pump operation, bleed radiators	Partial
E110	Overheat protection activated	Let boiler cool, check radiators are on, bleed system	Partial
E117	High water pressure	Bleed a radiator to release excess pressure	Partial
E118	Water pressure too low	Top up pressure using filling loop to 1.0-1.5 bar	Yes
E119	Low water pressure	Top up pressure using filling loop to 1.0-1.5 bar	Yes
E125	Primary circulation fault	Check pressure, bleed radiators, check pump	Partial
E128	Flame lost during operation	Check gas supply, thaw frozen condensate pipe	Partial
E131	Flow temperature sensor fault	Reset boiler	No
E133	Ignition failure - no flame detected	Check gas supply, thaw frozen condensate, reset boiler	Partial
E134	Flame extinguished	Check gas supply, reset boiler	Partial
E154	Pump fault	Reset boiler	No
E160	Fan speed fault	Reset boiler, check flue is clear	No
E164	No flame signal detected	Reset boiler, check gas supply	No
E168	Ignition fault	Check gas supply, thaw condensate pipe, reset	Partial