BoilerFaultCodesMain Boiler Fault Codes
127 fault codes across 7 Main boiler models — explained in plain English.
UK brand owned by Baxi Group. Budget entry-level boilers.
Just want the most common Main problems?
The top 8 faults across the whole Main range — causes, DIY checks, repair costs.
High-severity Main fault codes
E09 E15v E20 E28 E40
Your boiler has lost its electrical connection to the gas supply unit, meaning it cannot ignite to provide heating or hot water.
Eco Compact
Your boiler has detected an internal issue with the gas control system and has shut down as a safety precaution.
Eco Compact
Your boiler has detected a fault with the internal sensor that monitors the temperature of your central heating water, causing the system to stop working as a safety precaution.
Eco Compact
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.
Eco Compact
Your boiler has detected a problem with the sensor that monitors the temperature of the water returning from your radiators.
Eco Compact
All models