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Baxi Boiler Fault Codes

Fault code Fault


Central heating NTC fault


Flue NTC fault, air pressure switch fault, blocked flue, blocked condensate or wiring fault


Hot water NTC fault


Your boiler made have overheated - try bleeding your radiators


Water pressure too low


Circulation fault (primary circuit) - try bleeding your radiators


Flue NTC operated


Interruption of gas supply or flame failure - gas supply fault


Fan or fan wiring Fault


Pre-circulation fault

What is NTC?

An NTC or ‘Negative Temperature Coefficient’ is a type of thermistor (or thermal resistor).

Basically, it’s an electrical component that helps to regulate the temperature of your boiler. So, when you set your heating to a certain temperature it will make sure your boiler stays at that temperature.

Baxi affordable repair combi heat only combi boiler

Safety Warning

When your Baxi boiler error codes or fault lights flash, don’t do any repair work that involves working with gas as you are required to be Gas Safe Registered by law.

Here at Boiler Plan all our engineers are Gas Safe Registered and will do an amazing job with any Baxi boiler repair work you may need.

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