What does the Baxi H.03 – .02 fault code mean?

Your boiler has lost its flame while it was running, which means it has stopped providing heating and hot water for safety reasons.

How much does it cost to fix Baxi error code H.03 – .02?

Typical repair cost for the Baxi H.03 – .02 fault is £120-350 including labour.

Can I fix Baxi fault code H.03 – .02 myself?

Check if other gas appliances in your home, like a hob, are working to confirm gas supply.

Baxi H.03 – .02 Fault Code: What It Means & How to Fix It

Technical description

Flame error – no flame during operation.

What causes this fault?

This fault occurs when the boiler successfully lights but the internal sensors lose track of the flame while it is firing. It is often caused by a dirty or worn-out sensing probe that can no longer 'see' the fire, or a faulty gas valve that isn't providing a steady enough flow of fuel to maintain the combustion. Without a stable signal that the flame is safely lit, the boiler shuts down as a protective measure.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register →

Your boiler has lost its flame while it was running, which means it has stopped providing heating and hot water for safety reasons.

Technical description

What causes this fault?

Engineer required

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