What does the Baxi 133 fault code mean?

Your boiler has tried to ignite but failed to stay alight, which is often caused by a lack of gas supply or a blocked condensation pipe.

How much does it cost to fix Baxi error code 133?

Typical repair cost for the Baxi 133 fault is £100-£350 including labour.

Can I fix Baxi fault code 133 myself?

Check that your gas supply is turned on and you have credit on your meter.

Baxi 133 Fault Code: What It Means & How to Fix It

Technical description

Safety time to establish flame exceeded

What causes this fault?

This fault occurs when the boiler's control system attempts to light the burner but cannot detect a stable flame. The most common reasons are a temporary interruption in the gas supply, an ignition electrode that is too dirty to spark, or a blockage in the pipe that carries away waste water.

This fault is particularly common during freezing winter temperatures, as the external condensation pipe can freeze solid and prevent the boiler from firing.

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

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Your boiler has tried to ignite but failed to stay alight, which is often caused by a lack of gas supply or a blocked condensation pipe.

Technical description

What causes this fault?

Engineer required

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