What does the Baxi 133 fault code mean?

Your boiler is failing to light the gas or cannot stay lit, meaning it will not provide heating or hot water until the issue is resolved.

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

Typical repair cost for the Baxi 133 fault is £100-280 including labour.

Check if your gas supply is active by testing another gas appliance like a hob

Safety time to establish flame exceeded

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

Almost always a stuck diverter valve on combis.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.