What does the Baxi E135 fault code mean?

Your boiler has lost its gas supply or cannot detect gas entering the system, meaning it cannot ignite to provide heating or hot water.

How much does it cost to fix Baxi error code E135?

Typical repair cost for the Baxi E135 fault is £120-350 including labour.

Check if other gas appliances, like a cooker or hob, are working to confirm your gas supply is active.

Interruption of gas supply (internal error)

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.