What does the Worcester Bosch A1 fault code mean?

Your boiler is failing to light the internal flame needed to heat your water, so it has safely shut itself down to prevent gas from building up.

How much does it cost to fix Worcester Bosch error code A1?

Typical repair cost for the Worcester Bosch A1 fault is £150-350 including labour.

Flame not detected

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

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.

7 signs repair isn't worth it anymore.