What does the Grant Boiler Fault Finding 4 fault code mean?

Your boiler is struggling to keep its flame lit after it starts up, causing it to shut down for safety reasons.

How much does it cost to fix Grant error code Boiler Fault Finding 4?

Typical repair cost for the Grant Boiler Fault Finding 4 fault is £150-350 including labour.

Burner lights but goes to ‘lock-out’. If the flame is unstable, check the combustion settings.

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

Each noise points to a different fault.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.