What does the Heatline F1 fault code mean?

Your boiler has switched itself off because it has reached an unsafe temperature and needs to cool down before it can be restarted.

How much does it cost to fix Heatline error code F1?

Typical repair cost for the Heatline F1 fault is £90-180 including labour.

Check that all radiator valves are fully open

Lockout due to overheating. This may be the overheat thermostat or thermal fuse.

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

Work through these before the call-out.

Each noise points to a different fault.

Lockout fault with a reset-needed pattern.