What does the Heatline F1 fault code mean?

Your boiler has shut down because it has reached an unsafe temperature and needs to cool down and be reset.

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

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

Switch off the electricity supply to the boiler and wait 15 minutes for it to cool down.

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.

Lockout fault with a reset-needed pattern.

Each noise points to a different fault.