What does the Heatline F2 fault code mean?

Your boiler has shut itself off because it has detected that it is running too hot and could potentially damage itself.

How much does it cost to fix Heatline error code F2?

Typical repair cost for the Heatline F2 fault is £120-220 including labour.

Overheating safety thermostat fault

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.

Almost always a stuck diverter valve on combis.

Work through these before the call-out.