What does the Ideal F2, FN or LN fault code mean?

Your boiler has lost its flame suddenly and has shut down as a safety precaution, meaning you will have no heating or hot water until it is fixed.

How much does it cost to fix Ideal error code F2, FN or LN?

Typical repair cost for the Ideal F2, FN or LN fault is £120-£350 including labour.

Check if other gas appliances, like your hob, are working to ensure your gas supply is active.

Flame loss

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

Almost always a stuck diverter valve on combis.

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.