What does the Ideal FU fault code mean?

Your boiler has shut down because it is getting too hot too quickly, likely because water isn't circulating through the system properly.

How much does it cost to fix Ideal error code FU?

Typical repair cost for the Ideal FU fault is £100-£350 including labour.

Check that all radiator valves are turned on

Difference greater than 50c – check isolation valves are open

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.

Sludge build-up — needs flushing, not bleeding.

7 signs repair isn't worth it anymore.