What does the Ideal H9/L9 fault code mean?

Your boiler has detected that the exhaust gases are becoming dangerously hot and has shut itself down to prevent damage or safety issues.

How much does it cost to fix Ideal error code H9/L9?

Typical repair cost for the Ideal H9/L9 fault is £150-300 including labour.

FLUE GAS OVERHEAT (displays 3 horizontal lines until temperature drops below 50oC)

This is a emergency 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.

Work through these before the call-out.

Lockout fault with a reset-needed pattern.