Ideal · Logic MAX Heat2

Overheat Lockout

Logic MAX Heat2 (H12 / H15 / H18 / H24 / H30)

What Overheat Lockout means

Overheat lockout.

Home step: With the boiler off and the system cold, follow the guide to check and restore system pressure, check that radiator and boiler valves are open, and restart the boiler.

Gas Safe registered engineer: Contact the installer if the fault persists after the guide actions.

Find a Gas Safe engineer

A boiler fault code alone is not a gas or carbon-monoxide emergency. If you smell gas, a CO alarm sounds, or someone has possible carbon-monoxide symptoms, leave and call 0800 111 999 from outside.

Official source: Ideal Logic MAX Heat2 User Guide · UIN 228292 A08 (07/2023) · §1.8 Display Functions – Fault Messages, code Overheat Lockout, printed p. 7