Ideal · Logic Combi ESP1

FU

Logic Combi ESP1 — models 24 / 30 / 35

What FU means

Flow/return differential > 50°C.

If you smell gas, a CO alarm sounds, anyone feels unwell, or there is an unsafe flame, leave and call 0800 111 999 from outside.

Safe check: No homeowner action is listed. Do not reset or adjust the boiler; contact Ideal or arrange a Gas Safe registered engineer.

Gas Safe registered engineer: Contact Ideal or arrange a Gas Safe registered engineer for diagnosis.