Low
5 red on Ferroli Combi 77 FF Popular

Your boiler is currently taking a brief, scheduled pause to protect its internal parts before restarting your heating or hot water.

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Central Heating waiting time, a max. 3 minutes delay following shut off Boilerstat (63), Clock (62), Roomstat (72) or use of Hot Water

Community-sourced, unverified
We could not tie this code to a specific manual. Treat it as indicative only.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Wait for 3 to 5 minutes to see if the boiler restarts automaticallyEnsure your room thermostat or programmer is calling for heatCheck that your boiler pressure is between 1 and 1.5 bar

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Avoid the next call-out bill

A cover plan would handle faults like 5 red: no call-out fees, no surprise bills.

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