Boiler Pressure Guide – At a Glance

Pressure Reading	Status	What to Do
0–1 bar	Too low	Top up using the filling loop (check manual)
1.5–2 bars	Normal	Safe operating range
2.5+ bars	Too high	Bleed radiators or drain off excess water
Fluctuating wildly	Fault suspected	Call a Gas Safe engineer to check expansion vessel or relief valve

HomeService.Insure Safety Disclaimer

At HomeService.Insure, we encourage safe and sensible DIY, but your safety always comes first.

Only attempt basic checks and fixes if you feel confident.
Stop immediately if you notice burning smells, scorch marks, leaks, or anything that looks unsafe.
Never attempt electrical or gas repairs beyond simple resets or checks.
For complex, repeated, or potentially dangerous problems, always call a qualified Gas Safe engineer (for heating) or a certified electrician (for electrics).

By following this guidance, you reduce risks — but professional help should always be your first choice if there’s any doubt.