Boiler question

[Anthony1609]

I have a baxi combi he.

want to ask about the bar pressure, when heating is off the bar pressure is at 1 bar (green triangle)
when the heating is put on and the boiler display has reached the temperature of 80, the pressure is at 3 bar, it slow moves up as the temperature increases.
but the when all cooled down it returns to 1 bar and stays at that, I have never noticed this problem before, boiler been in 2 years, had the service down and had self bleeding valves fitted to all radiators.

Can an anyone tell me if this is normal

 

[Tjdservices]

You will get an increase in pressure when the heating is on due to expansion but 3 bar seems High, When was it serviced?

 

[Millsy 82]

You will need a gas safe engineer to look at it. It could be a fairly simple fix but you will need to go inside the boiler casing.

 

[ShaunCorbs]

As above get a gas safe eng out from 1-1.2 bar cold should be no higher than about 2.5 bar hot