Boiler pressure loss🙄

[Sfroggat]

I have an 8 year old Potterton HE Gold combi boiler losing pressure.
I have isolated the central heating to leave just water heating and it is fine. As soon as the central heating is introduced the pressure drops to zero within an hour. I have had floor boards etc up but cannot find a leak anywhere. It was working fine until I removed a couple of radiators to decorate.
Any suggestions?
Cheers
Mark

 

[Deleted member 120897]

Do you mean you isolated the flow and return or just not use the heating no when the heating is on the pressure is lost?

 

[Sfroggat]

Do you mean you isolated the flow and return or just not use the heating no when the heating is on the pressure is lost?

Isolated the flow and return

 

[Deleted member 120897]

Isolated the flow and return

Then you have a leak or there’s potential trapped air. Top the pressure to approx 2-2.5 bar and check all rads and maybe lift some more floorboards, especially near the ones removed for decoration.

 

[Sfroggat]

Then you have a leak or there’s potential trapped air. Top the pressure to approx 2-2.5 bar and check all rads and maybe lift some more floorboards, especially near the ones removed for decoration.

Thanks for the reply, I’ll try your suggestions when I am off again
Cheers
Mark