Potterton Gold - pressure issues

[Adam12345]

Hi,

I have a problem with my Potterton boiler pressure. When the heating has been turned off for a bit I wont be able to turn it back on because of a low pressure warning.

Then when I slowly add water back into the system (just enough for it to start), the pressure will then continue to increase into the red zones and I have to bleed the rads to get it back into the green. After that it will be stable so long as the heating is on.

Any ideas on what may have failed? I cannot see any obvious leaks, had the floor boards up anyway

Thanks

 

[Adam12345]

Does pressurising the pressure vessel sound like the right idea? FAQs

 

[CBW]

Sounds like an expansion problem, to remove the inner cover (to gain access to vessel) you need to be able to carry out essential checks afterwards.