Many thanks for the quick response twgas. I will check for a leak from the valve today. The pressure does seem to be pretty constant when the CH is off so your second diagnosis re the pressure vessel may be the one.
Is this a situation where my BG Homecare is will get some more use?
Morning all.
Looking for a little advice regarding my Puma 80.
Its in a ground floor one bed flat. I recently, (about 3 weeks ago) had a problem where the pilot light would not come on, I got an engineer out who said the thermocouple had gone and replaced it. Things have been working fine...