Hi
I have a 6 year old Potterton puma 100 that keeps depresurising when it cools down, I fill to one bar switch on and as the boiler heats up the pressure rises to 3 bar, pressure relief blows etc. If I leave the boiler running I can keep it running for days at about 2 bar. If I switch off pressure drops top zero. My first thought was a leak but now thanks to the forum I recon the expansion vessel has gone. How can I check and should I replace with same or fit external vessel? If so any recomendations
I have a 6 year old Potterton puma 100 that keeps depresurising when it cools down, I fill to one bar switch on and as the boiler heats up the pressure rises to 3 bar, pressure relief blows etc. If I leave the boiler running I can keep it running for days at about 2 bar. If I switch off pressure drops top zero. My first thought was a leak but now thanks to the forum I recon the expansion vessel has gone. How can I check and should I replace with same or fit external vessel? If so any recomendations