Hoping someone can help!
I have the Glowworm compact 80e boiler and the pressure keeps rising to 3 bar and then the relief valve kicks in, here is what we have tested to rule out so far.
The filling supply/loop is ok, have taken and left this off to check there is no small leak letting water in.
Expansion vessel was checked by a plumber, no leaks, water coming out, all seems fine and was pumped up/recharged.
Basically, we fitted a new radiator, and the problem came about after this and a prolonged period of the heating not being in use. When we fitted the new rad and had to let some water into the system to get the pressure back up, (the wife) didn't shut the valve off completely and the pressure went up to 3 bar before i noticed and caused a tiny leak in the new radiator. I let some pressure out, leak stopped, figured all was good.
Then a few days later noticed the pressure went back up to 3 bar, so i let some pressure out again, and it was fine for a few days, then pressure went back up.
I figured out it was when the boiler kicked off, or was turned off over night was when the pressure seemed to be going back up, and now it does it right away every night.
When my plumber friend came round and checked the expansion vessel and recharged, it was fine again for a couple days, then same issue again after turning down/off over night, pressure back up to 3 bar.
The hot water has also seemed temperamental whilst this has been happening, shower/taps taking longer to heat the water than usual?
does it sound like the plate heat exchanger? or is there anything from putting the new radiator on it could be? we checked all the pipe work for leaks and it seems ok, it all seems to have started from that initial mistake of leaving the filling loop open!
to check if it the plate heat exchanger is the issue, do i just turn off the cold water in supply to the boiler and then see if the pressure rises once i have let some out? or do i turn off the mains water supply which is near the boiler and not use any water to check?
would i leave the heating/boiler off as well when doing this, and not use any hot water??
Just want to be sure so that i don't waste my friends time, and my money in unneeded parts!
I have the Glowworm compact 80e boiler and the pressure keeps rising to 3 bar and then the relief valve kicks in, here is what we have tested to rule out so far.
The filling supply/loop is ok, have taken and left this off to check there is no small leak letting water in.
Expansion vessel was checked by a plumber, no leaks, water coming out, all seems fine and was pumped up/recharged.
Basically, we fitted a new radiator, and the problem came about after this and a prolonged period of the heating not being in use. When we fitted the new rad and had to let some water into the system to get the pressure back up, (the wife) didn't shut the valve off completely and the pressure went up to 3 bar before i noticed and caused a tiny leak in the new radiator. I let some pressure out, leak stopped, figured all was good.
Then a few days later noticed the pressure went back up to 3 bar, so i let some pressure out again, and it was fine for a few days, then pressure went back up.
I figured out it was when the boiler kicked off, or was turned off over night was when the pressure seemed to be going back up, and now it does it right away every night.
When my plumber friend came round and checked the expansion vessel and recharged, it was fine again for a couple days, then same issue again after turning down/off over night, pressure back up to 3 bar.
The hot water has also seemed temperamental whilst this has been happening, shower/taps taking longer to heat the water than usual?
does it sound like the plate heat exchanger? or is there anything from putting the new radiator on it could be? we checked all the pipe work for leaks and it seems ok, it all seems to have started from that initial mistake of leaving the filling loop open!
to check if it the plate heat exchanger is the issue, do i just turn off the cold water in supply to the boiler and then see if the pressure rises once i have let some out? or do i turn off the mains water supply which is near the boiler and not use any water to check?
would i leave the heating/boiler off as well when doing this, and not use any hot water??
Just want to be sure so that i don't waste my friends time, and my money in unneeded parts!
