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thanks Tony - You'll have to forgive me - what is the APS and where would I find that? Thanks again. Dave

They did say there is a one in a million chance that it would be the heat exchanger plate ... but have no other advice. I appreciate that they are loathed to admit there could be a problem with the boiler, even though it is out of warranty! But I really am running out of ideas - I took the...

I am replacing the valve tonight. I spoke with Halsted earlier who send if the water is leaking in the boiler and I can't see it - and it isn't coming out of the pressure release valve it could be the heat exchange plate? Has anyone ever known that happen? thanks again.

Hi Tony - I don't know what a EXV is - and subsequently wouldn't know how to check it is leaking air. Where would I find it on my boiler? Thank you.

Thnaks Mandate. I'll check the valve and see if it is leaking either water or air; I do recall putting 10psi into it last week (with the boiler water pressure at 0) and it then being 4 or 5psi three or four days later with no water pressure in the boiler - which would suggest that there is a...

I have re-filled the expansion vessel to 10psi after being told so by Halsted; then I have re-filled the boiler to 1bar. And it still lose pressure. I take the water out the boiler by either using the pressure release valve as i have had to replace it or recently I changed the isolation...

Thanks Mandate. I up the pressure in the boiler to 2bar when I isolate the boiler; Halsted said i'd force a leak far more easily. I have changed the pressure release valve and have a bag on the back of that pipe to check for leaks; again no leaks. Could it be that the expansion chamber is...

Hi - I am experiencing pressure loss in my Halsted Ace High Boiler. I have checked my radiators; 95% of the pipe work (the rest is under concrete!) and I have also have put leak sealer into the heating system with no joy. This has led me to believe that I am losing pressure in my boiler...