Recent content by Womble123

After all that, it WAS the pipe between boiler and PV. Not completely blocked (explaining why water comes out when disconnected) but blocked enough to cause a problem. Cleaned it through and now everything fine. Sadly I had to pay £185 to a Worcester/Bosch engineer (they own Boulter now) to come...

Two more questions: 1. I've just seen the price of expansion vessels - when you say (oilman), to fit a 32 litre vessel, I presume it's ok to add 14 litres (if they do 'em that size) to my existing 18 litres rather than buy 1 big vessel? 2. How do I calculate my system capacity? I have 22...

Hi - thanks for feedback. I have now checked the pipe from boiler to PV and there is no blockage, water flows out. I have also increased the pressure in the PV from 1 bar to 1.5 bar (which my boiler manual says is the max recommended for system) but this has made no difference and the boiler is...

Thanks for the input - it is a large system (I've got a 7 bedroom guest house), the expansion vessel is 18 litres. I should also add that the boiler has been working perfectly well since installation some 6 years ago - I don't understand why the vessel would suddenly be inadequate.

Thanks for the help. I've now spoken directly to Boulter and they reckon the problem is a faulty Heat Exchanger. I've also seen this on other posts. Probably expensive and not sure my enginner is up to it - why couldn't he suggest that! Will keep this thread going (hopefully with an eventual...

Amendment - sorry to mess around but I beleive the PRV is now faulty, even if it wasn't before. Losing about 2 or 3 litres a day. This would explain the drop in pressure but I'm still at a loss as to what is causing the excessive rise in pressure on topping up and re-starting the boiler. I'm...

Forgot to say that the PRV also checked out ok and the AAV doesn't seem to be hissing/leaking, certainly not noticeable anyway.

I have an oil-fired Boulter Classic boiler, sealed system. The pressure of the system is going right up and then right down - exactly as would be expected for a faulty pressure vessel....except that there is nothing wrong with it, I've had it checked by an OFTEC engineer. I read in the FAQ that...