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Over the weekend, I've avoided using the hot tap in the bathroom, where the boiler is - and there's been no pressure drop at all. Everything is the same - I haven't done or not done anything differently, apart from avoid using this tap. Can't see why it should make a difference, or even IF it...

Thanks, I'll speak to the engineer on Monday, and see if we can figure it out. I'm starting to avoid using hot water at all, since that stops the pressure from dropping any further! I thought I'd cracked it last night, when I can home and discovered a puddle in the upstairs bathroom, and drops...

Thanks for your reply, bellairaphon, I really appreciate it. Can a split be fixed, or is it a replacement job? By the time you add on labour, this could be really expensive, if it needs replacing - the boiler must be at least 6-8 years old, not sure as it was in the house when I bought it 2...

Hi there, You have already helped me here, as a couple of weeks ago, my DHW was running intermittently hot and cold - the boiler was cutting out after about 30 seconds, then re-firing. After reading advice here, I got the boiler engineer in, and he removed the heat exchanger, etched it with...