Hi all, wonder if you could give some advise. To cut a long story short. I have problems getting any radiators warm. I have an open vented system. Hot water works fine, 3 way valve works fine, new pump fitted but pipe to heating from 3 way valve only gets hot for about a metre and thermostats is new. Pipe is 15mm so I think my whole heating circuit is 15mm, I have tried powerflushing but still no joy. I'm confident no air is in system and feed pipe can't be blocked as I ran with hose on bleed valve and water flow was fine. The only thing I can assume now is that the 15mm piping system is blocked, do you think this is the right conclusion? Time to renew piping? Thanks all
Thanks Ericmark, I've given that a try today. I could feel warm water come up return pipe and warm water up flow pipe when I switched. I'm getting a good flow of water out of Bleed nipple on both flow and return but when I shut bleed back up heat disappears again. So confused.
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