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Hi Guys, just to let you know that having adjusted the value as suggested, it has made a huge difference, and we are now getting both HW and CH when selected together on the programmer. Thank you for your help and advice, which has been very much appreciated, and saved us more outlay. :D...

Hi Guys, yes there is a valve on the outflow pipe. I'll adjust as suggested and let you know what happens later. Thanks for your responses. :) Cheers Bill

Hi Steve, Sorry I'm a total novice so you've already lost me here. What am I looking for? :?

Hi Kev, The valve looks like your top photo. It is marked as a Honeywell V4073A1 039 if that means anything to you?

This is a new problem, the system worked fine last season, albeit the heating was a bit slow, but nothing to worry about. I agree with you on the money front, perhaps we've been a bit to hasty?

Hi I would really apprecaite some advice here, as i'm not great with DIY, and i'm getting the run around. Problem: When selecting either HW or CH on the programmer (Landis & Gyr RWB2) everything works as it should, however if we select HW/CH together the HW works fine but only the first...