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Hi I purchased a UH8-RF with 3 Neoair stats to control a combi system with rads upstairs and 2 UFH zones downstairs in an S Plan format with 2 x 2 port valves. Just looking at the wiring diagram on the UH8-RF and wonder why it shows using the boiler output along with the valve switch (grey and...

Hi I've read loads of articles on this programmer which I have just connected to a ecotec 837 combi and think I understand most of it, but I have a few questions. 1. What are the radiator, tap and circulating indicators in the top right for? I thought that they would indicate when these...

My dad has just had a Vaillant 837 boiler fitted which is working great except for the shower. At the same time as the boiler was fitted, the old pumped shower was removed and a Mira Infuse 360 fitted. This was squealing and a check of the pressure at the shower showed 5.6 bar, so a pressure...

Hi I currently have a standard old (nearly 20yrs) Potterton boiler with tanks in the loft and cylinder in the cupboard. I run a Mira Event XS power shower off this, I believe to be 14l/min and it gives very high flow rates. I am looking to change my boiler for a Vaillant 937 and wondered...