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Hi All, I am trying to figure out the correct wiring for a Horstmann wireless thermostat that I have been too chicken to attempt for over a year now! I have mapped the wiring in my junction box and attach a wiring diagram. Forgive the schoolboy approach with graphics, I have no knowledge...

Hi All, hoping somebody could give me some pointers with this problem. Sorry if any of the details below are not relevant, but I figure it best to describe in full what I have tried and noted. Glowworm Ultracom 24hxi condensing boiler in airing cupboard with HW cylinder Drayton LP722...