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Hi, I'm currently having issues with my central heating system (oil boiler) following replacement of an old programmable controller and room thermostat. I have some electrical knowledge as an electrician but not specific to heating and controls. So the basics; I have an oil boiler located in...

Hi All, I'm replacing my old analogue thermostat (Sunvic TLX 2259), which currently has 4 wires, a brown, black, light blue and green yellow. Im replacing it with a Salus RT300 digital programmable room thermostat, which has 3 connections; Live, Switch Live and Earth. The controller is...