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Hi there I have an old Horsmann H37 controller which is not powering up my smart thermostat or firing up the boiler even for hot water even though it says it's on. Could this be a problem with the boiler or do I need a new controller? Thanks

Need some advice as to how to wire up my new Smart Thermostat (picture 1 below) My Old Thermostat has three wires red, blue and yellow( taped red for live) and runs on 3V (see picture 2) The new Smart Thermostat needs 240V independent for 3 and 4 as it is a dry contact. Just need to know...

Hi there would love some advice on how to wire old 2 way double light switch to a new double dimmable light switch (one is simply on/off). The old switch is as follows: top row: A 2way = 2 x red wires A 1way = 1 black, 1 blue B comm = yellow bottom row A comm = yellow B 2way = 1...

Hi I've recently put 3 smart switches in my home as obviously have a neutral set up. I'm looking to put an extra 3 gang switch downstairs but the 3 switch is on a slightly more complicated loop system. Below is a picture of the wiring with labeling where the common, L1 and L2 wires go. Really...