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Hi, I've installed it as per a previous post on this but it still only seems to fire when I press the hot water button. When turn up the heat, nothing happens. Photos show the previous receiver wiring with this new one. In N, L, 1 and 3 as shown before

Ok sorry, will do

Guys, can you help me? I've wired it up as instructed but it only fires when the hot water button is pressed rather than the heating button