Honeywell make a wireless roomstat that is a basic turn up and down type model number Y6630D1007. To wire it up to a combi you only need a 4 core cable, in the boiler you connect it to the live and neutral and then take the link out and connect the two switch wires. The instructions are simple...
Got a problem with alpha ocean 240e.The hot water flowrate is fine but the temperature is only luke warm.If you close the tap to a trickle the it gets hot. The problem has happened before and an engineer descaled the heat exchanger and it worked fine for about a year. The heating side is fine...