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I have a wall mounted thermostat at the top of the stairs where there is a radiator within 4 metres. As the location is relatively enclosed the heating doesn't seem to be working very efficiently. Is there any mileage if I changed to a wireless thermostat instead and if I do how does that...

Ruth wrote "Hello there, I've just moved into a house, which has Comap thermostatic radiator valves. The valves have a grey and a black plastic slides that pull out from the bottom of the knob. Could anybody tell me the purpose of these please? I've had a look on the internet but no joy...