Good morning, I wondered if someone could give me some help please. I have had a new boiler fitted and have a center thermostat but nearly every time I go to turn the heating on or off the screen goes blank. On the first one I had I had to completely reset the time date etc now I am onto the second unit and still am having the same problem. I changed from reducing the temp every time to just turning it on snd off. It has now started to come back on after a few seconds but still goes blank....cam anyone help please surely this is not normal. I have changed the location where I keep it but to no avail....can anyone give me any help please....