Originally Posted by
guyank
Did you ever find a resolution to this? I have a similar problem in one zone, the lounge. When I get up in the monring, it's set to 15C still and not to 20C until 90 minutes later. However, Optimum Start doesn't indicate on for that zone on the controller and the temperature has already risen to 20C (from about 17c overnight) with the radiators very hot. It reaches 21.5C (indicated on the controller, not a different thermometer) before it starts to cool down. The HR92s are able to fully shut as at other times of day the radiators are cold when others in the house are hot. It's been installed for 2 weeks now and every other zone seems to have learnt but this one.