Thanks for the reply. My radiators do have thermostats fitted and I've been told to keep them uncovered which I am now doing. However the engineer from the people who installed the system have told me I cannot use my washing machine and run my heating at the same time. They say I must change my washing machine to one that only takes cold water. I rarely run my machine on a hot wash. Other people I have spoken to don't seem have this problem. Thanks
Sue
February 2007