Hi Tom, thank you so much for replying! That's not it - the time seems to be set correctly - the radiators should turn themselves on at 8pm and be on till 6am. While they sometimes do start getting warm at 8pm, they don't seem to be working at 5am. I honestly don't know what the issue is.

Everything's set up according to the awesome instructions and yet when the time comes and the heaters should be working...nothing happens. However, they turn themselves on at a different time than specified. I don't know where I went wrong. Any suggestions?