I had the unit professionally installed and had the fellow set the times aand temps. It works fine. PROBLEM: it does not fit our lifestyle to be on such a fixed schedule. I know how to use the hold button and that is a great tool. My desire is to have no preset scheduled events programed in the unit. I want every event to be manual and set at the time on an as need basis--you might say I want to zero out the numbers--Please help