Found a icm 325h head pressure control energizing the reversing valve while in heat trying to change over to a/c while heat is runnng on a carrier gemini split system 7 1/2 ton heat pump. The icm control is set for n/c and 24 volt terminals are good. When I bring on the a/c- heat pump terminal on icm has 24 volts. When I bring on heat-no 24 volts at h/p terminal but 10 or so minutes in to the check I hear a click and the h/p terminals are energized while heat is running and I can see the pressure's trying to reverse. This unit has other problems with the reversing valve but that's another issue.