I am interested in operating instructions for this item. There is no visible model number. The only number I see is on the right edge of the flip down instruction panel. The number is perpendicular to the other writing and it is 153-2325. The cues across the top are Time Fwd, Set Clock, View Prog, Hold Temp - across the bottom they are Time back, set day, run prgm, adv progm. It was put in my house with a heat pump upon consruction in about 1998