The sleep button keeps coming on; I set a/c at 65; it moves up to 73-75 after a few hours. I have lung disease and need a cool room to sleep in. Can you tell me how I can correct this problem.? My manual got ruined in a flood in 2009. I cannot get the buttons to work when a/c does this. Is the processor failing? Can I replace the digital panel? Thanks so much. Jae Welch Holladay, Tn