Will guys I finally got a chance to check alittle futher into my alarm T-123.I have to say thanks to all for the advice of checking more and reading the book.This unit does not have a HSS temp sensor but it does have a suction transducer which looking at the display reading 183psi w/actural gage psi of 90 w/unit off.At the beginning of school just to many calls and not enought people to go around.thegoodlistener thanks for helping again and I will go back and check the display setting.Tks----CJ