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Central AC won’t shut off at set temp

Mayur Patel
3 years ago
last modified: 3 years ago

I have 3 ton ac unit with model no 4A7A3036H1000NA. I live in Chicago currently out side temp is in mid 80s. I have set my t-stat at 73. My problem is AC will not shut off even when Temp is reached 73 at t stat. If I manually set temp to 74 once it’s at 73 then the unit turns off. Also if I toggle on and off from tstat it works fine. But once it reaches set point then it will run more than 30 min sometimes even hours and then eventually shuts off. What could be the reason here bad Tstat?

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