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    Amy obetz ohio's Avatar
    Amy obetz ohio Posts: 1, Reputation: 1
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    #1

    Jun 28, 2012, 01:33 PM
    Thermostat above setting
    Our thermostat is at 70 degrees... it's 99 outside and the room temp is 73... the air hasn't shut off all day. Is this normal?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jun 28, 2012, 03:46 PM
    Quote Originally Posted by Amy obetz ohio View Post
    Our thermostat is at 70 degrees...it's 99 outside and the room temp is 73...the air hasn't shut off all day. Is this normal?
    Yes on extremely hot days your system is running at max capacity. You have a 26 degree TD (total differential between the outside temp and indoor temp). Your system is running just fine.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #3

    Jun 28, 2012, 05:14 PM
    26 degree differential is fine. How about attic insulation? What is the R value. Good windows? I bet the AC works fine at night!
    Chevyman84's Avatar
    Chevyman84 Posts: 28, Reputation: 2
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    #4

    Jun 28, 2012, 05:32 PM
    When significantly hot or cold weather strikes the setup is prone to show minimal changes. In your case it's not harmful or abnormal. This will probably keep happening if it's that hot out, so don't alarm yourself.
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