Trane Xe80 We Have A Trane Xe80 Heating & Cooling Unit That Blows Warm Air When We Set The Thermostat To 75.?

We have a Trane xe80 heating & cooling unit that blows warm air when we set the thermostat to 75.? - trane xe80

What does this mean? For example, 2 hours today, we present the C / A 75 and still shows 80th Could it be that it takes much longer to cool because it was 85 degrees and humid today, Milwaukee, WI?