i have a 2010 keystone m fridege after pluged in for a week in outside temps of 50-60 deg temp 38-40 deg slider is at the top of fins. i cant imagine what will happen when the outside temp is 90 o...
Also make sure the thermometer you are using is accurate. I once had what I thought was a good thermometer and it turned out to read 10 degrees higher than actual temp.