On Sun, 14 Aug 2016 16:14:26 -0700 (PDT), "Ron D."
wrote:



One reason that would happen is if the AC is set to take in outside air. To get the coldest AC, you want to use recirculate. Also depending on humidity don;t expect a change of more that 15-20 degrees F of the intake and discharged air.

I was using recirculate.

If outside air is used and say the temp is 90 outside, you only get say 75 deg degree air no matter what.

Why would this affect what I said? The air would be 75 on low speed,
but on higher speeds it would blow by the evaporator so fast it
wouldn't cool as much.




If you were using recirculate, eventually, the cabin temp would be 70F and then further cooling it would lower it to say 65 and even further yet and you will have to add a bit of heat.

One thing that's useful is to use the AC and heat at the same time when it's raining and cold. The AC will de-humidify and the heater will heat making the air actually feel warmer.

AC On and pointed to the front window will defog while Heat pointed at the window will defrost.