2007 Maxima, I just replaced a/c compressor and one of the hose that leaked. I still have this issue. For a moment or two it blows 45 degree and then you feel the humid air and it start blowing 68 to 74 degrees. It seem to alternate between the opposite settings. I'm wondering if I have a bad vent door that lets outside temp mix with a/c or could I have a/c, heater control (push button on the dash) bad? Or could it be something else all together?