Car AC Diagnostic

My Car AC is Blowing Hot Air

The car Ac is blowing hot air suddenly or is blowing hot air slowly over a period of time. When turning the AC switch ON usually, cold air is coming out of the AC vents. But when the AC switch is turned ON instead of cold air, hot air is coming out the vents.

Mildew Smell in Car AC

If ac blows air that has a mildew odor, the problem could be the drain pan of AC's evaporator unit is not draining and causes mildew smell in car AC.