My ac works when its stays on AC but my truck will switch from blowing cold air to hot air when the Heated seat button is turned on. A/c button is also on and set to 70-72.
Once i turn off the heated seat button, the hot air continues. If i turn the air down to LOW, it blows cold. Turn it back up to 70, blows hot again. If i turn the air off completely and let it sit for awhile, it will blow air similar to the temperature that i set.