been having some issues with the a/c on Lo under normal driving and idle it starts blowing warm for few minutes then goes back to normal. video'd it on my phone last time and over a 7-8 min video it went from blowing at 42 climbing to 76 degrees and the battery light came on. After gunning the engine, the temp came back down to normal and light went off.
Tech said it could be the alternator not providing enough power to a/c system and replacing.

Thoughts!?

 

test your alternator, easy to do. if bad replace, if not them maybe you need freon.