i have a 2007 acura tl type s automatic with 141,000 miles. i took it to the dealer (regretfully) to have my headlights lowered because my local mechanic didn’t do it correctly. since i’ve gotten it back, the A/C has been acting weird. i’m certain they messed with it so i would come back in and give them more money. when i start my car, it’ll blow cold for a few seconds, then it’ll start blowing hot. after about a minute or two, it blows cold again. i’m too scared to adjust the temperature because i don’t know if it’s gonna stop working or not. it’s never done this before, and it being a glorified honda, nothing major has ever been wrong with it. happy to answer any questions.