Okay, I've got a weird one here, guys. I got a 2023 Kia K5 two years ago. It now has 52k miles, but at around 20k, the AC started going out. I was going to take it to the dealership to get the warranty to cover it, but shortly after I scheduled it, I got into an accident. It wasn't terrible, but it ripped off the front bumper and slightly dented the hood. Anyway, I couldn't get the warranty to cover it anymore because they said it could be accident-induced damage, even though it was going out before the accident. When it was going out, it would blow cold, then stop and blow hot. Then I learned that running over rumble strips would actually start to make it blow cold again. That was a year ago. I stopped driving it for a while to get the front fixed, and when I started driving it again, it was winter, so I wasn't worried about the AC. Well, now it's summer, and I took it to a shop to get the AC looked at in mid-March and got it back Friday of last week. They told me it was the Schrader valves leaking and replaced those and recharged the system.
It was working great for a week. Today, it started blowing hot when I cranked it this morning. Just as a joke, I ran over a stretch of rumble strips, and low and behold, it started blowing cold again. With this information, what's your best guess as to what the problem could be?