My air conditioner has started blowing warm air at idle when the recirculate option is on. It's fine at speed or without the recirculate on. Going through the car wash, I can smell the soap even with it on recirculate, and the air is barely cool. I've checked the cabin air filter as well and it looks fine. I suspect it's the recirculate motor or door but I don't know how to check. Unfortunately, my 3/36k warranty ended in march. I'm not sure if this is covered by any other warranty. Anyone have any other ideas to try?