What could have caused a blockage? Surely trash hasn't gotten in there because it's a closed system. The A/C works while going down the road. It's only while sitting still at an idle when this happens. I have noticed in the last few days, the car has been running hot while in stop and go traffic. As long as it's in the wind its fine. It seems like the fan is not coming on. I haven't checked it yet but I'm going to sometime this weekend. Thanks for posting. Please let me know if you have anything else to add.