I have a 2012 SE Manual that has just started with this problem. The A/C will run for 30-45 seconds cold as can be and then blows ambient (hot for the most part) air for 1-2 minutes before going back to cold. It cycles like this the whole time. I have it set to MAX A/C with the fan on 4 but it does the same with it not on MAX A/C and lower fan speeds. It doesn't matter if I'm sitting idle, cruise control at 60, or braking. Any ideas what would cause this?