The a/c on my 2003 honda accord will all of a sudden stop blowing cold air. I already had the filter changed thinking that was the problem. The mechanic is having a hard time figuring out what is wrong with it because everything checks out good but seems to think it could be a sensor or something. It doesn't stop blowing air it just isn't cold and after awhile it will start to get cold again. Has anyone else had this problem or tell me what might be wrong with it?