When I recently had my AC charged (I have a Sanden 134 compressor) the guy told me I severely needed to add a "pusher" fan to put in front of the condensor. He said the compressor was building up too much pressere and that the pusher fan would help. I currently have a "puller" which is rated at 1300 cfm. Does the pusher sound right? If so, where is the best place to purchase?