I have had a longstanding problem with the minimal volume of air coming from the interior air vents even with the fan switch on the highest position. The problem had once been diagnosed as the fan running backwards, and I finally removed it to check (all of four small screws and a couple of electrical connectors!!). The fan motor is running clockwise (as viewed facing down at the removed fan unit)and the fan vanes are moving in the wrong direction to blow air. The squirrel cage can't be flipped over. The motor has MADE IN USA on the outer plate. the center of the squirrel cage has imprinted 3R , a small arrow pointing in the counterclockwise direction, then 303 6834. The connection on the bottom of the unit is positive with one male spade connector. The other connection is a triple spade unit that mounts on the same baseplate which I believe is the ground or negative. Is this unit adaptable by changing the squirrel cage with one with the vanes in the right direction? Or the wiring switched? Or is a new unit necessary?? It runs flawlessly (just not effectively). Any help would be appreciated. Steve #3542