from what i recall the recirc button is for closing the fresh air door when outside odours are a problem.when temp wheel is lowered to the detent it should close the door all the way.the pass side airbag should be held in by one big bolt from the bottom but you can pry up the grill in front of the windshield on pass side[watch out for clips] and see the fresh air door.what are the pressures and temps when system running but not cooling enough?
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