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I need to use my 87 240dl while I get my van fixed.Today I noticed something strange.While trying to turn up the heat,the "cages" inside where the fan is started to rattle.The motor was replaced last year.The strange part is when I press the button to direct the air flow to the floor, the fan works just fine in all speeds no noise.But if I leave the button out so that the air comes out the upper vents,the cages rattle.Push in,quite.Let it out,noise.What gives?Any ideas?Waiting for my radio from Crutchfield has me hearing every little thump and squeek.
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