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Air flow control- Need Help!! 700

My trusty 760T wagon has suddenly quit blowing air through the various orifices. Fan motor blows, heater and A/C works etc. but the selector switch does not allow me to change from vent to heater to defrost etc. It appears to be stuck between floor and defrost but is not fully blowing air. Where do I start? I have the dash somewhat apart and have found the air flap actuator but I'm not sure how to determine if this is the problem.








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Air flow control- Need Help!! 700

its a vaccum motor that moves the damper. I would check that the vaccum system works. after that its the selector switch. faq should give more info on vacuum system
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CDN 1988 745GLE 330k km B230F LH 2.2 EZ-117K AW70L Bendix/ATE no ABS







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