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Old 09-26-2012, 03:19 AM   #1
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If you have air flow at dash but none for floor or windshield; check the vacuum lines. The damper mechanism is controlled through vacuum and a loose or broken line will cause the system to fail. If you have no air flow at all then check the fuse for the dash air conditioner and for power to motor. If you have power feeding motor but it does not tun then the motor is bad. Good luck and keep us posted.

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Old 09-26-2012, 04:03 AM   #2
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If the vacuum pump is not running and the blower is working OK, the dash air defaults to windshield defrost mode.

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Old 09-26-2012, 06:46 AM   #3
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The mfg. for most of the MH a/c parts is at www.scsfrigette.com The site also has schematics to include vacuum lines.
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