Thread: blower motor won't shut off
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Old 10-17-2004, 05:02 PM
stevebfl stevebfl is offline
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Join Date: Mar 2000
Location: Gainesville FL
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It would be real appropriate to know what car we are talking about. Since I know an easy answer on the 79 300SD I'll tell you that one.

Someone has bypassed the blower vacuum switch. The sure way to tell is to pull both lines off the bottom of the servo letting them vent to air. With no vacuum the blower should shut off. This common problem is so tempting to just bypass the vac switch. Unfortunately this causes the blower to work in the "0" position.
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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician
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