1989 98 Weak air flow through vents - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 09-26-2011, 02:37 PM   #1
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Default 1989 98 Weak air flow through vents

Whether I have the air or heat on, it seems like there is a minimal amount of air coming through the vents. The fan works on all speeds...low to high. Any ideas as to why there'* no airflow?
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Old 09-26-2011, 02:50 PM   #2
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i would check to see if you are getting full voltage on high at the blower motor connector. that will narrow down what your problem is. if you are, could be a diverter problem, some buildup in the evap or heater core, motor could be going
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Old 09-26-2011, 08:23 PM   #3
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If it has blend door accuators you may have one or more froze up. You can usually pull them and take the top off and free up the motor. I've had to do it a couple times.
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Old 01-26-2012, 01:25 PM   #4
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How do you pull these out? They seem like they twist on or something?
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