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Old 09-08-2005, 05:08 PM   #1
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Default Problems with air coming out of the vents

I've been having this problem on my '91 Olds 88 with electronic climate control. Even if the blower motor is set to the highest speed, barely any air comes out of the vents. It doesn't matter what mode the system is in.

Anyone seen this before?
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Old 09-08-2005, 05:24 PM   #2
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Yep. A blocked evap core can limit air flow. See pics below for descriptions

Pine needles in a 97. Not enough ro block air flow but this is how it starts.
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Mold and crud in a 90. Alone, this will not limit air flow much but can produce a musty or fowl smell coming from the vents.
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Rodent nest. This along with the crud can limit air flow.
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You can vacuum out most of the lose debris by removing the Blower Control Module and using a vacuum with a long attachment with a small diameter. The mold and caked on crap can be removed with a foaming spray. I beleive there is more information in the Techinfo link at the top of the page
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Old 09-08-2005, 05:32 PM   #3
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Thanks. I'll have to look into that.
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Old 09-19-2005, 07:22 PM   #4
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is their any pics of remove process?
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Old 09-19-2005, 07:50 PM   #5
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don't forget that if you cannot hear the fan blowing (you should be able to hear it when it is on "high") then you probably need a new blower motor. If you hear the fan blowing then you have another problem.
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Old 09-19-2005, 09:54 PM   #6
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id would chack blower motor resistor and the duct thats lets the air in the car.

mine fan makes a ticking sound and doesnt blow very hard and i took out my blower motor resistor and looks inside and their is only a few pine needles not enought to block air. any ideas? this make help him also.
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Old 09-20-2005, 11:33 AM   #7
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I can definitely hear my fan going full speed. When I have some time, I'm going to have to check things out inside the ductwork.
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