Air won't come out of the vents on my dash but the blower works and the resister is brand new

SCARANO

MEMBER
2000 BMW 323
139,000 MILES

I change the final stage unit(resistor), I can hear the blower working, air comes through the floor vents strong, but weak through the defrost and not at all through the dash vents. What could it be?

Sunday, October 23rd, 2011 AT 12:23 AM

7 Replies

DOCHAGERTY

MECHANIC
9,601 POSTS

Was this issue present before you changed the final stage unit?

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Wednesday, October 26th, 2011 AT 5:04 AM

SCARANO

MEMBER
5 POSTS

Yes and since I changed the resistor a have some air pressure but not much through the vents but still not much through the defrost. And I also checked the cabin filter. Its clean

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Wednesday, October 26th, 2011 AT 4:58 PM

DOCHAGERTY

MECHANIC
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Thank you. The issue could be due to several things. How shall we proceed?

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Wednesday, October 26th, 2011 AT 6:52 PM

SCARANO

MEMBER
5 POSTS

Well I'm a novice mechanic, but I'm pretty good at thinking my way through tasks so any direction would be greatly appreciated. Maybe what to check next or the next 2 or three things. Thankyou for the replies this is great!

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Wednesday, October 26th, 2011 AT 7:03 PM

DOCHAGERTY

MECHANIC
9,601 POSTS

The next step will involve the scanning of the IHKA system to see if there are currently present faults. Seek out someone locally with proprietary BMW scanning tools.