{"id":6518,"date":"2021-08-10T12:00:36","date_gmt":"2021-08-10T19:00:36","guid":{"rendered":"https:\/\/mitchell11.wpenginepowered.com\/blog\/shopconnection\/suretrack-community-fix-reverse-air\/"},"modified":"2025-01-03T11:19:11","modified_gmt":"2025-01-03T19:19:11","slug":"suretrack-community-fix-reverse-air","status":"publish","type":"shopconnection","link":"https:\/\/mitchell1.com\/shopconnection\/suretrack-community-fix-reverse-air\/","title":{"rendered":"SureTrack Community Fix: Reverse Air"},"content":{"rendered":"

\"\"<\/a>Real Fixes from the SureTrack\u00ae<\/a> expert information resource are documented issues from actual shop repair records and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is available at no additional cost in our ProDemand<\/a> product.<\/p>\n

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It’s always frustrating when you replace a part and the new one doesn’t work as it should. SureTrack community member bmaples<\/strong> had a BMW X3 SUV in the shop where they replaced a bad HVAC blower and now it only had a little bit of air coming out of the vents. They posed the question to the community, and with the help of fellow community member Ericsautomotive<\/strong> and others, they were able to resolve the issue quickly.<\/p>\n

The following Community Fix summarizes the interaction between members of the community that led to the solution.<\/p>\n

Vehicle<\/strong>
\n2004 BMW X3 30i 3.0L<\/p>\n

Title<\/strong>
\nLittle air coming from vents, rewired blower motor.<\/p>\n

Complaint<\/strong>
\nCustomer complains that no air is coming from vents.<\/p>\n

Diagnostic Steps Performed\/Parts Replaced<\/strong>
\nChecked vehicle and confirmed that no air was coming from the vents when heater or air conditioner was on. Found defective blower motor. Replaced blower and now it’s working but very little air coming from the vents. Scanned with the Zeus and get code 20 for AUC stores. It appears none of the modes work except the fresh\/recirc function. Have confirmed the doors for Fresh\/Recirc work visually and can hear the pitch of the air sound change as well when fan speed is changed, Do not hear that when working the modes like Face and Defrost and very little air coming from face vents. The vent shut off knobs work and I can see the doors are open. A\/C compressor engages and Lo aide line sweats and the little bit of air coming out feels cold. I read something in the limited service info BMW provided and it mentions something about and exhaust fume sensor can shut things off but no testing for codes or even a DTC index is provided. Is this code 20 the cause of my problems? Are there any tests available to help me further diagnose this? Any tips our guidance is greatly appreciated.<\/p>\n

Best Answer from Community Member Ericsautomotive<\/strong>
\nMake sure the polarity of the blower motor isn’t backwards. It might be that the new motor is not wired correctly.<\/p>\n

Cause<\/strong>
\nChecked the blower motor wiring and found that the polarity was backward as Ericsautomotive suggested.<\/p>\n

Correction<\/strong>
\nCorrected polarity of blower motor wiring and it now turns the correct direction and air flow is restored to all vents as it should be.<\/p>\n

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SureTrack\u00ae adds to the power of ProDemand\u00ae<\/a> with an exclusive combination of real-world knowledge and powerful diagnostic tools, all wrapped in an interactive community of professional technicians. Designed to help automotive shops increase accuracy and efficiency from diagnosis to completed repair, the industry’s most comprehensive repair information resource is just a few clicks away.<\/p>\n

Want more? Here’s how you can see more Real Fixes in SureTrack:<\/strong><\/p>\n