SureTrack Community Fix: Where’s The Air?

Real Fixes from Mitchell 1’s SureTrack® expert information resource are documented issues from actual shop repair orders 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 product.

You’re trying to get some heat or air from your HVAC system and no matter what blower setting you select, not much air comes out of the vents. You’d think something is plugged up or blocking the vents. SureTrack community member jecarr had a 2002 Dodge van in their shop that would blow air out of the vents. They posed the question to the community, and with the help of fellow community member ericsautomotive and others, they were able to resolve the issue quickly.

The following Community Fix summarizes the interaction between members of the community that led to the solution.

2002 Dodge Ram Wagon B2500 5.9L

Low airflow from vents, rewired blower motor connector.

Customer complains of very little air flow output from defrost, floor or dash vents.

Diagnostic Steps Performed/Parts Replaced
Checked air flow at various vents and little comes out at any blower setting. Washed out EVAP and heater core box with cleaning foam and water. Checked vacuum source to mode changing ability. The fresh air door seems to be stuck.

Best Answer from Community Member ericsautomotive
Has blower motor ever been replaced? If it has, is it wired correctly (polarity)?

The blower motor had been changed a couple months ago. The wires were spliced and were correct in relation to color, but the terminals in the hardshell connector were reversed! The motor was turning backwards! Thanks again, guys. We just switched the terminals around and it works.

Corrected terminals in blower motor connector, vehicle operates as it should.

SureTrack® adds to the power of ProDemand® 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.

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About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.