Vents

Asked by Apr 29, 2016 at 04:56 PM about the 2003 Chevrolet TrailBlazer LTZ 4WD

Question type: Maintenance & Repair

I have a 2003 Chevy trailblazer loaded. My battery
recently died so I bought a new one. But once I
replaced it, my car ran fine. But my heat, and a/c
blows, but it's a very little blow. Why doesn't my
vents blow hard like they used to before my battery
died?

1 Answer

10,645

Simple fix. You can pull HVAC B fuse #36 in the rear fuse block (under the rear seat - driver's side) for 2 minutes. Then put it back in with the ignition off. Then turn the key to the RUN position, but don't start the engine. Don't touch the HVAC controls for 2 minutes, and you should hear the actuators and blower motor going through all the modes and speeds. Then its calibrated. Regards

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