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#1
02-08-2008, 04:44 PM
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2003 Replaced battery, AC/Heat noisy
I replaced my battery in my 2003 Envoy XL. It sounds like the heat/ac dampers are "clicking" loudly for 30 seconds when I start my vehicle, the noise stops but I have lost air ouput at the dash discharges. Any ideas?
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#2
02-11-2008, 09:21 PM
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Re: 2003 Replaced battery, AC/Heat noisy
Without getting too technical, the HVAC actuators lost their position when power was interrupted, it's what's called HUNTING.
you need to recalibrate the actuators, here's how... ignition off remove the HVAC B fuse for 10seconds. reinstall fuse, start engine wait 40 seconds for the HVAC control module to self calibrate.
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