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Registered
Join Date: Mar 2005
Location: Northern CA
Posts: 4,703
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Chevy has a feature to reset the HVAC blend doors/etc.
Probably many of you/us have Chevy vehicles.
Many have automatic HVAC controls with a number of blend-doors/etc. These door motors can lose their home position and start to make noise e.g. a clicking sound. I had a couple of these door motors making noise and was prepared to dig in and replace the noisy ones. I ran into some YouTube videos and websites that explain a resetting procedure. I completed the procedure and we'll see how it goes - hopefully this helps someone to avoid a trip to the shop or dealer. Here's an example of what's out there. https://sparkys-answers.com/2011/08/hvac-actuator-recalibration-procedure.html
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Sold: 1989 3.2 coupe, 112k miles |
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02-19-2024, 07:32 AM
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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 37,685
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I have that symptom on an '06 Silverado. I'll try it.
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02-19-2024, 07:50 AM
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Registered
Join Date: Mar 2005
Location: Northern CA
Posts: 4,703
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Quote:
I tried my HVAC this morning and didn't hear clicking - so far so good.
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Sold: 1989 3.2 coupe, 112k miles |
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02-19-2024, 11:26 AM
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Get off my lawn!
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Amazing that modern cars have to have the blend doors reset. I guess anything that is computer controlled needs the occasional Crt-alt-delete to reset it.
My 86 El Camino has a blend door that pulls shut for the AC to blow out the dash, or to defrost. It is just a vacuum control. After 38 years it still works fine. It does get regular use as I never drive along with the windows down, either heat or AC is on and working.
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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02-20-2024, 06:22 AM
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Registered
Join Date: Oct 2003
Location: Mount Pleasant, South Carolina
Posts: 14,156
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That might’ve helped with our 2005 Tahoe? There were times, where it would only blow hot air. Not fun in the scorching summertime. Once it started the AC, we didn’t touch it. Great truck. Too bad it got stolen and burned up by some lowlifes.
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02-20-2024, 06:57 PM
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Just thinking out loud
Join Date: Nov 2001
Location: Close by
Posts: 6,884
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I remember doing this over 10 years ago. Turn to full hot (both zones if dual), turn key off, pull HVAC fuse, turn key on, wait 30 secs, turn key off, install HVAC fuse, turn key on, let cycle. I may have left out a step.
Really simple. I remember traveling home from our place on the river in 2010 or so, when we ran across some hunters at a restaurant. I over heard two guys talking about running their battery down (one bytching at the other) and now one side of the truck was cold while the other was hot. I interjected into their conversation and fixed their issue in the parking lot. It's common to have this issue occur after a battery replacement, drained battery, etc...
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83 944 91 FJ80 84 Ram Charger (now gone) |
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02-21-2024, 06:02 AM
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Carrera
