climate control mix door - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 04-30-2006, 06:02 PM   #1
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Default climate control mix door

OK my climate control started flashing the other day, it seems i have the ominous mixer door problem that seems to be pretty previlent. my question is for those of you that have had it what did you do to fix it?
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Old 04-30-2006, 10:16 PM   #2
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Replace the airmix actuator by ripping the entire dash out, or apply my redneck fix I used on the 95 until I can get to it.

Do a search on 'airmix redneck fix'. You'll find it.
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Old 04-30-2006, 10:21 PM   #3
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how do you know what the problem is? I thought only the dealer could pull the climate codes.
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Old 05-02-2006, 04:20 PM   #4
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Ding, ding, ding, ding. You DON'T have to pull the entire dash to get to that wretched air mix actuator. It'* not the most pleasant of tasks, but you can get to it by removing the heater core cover. I know because I just did it a few weeks ago and I think it required a much smaller bag of cuss words than pulling the dash would.

If your ECC display is flashing, chances are real good it'* the air mix actuator. I read all the codes out of my '93 and it said the HVAC Programmer was toast. It was wrong, but I did get to upgrade my '93 ECC to a later model. But make sure that'* what it is, 'cause changing it probably won't be a lot of fun.

I have been working on step-by-step procedures for doing this (complete with pictures, I might add), but I've been so busy lately I haven't had time to finish it. Maybe I can get to it this week. The redneck fix is a good temporary solution until you can find the time to replace the actuator. I'd block out about 4 hours or so to do it.
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Old 05-03-2006, 07:31 PM   #5
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If you're interested, here'* the typical failure mode for the Air Mix Actuator - the big plastic gear splits and slips on the serrated shaft that moves the air mix door.


Name:  Open_air_mix.jpg
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It'* hard to see in this photo, but mine was split through more than 75% of the gear. This caused all sorts of whacky problems with my ECC.
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Old 05-03-2006, 08:43 PM   #6
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SSE Motorhead- I second the motion for a tech write-up on the air mix door. Mine'* been blowing lavalike air on my passengers for a while. It seems like this is becoming a very common problem. Anyone price a new part at the dealer? I'm almost afraid to bother with one at the junkyard...
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Old 05-06-2006, 12:54 PM   #7
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ditto i thought i had one lying around but i can't find it for the life of me. any one have a prt number and a price from the dealer. Or do the park aves and such use the same one? if so i'll grab a bunch from a local yard with a ton of buicks and olds h bodys.
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Old 05-07-2006, 12:05 AM   #8
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I got one from Advanced for about 36 bucks.:P
http://www.partsamerica.com/Advance Auto Parts
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Old 05-09-2006, 06:56 PM   #9
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I got off my corpulent arse and drafted up procedures for changing the air mix actuator. It'* going through a review right now to make sure I'm not completely insane. I'll give it another week or so, incorporate the changes, then post a link.

Now that I've changed that silly thing, I'm not afraid to do it again if I have to. It'* not quite as bad as it appears, but it'* not as simple as changing the air filter either. I did a few things that make the project a little more palatable. It'* all in the instructions which I'll make available in a few days.
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