HOW TO: Replace 2010+ Equinox/Terrain HVAC Mode door actuator - Page 4 - TerrainForum.net: GMC Terrain Forum
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post #31 of 39 (permalink) Old 01-27-2019, 07:03 PM
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Originally Posted by jmcwhorter View Post
Wife's 2011 Equinox makes the thumping noise when you switch between Recirculate and Fresh air mode. If I remove the glove box and crawl up under there, you can see the door try to go past the fully closed position, and then it thumps for a random amount of time before stopping. Sometimes it's 3-4 seconds, other times it's 30 seconds.

This thing looks IMPOSSIBLE to get to without rolling the entire dash forward, unless somebody knows a trick I'm not aware of. I had the top portion of the dash ready to come off (instrument cluster off, radio off, every screw i could find, etc.), but the passenger side just would not budge. Was afraid I'd destroy the airbag if I pulled on it any harder than I was.

What's even more annoying is, if you shut the car off with it still set to Recirculate, about 5 minutes later (key still off) the actuator opens the blend door. So the next time you start the car, it makes the popping noise as it moves back to Recirculate.
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Originally Posted by Colt Hero View Post
Sounds like we have the same problem. My 2011 V6 Nox has been making the loud thumping noise for several months now. Sounds like a Munchkin inside the dash pounding his fist to get out. Waiting for it to fail completely. I *think* my air is still being directed to the proper areas: it goes to the windshield, out the dash, and below the dash correctly, and I *think* the air blending still works, so Iím not sure whatís gonna fail (the directional, or the blending). On my Ď97 Taurus, the cigarette pack-sized blend door motor failed at least twice due to cracked plastic gears that would cause the blend door to continuously fall down into the COLD position. For a while I was just manipulating it manually by season, fixing the position either all the way up, or letting it fall down. This thumping noise reminds me of that same blend door failure. The directional on the Taurus is controlled by a vacuum system, I believe



I have the same issue? Everything works but I can see the door closing and then thumping. Any idea what the fix is?

2010 Terrain SLE 2.4L I4 FWD Onyx Black
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post #32 of 39 (permalink) Old 01-28-2019, 04:05 AM
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Originally Posted by brisket_lover View Post
I have the same issue? Everything works but I can see the door closing and then thumping. Any idea what the fix is?
I think in *my* case it's the "Mode Control Cam" (left side dash), which has a couple of "arms" with gear teeth on them. I think either those gear teeth have stripped on one or both "arms" OR the socket they fit into (female) is stripped. If it's the latter, that's probably worse because the former can be removed fairly easily (I think).

What’s strange is - the thumping sound sounds like it’s coming from the right (passenger) side. There *is* another actuator on that side...

2011 Equinox 1LT (new Jan 2011): Summit White / 3.0 L V6 / FWD / Pioneer Stereo / 18" Wheels / 138.2k miles [05-NOV-2019]

2002 Impala 1LT (new Jun 2002): Summit White / 3.4 L V6 / FWD / Cassette-CD Combo /225.5k miles [05-NOV-2019]

Last edited by Colt Hero; 01-28-2019 at 04:12 AM.
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post #33 of 39 (permalink) Old 04-15-2019, 04:41 PM
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Sos

I am having the exact problem in my 2012 Equinox (air will change from hot to cold, but will only come out of defrost vents) Took it to the shop and they confirmed the actuator was failing and replaced it, but it did not fix the problem. They are claiming they need to remove the full dash to replace a different actuator. Could this be correct My concern was they not calibrate it correctly, but they claim they reset it 5 times and it still won't work.
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post #34 of 39 (permalink) Old 04-16-2019, 08:36 AM
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Originally Posted by lindseydp View Post
I am having the exact problem in my 2012 Equinox (air will change from hot to cold, but will only come out of defrost vents) Took it to the shop and they confirmed the actuator was failing and replaced it, but it did not fix the problem. They are claiming they need to remove the full dash to replace a different actuator. Could this be correct My concern was they not calibrate it correctly, but they claim they reset it 5 times and it still won't work.

I would look for another shop. This one does not sound knowledgeable of this repair.

2018 Equinox LT1 1.5 L 4 cyl, AWD, S/R Cajun Red Tintcoat/Black

2010 Equinox LTZ 2.4 L 4 cyl, FWD, S/R Cardinal Red/Black
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post #35 of 39 (permalink) Old 08-04-2019, 10:57 PM
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Thank you!!!

Please let me add my thanks to you for posting this how to... I purchased a 2015 AWD LTZ Equinox last year to replace a 2004 CRV. I am very pleased with the car. However this spring we noticed that the defrost was not working and air only came from the dash vents. After researching the issue I decided to take a chance and replace the mode door actuator. And your correct - a large sense of humor helps! I didn't have a teenager to help so did the job myself. At 63 I'm not as flexible as I once was but I got the job done. Everything works. I do appreciate the effort to make your post. Thanks much.
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post #36 of 39 (permalink) Old 08-10-2019, 06:45 PM
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Just curious if you had an issue with the ac when it rains before you changed this out?
Mine works fine until it rains then it’s no ac for days just hot air
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post #37 of 39 (permalink) Old 08-25-2019, 06:20 PM
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Thanks and Heads Up for Replacement Part

Thank you for the post and the courage to tackle this on my own. Like an idiot, I ordered the part based on a quick internet search so I would have it when I started the repair. Buyer beware! There are a lot of websites out there that will try and sell you a 5 pin replacement blend door actuator when you search for mode actuator. On my wife's 2013 Chevy Equinox, once I got it out, it is a 6 pin and the wiring harness was shaped differently than the part it plugs into on the actuator. This was my fault though, so I wanted to give others a heads up. I found a six pin on NAPA, part # TEE ADA245.
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post #38 of 39 (permalink) Old 08-29-2019, 01:05 AM
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Followed this awesome guide a few weekends ago.
100 degree heat, 4 hours, and I could be a professional gymnast with my new found flexibility.

My car is a 2012 Equinox.

If you can have the tools to remove the silver plate in front of the actuator, I'd definitely recommend it.
Most of my time was spent trying to get to my hand behind it to take off the actuator.
And like the post above says, make sure you order the correct actuator. I think they differ based on year, and model (equinox, terrain, etc.).
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post #39 of 39 (permalink) Old 09-17-2019, 06:44 PM
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My 2011 Equinox "recirc" button is causing a ticking noise.. but can't find a way to remove that actuator, it is more towards the firewall between the engine/ dash. Any ideas how to replace this recirc/ vent actuator?

I already have the part.
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