Spot on! What a stupid design. Inherently, the matrix is more reliable as it doesn't have this issue.Bookworm wrote: ↑Thu Sep 12, 2019 6:14 pmYou aren't missing anything. You've just seen _why_ they break.
This is a constant load motor, running positive or negative. The button just switches the direction. When it hits a stop, it then continues to try to turn, but isn't strong enough to overload the shaft.
The fix for this would have been to either use metal gears, or put in a contact stop switch. Needless to say, NUMMI didn't think the extra cost was worth it, as it wouldn't be THEIR car that had the failure.
Hopefully you didn't throw the old one away. Pop it open, flip the gear, and you now have a spare if/when the replacement breaks a tooth.
Yep. Couldn't agree more. This is what you'll find when opening it up
Remove the glove box, and you'll see it. I JUST did mine yesterday. It's not hard, really. Just two small 5.5mm screws holding it in, and the electrical connector.. 2 hours later, I was finally finished.
I ended up losing that screw, so mine is only held in by the one lower screw. My replacement came from Amazon for like... $10. Not expecting much, but figured if it's going to go bad, might as well make it cheap.Jbenrod wrote: ↑Sun Dec 01, 2019 2:13 pmI still don't know how people are able to get that top screw out. I can reach up and feel it but since there is a cable or duct just to the left of it I can never get a tool or even just the socket in there to get on the screw head.
Regardless, I wanted to report that switching the gear (180) with the worn teeth didn't last but a few months on my Vibe before the other side teeth stripped out as well. Next I purchased a new Dorman actuator unit and it has now already failed with probably less than 12,000 miles (same "ticking" noise now happening again). Therefore I can not recommend the Dorman brand for a replacement.
Welcome to genvibe!gr8n8 wrote: ↑Tue Mar 31, 2020 12:08 pmDoes the blend door have a default position? like spring loaded one position or the other? Arizona heat right up under the top of the dash is going to cook the gears quickly. I'd be willing to let it remain in the fresh air position or figure out a cable install to change it rather than need to change it multiple times.
see tpollauf's picture above showing the inside of the actuator, and you'll notice the biggest white gear is missing two teeth. Pull that one out, put it back in rotated 180 degrees
You were only two or three 5.5mm bolts away from replacing it yourself when you unplugged the electrical connector.philipsoeder wrote: ↑Thu Jul 30, 2020 1:51 pmAfter confirming recirculation/max a/c button wad disengaged so hvac is in fresh air mode, I just removed glovebox, squeezed the electrical connector and pulled it’s power. Also pulled hepa filter, washed it out thoroughly, let it dry and put it back in.
Last time the actuator failed it cost $241 for mechanic to replace and new part broke within 18 months.
Taking away its power was free, and my hepa filter is like new, for free.
Only drawback is my windows won’t fog in winter when the recirculation/max air dash button gets stuck!