Jeep Grand Cherokee Heater problem

My 2011 Jeep only blows hot air on the drivers side vents. When I try to lower the temperature the scale on the dash goes from high to Low, but the air temp stays hot. The year before this also happened on the right side. At that time I noticed bits of black broken plastic on the passengers front floor. Turns out the drive gear on the blend door actuator had worn out. In less than 2 hours I replaced it and it was back to normal. However the drivers side is a LOT more difficult because of the cramped location. I was not so lucky on this side as the blend door was stuck in the closed position. The driven gear on the door would not move freely and the door was jammed closed. Being VERY careful I used a flat blade screwdriver as a lever against one of the plastic teeth on the door shaft teeth and preyed it open. It now moves freely. I only drive it in the winter and when I shut the Jeep off the temp control is always left in the high position. This probably didn't help, so I am from now on only turn the heat up to about 28 instead of 30. That way the blend door may not get stuck so easy. If this helps anyone please subscribe THANKS

[@ultimatemadmaxcar]

Cameraman did an aweesum job !!

[@davidb8466]

And the camera work was 7:35 thanks for the spot on but I cannot find schematic of where all the parts exploded view of the vents and parts are shown ?

[@YOUZTUBE2000]

I’m sorry, off topic: Is that a picture behind you of a Plymouth Barracuda? Sure looks like one, was wondering the year?

[@davidandsuzy2516]

Yes it is the spitting image of a 1973 Cuda 340 that I used to own as well as a 1973 Dark Green 340 Cuda that we used to own Very sorry I sold them both

[@YOUZTUBE2000]

@@davidandsuzy2516 I had a friend that also owned, and soon sold, his ‘cuda. I remember that he really regretted selling that work of art!

[@CurryHitsman]

What? Does the door do?How do I get inside the component to find some broken pieces that I have?Do you have to tear the - off completely?How do I get to that?I heard it fall in the bautumn

[@davidandsuzy2516]

the gear is plastic, when the teeth break they fall to the floor of your jeep

[@guillermo3804]

I have the same problem in my Jeep 2014 my mecanic ask for 1200 😢

[@davidandsuzy2516]

if it is the same as mine, that is too much money

[@enjoylife7030]

I am going to tackle this job soon on a 2015 GC. Just ordered the parts from Dorman, their website says that the parts now come with an alignment tool? Did you use Dorman parts or know what alignment tool they are referring to?

[@davidandsuzy2516]

I used a Dorman part BUT I did not get an alignment tool with it. There is only 1 way it will work properly so that you can get full rotation

[@enjoylife7030]

@@davidandsuzy2516 I ordered the gear and a new actuator. This alignment tool came with the new actuator. Its basically a small plastic spindle oriented exactly like the one coming out of the actuator and they tell you to stick it in the housing and rotate it so it aligns with the position of the new actuator you are installing. I am taking it apart today finally, so I'll see if it is of any help.

[@enjoylife7030]

@@davidandsuzy2516 well I did the job today. Mine was stuck just like yours. It took me forever but I finally got it unstuck and to the point where it moved freely. I installed a new blend door actuator and a new gear. It went on very easy. Putting everything back together was the frustrating part. Anyway, tested it out afterwards and it’s not working. Some say they need to be calibrated at the dealer or try disconnecting the battery to reset the system. I’ll try the battery option in the morning and go from there. Did yours work right away without any other work needed?

[@enjoylife7030]

@@davidandsuzy2516 So after I made the repair and was able to "free up" my blend door by hand which was stuck, I put everything back together. Mine is a 2015 and the actuator did need to be "calibrated" with a diagnostic handheld tablet per the manufacturer. I took it to a shop to have the calibration done and they said that the computer could not get the new actuator to calibrate with the computer system for the HVAC. At this point I assumed that the whole assembly that houses the blend doors was damaged beyond repair even though I had gotten it to move by hand. These doors do have rubber and foam sealing around them and if they rotate too far they can not only become stuck but also get jammed so bad that even after you free them up by hand they still don't function as they should. Today I got back to the issue because ours blows heat constantly and now that summer is nearly here it needed to be replaced. The dealer is pulling out the dash and removing the entire blend door system and replacing it with a new one which while expensive is a necessary repair for the vehicle to have proper A/C in the summer. These dual zone climate systems are great options and luxuries to have but they are quite complicated. If I tried to do this bigger job myself it would take me many days so I threw in the towel and have paid the shop to do this more complicated repair to the HVAC system. Your video was very helpful to me in replacing the actuator but I knew there was a possibility it would be a bigger issue. At least I got a proper education of what may have been wrong with the system and I don't feel like I am having an unnecessary repair done. Thanks again.

[@davidandsuzy2516]

@@enjoylife7030 I am glad that you watched my Video and got something out of it. Sorry that you have to take it to the Dealer now. To me there are only 2 gears, the one mounted to the door, and the one that drives it from the actuator .There is only one way that they will go on correctly . When you assemble them so that the index is lined up then no need to calibrate.

[@davidb8466]

My door , on the right leg of the passenger side door just blocks the blower , sitting way down . The gear supposed to move a door ? It looks as if there’s something that held something but it’s a shaft that is missing ? 2008 jgc with barely any air flow hot or cold !

[@davidb8466]

Actuator and gears move freely and teeth intact it just doesn’t move a flapper when turning because the flapper fell way down and not retained in any way to the driven gear , did I lose a shaft from the top gear ?

[@davidandsuzy2516]

@@davidb8466 WITH the electric motor off, can you move the remaining gear that is attached to the flapper ? It should move VERY freely back and forth

[@davidb8466]

@@davidandsuzy2516 I guess if in some way am able to remove the blower motor down which gets me to where the door seems to have fallen but I need to expose the bottom and blower motor . If that’s the way in ?

[@davidandsuzy2516]

so there is a gear on the actuator, and it moves the gear on the door flapper , IS IT STILL THERE ?

[@davidb8466]

@@davidandsuzy2516 gears yes but the flapper is not hanging off the top gear , thanks , continue tomorrow weather permitting, I’ll keep your channel updated, thank you