What is your question?
My 2012 Grand Cherokee has the manual dual zone HVAC system. I have two issues at this time. 1. The fan when set of full, will erratically speed up and slow down. 2. The passenger side is on full heat. I took the vehicle in for diagnosis. They told me that the fan resistor and the blend door actuator need replaced(identified by computer codes?). Their quote to do so, seemed very high to me. I changed the fan resistor. That did not fix the fan speed issue. One odd thing that happened is that the blend actuator started making a loud popping sound after we got it back from the shop (gears slipping?). I took the actuator off and adjusted the temp dial to see how it functioned. It ran then stopped and then would run again. Not sure if this is normal? Both gears have no damage. I opened the actuator up and all gears were also fine. I ran the car, set the temp control to full heat, manually set the blend door to full heat and reinstalled the actuator. Still does not work. Is HVAC control bad?
What makes this problem better or worse?
nothing
How long has your 2012 Jeep Grand Cherokee had this problem?
a few weeks
Thanks Dave. I checked the blend door movement and it moved freely by hand. I used a mirror to see inside the plenum (as good as I could) and did not see anything of concern. I will try replacing the actuator. I will check the voltage to the fan motor. Thanks again, Mike