Anyone know a good jeep mechanics in Central PA?

Blend Door Actuators not working properly. The doors open and close to blend hot or cold air.

https://www.google.com/search?q=2007+jeep+grand+cherokee+blend+door+actuator+location

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I had the same problem; it is most likely the Blend Door Actuator...I had that replaced and the heat is working great on the driver side as well as the passenger side. The part was roughly $35. I know someone who is a mechanic so he replaced it for me. I'm sure you can find out how to do-it-yourself online if you are inclined to do so. Good-luck!

There are two blend doors with actuators in models with separate controls for driver and passenger in the HVAC unit. Apparently the driver's blend door is broken/jammed, or the actuator is not working. You'd need to check a service manual to determine how hard it is to get to and repair the driver's blend door.

Do you have dual zone control on the heat a/c control? It's been my experience that is the first thing to go. The blend door is more of a problem between blends, Like bi-level (defrost and floor etc..)

The passenger blend door is broken on its shaft into the air cooling assembly.
The disgnostic is very easy, the part itself is very cheap. The bad new is that the dash has to be removed to reach the HCAV assembly where the blending doors are mounted. 15 hours labour time to replace it by an experienced technician. There is a kind of bypass solution developped and 'marketted' by a company. I have not install this fix by myself so far. Up to you to check if it could be interesting for you.

www.heatertreater.net

Hope it will help
Dan

Cold on drivers side and heat on passengers side, actuators working properly and blend doors are moving. Heatertreater is for piece of plastic on actuator motor. I moved blend door by hand after disconnecting actuator and works fine, both sides freezing when moved in opposite direction.

need to replace recirculation and blend doors, for this need to take whole HVAC housing assy. out and take it apart to replace them, this means removing complete dash assy. possible 6 to 8 hours

hi
there is no recall from jeep (there should be) your blend doors are damaged or broken. jeep will quote you around £800 to fix. log on to heatertreater.net they have a diy quick fix that will last the life of jeep. you can install the new blend doors that are metel (not stupid plastic ones jeep use) in around half an hour, this really does work as i have installed a few of these kits with no problems.
hope this helps

there should be a small valve attached to a hose coming from the engine into the firewall this valve directs the hot engine coolant into the heater radiator in the heater box it probably is closed open it and, you should have heat then: it should be easy to find the reason it was closed

Blend door for passenger side or blend door motor has failed. Very big job to remove dash and work on it. Except the door motor is accessable from the glove box.
Rudy