I have a 2005 dorango 5.7 Hemi engine, two days ago the rare A/Cis getting hot air and the front is working fine. both control units the front and the back give the same results only hot air and I am suspecting that it is getting air from outside. checking the pressure level was 20 PSi and we filled the ferion to 40 PSi . but still the same .
Country: Saudi ArabiaMake: DodgeModel: dorangoYear: 2005Engine: 5.7 L HEMI
Tried to check the A?C pressure gas level it was 20 PSI and we filled it till it is 40 PSI.
Checked the front control and the rear control .
All air temperature is outside temp.
water level of the radiator is normal
Attachments are only available to registered users.
The rear A/C has a blend door that controls whether heat comes through or Cold. I suspect that that door is either warped or broken and stuck somewhere in the middle. To diagnose the concern, I recommend taking it somewhere that has access to a Factory scanner that can communicate with ALL onboard computers, with the scanner you can run the HVAC door calibraion procedure, what this does is run all the doors to their travel limits and sets the "Default" door stops. If any doors are warped or broken it will fail the test and a result will be displayed as to what door has failed. At that time the door will need to be replaced and run the calibration again until it passes.
If you want to just check it manually, you would need to access the rear HVAC unit and disassemble it in order to check and replace any broken doors.
There is one "Side Effect" that may have happened by adding refrigerant to 40 psi, it may affect the overall operation of the system if you added too much. So if the front a/c is not working well, you may need to have the a/c evacuated and recharged with the "Proper" amount of refrigerant by weight, that's the best way to make absolutely sure that there is the correct amount of R134 in the system....
Removal of Rear HVAC unit - Click here to view
If you would like any additional information or have more questions please don’t hesitate to ask!
Please remember to only rate my answer when you are 100% satisfied. If you feel the need to click either "Bad Service" or "Poor Service", please STOP and reply to me via the REPLY TO EXPERT button with the issue or question you have. I will be happy to continue helping and will do everything I can to provide you with the service you seek.
Thank you and thanks for using JustAnswer!