2004 dodge durango a/c front hot on cold rear cold. some times you can switch temp up and down to get front cold

Replace the driver side master control switch assembly.

My Durango did the same and it was a high pressure switch bad. If you stand at the front of vehicle it is located on the left side next to the radiator support by the radiator. There is a rubber flap you may have to lift to see it. Switch was a dealer item $ 40.00 I have not had no more problem out of it.
Mine would cycle on and about the time it would get cold the compressor would shut down, it may start a little later or it may be the next day before it would get cold again and then would shut down.

The rear A/C system in the Durango has its own AC and heater core like the front system does. There is a plastic flapper valve back there that either directs the air to one or the other depending on what you have selected up front.

While the part is not too expensive, the labor to get there requires removal of the interior panel on that side which is not fun. It can be done though.

Try www.durangoclub.com for more info.

Don

2003 durango, front fan switch only runs on high, rear fan switch runs fine in all settings

This is from the manual, please rate my help jhere, thanks.
2004 Dodge Durango Car Audio Wiring Diagram
Car Radio Battery Constant 12v+ Wire: Red/Blue
Car Radio Accessory Switched 12v+ Wire: Red/White
Car Radio Ground Wire: Black and Black/Light Green
Car Radio Illumination Wire: Black/Yellow
Car Stereo Dimmer Wire: Orange
Car Stereo Antenna Trigger Wire: N/A
Car Stereo Amp Trigger Wire: N/A
Car Stereo Amplifier Location: N/A
Car Audio Front Speakers Size: N/A
Car Audio Front Speakers Location: N/A
Left Front Speaker Positive Wire (+): Dark Green
Left Front Speaker Negative Wire (-): Brown/Red
Right Front Speaker Positive Wire (+): Brown/Yellow
Right Front Speaker Negative Wire (-): Brown/Light Blue
Car Audio Rear Speakers Size: N/A
Car Audio Rear Speakers Location: N/A
Left Rear Speaker Positive Wire (+): White
Left Rear Speaker Negative Wire (-): Dark Blue/Red
Right Rear Speaker Positive Wire (+): Brown/White
Right Rear Speaker Negative Wire (-): Brown/Orange

Vent door cable or actuator broken or malfunctioning.

ok, missed the part about the rear ac working, the part that causes this is called the air temperature control blend door actuator motor, it is an electric motor driven gear drive that moves the plastic door inside the air ducking to mix or shut off the hot or cold air from the ac evaporator core or the heater core, you will need to replace it.

Yep,I'd agree. The difference in coldness is unrelated to the compressor issue. That a bad vent motor or something like that on the heater box in front. Change the "h" valve or otherwise known as the "expansion" valve too.

I have the same problem with my 2002 Durango. After accessing the rear HVAC unit you will find that there is a rear electronic actuator that operates a plastic door inside the duct system. The door switches the rear system between heat and cold. I had two broken items, the white actuator connector has a tab that broke off and the door inside the duct has broken where this connector fits inside. I am still trying to find the parts on line. I do not know what the part numbers are for these two items. Hope that helps, it seems to be a typical problem with the older durango's.

try removing themostat and see if temp improves make sure themostat is fitted the wright way not upside down