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Re: A/C unit in 2007 Dodge Durango
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.
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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.
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.
could be the front door for the front air needs to be propped open so that is blows cold, could also be the a/c compressor or a clog somewhere up front in the vents... it could be numerous things, but i would say try propping the door open, if that doesn't work try replacing the compressor... haynes makes the repair manuals for the truck, goto auto zone, pep boys, etc. and pick up the book they have step by step instructions on how to fix the most common problems and all the different systems of the durango... the book will be very helpful, cause if you do your own work you can find everything easily..... hope this helps you...
you cant adjust it ,this requires the dealers computer to re set it,or a phyiscal control has packed up like a vacumn pipe has split where it pushes onto the valve that controls the flap in the heater unit.
you are bodging it and as you dont know anything about the A/C system then leave well alone and get it done with a machine.the whole system needs to be evacuated oil drain needs to be measured then refilled with the correct grade of oil and then regassed with the correct WEIGHT of gas and possibly a leak sealer added using special equipment.If it still doesnt work properly then it needs draining again and the venturi valve removing and checking out on the front unit.This is a specialised job for highly skilled operatives with the right equipment
The rear vent system has a separate heater core/blower system. heater core could be plugged up or the coolant lines going to rear heater core are plugged. could also be low coolant/faulty water pump not producing enough pressure, or air in the cooling system which will need to be bled if so.