Our 2000 durango is blowing hot air from the front vents and cold air from
the rear overhead ac vents when the truck's air conditioning system is
turned on. The compressor clutch engages. the metal tubes/lines under the
hood are both 'hot' to the touch. what could be the problem? plugged lines
into the front condensor? non functioning or stuck vent actuator door or
motor? any suggestions would be appreciated!
there is no heater valve on a durango. I looked at my 99 durango just to
verify that, and as i recalled (and suspected) there is none. I would say
its probably a door problem, vac motor problem or vac problem. make sure
the door moves and there are no vac leaks on the engine.
ok I'll check the blend door... where is it located? I'm guessing it is on
the passenger side, below or behind the glove box... How do I check it?
I looked down by the passenger front door jam and under the glove box and
saw one small vaccuum line connection.. it was in place and not leaking air.
the blend door is on the heater/ac box under the dash (the black box
close to the carpet) you will see a arm on the box that should move when
you select hot or cold. there are a couple of these on there one moves
the air from the dash to the floor to the windshield. the other is the
blend door make sure they both move with the controls.
Does the box open, so the doors are visible?
Someone else mentioned that a low freon charge could cause one of the two
units to blow warm, and the other cold. does this make sense? Seems like
if the charge is low, it would make both not work well.
If the charge was low i'd suspect both systems would perform equally
there are arms that are visible you will see a rod connected to them on
the outside of the box. the box does open but this requires removing the
dash, and recovering the refrigerant from the a/c system to remove the
box before it can be opened. I'll post a picture of one tomorrow.
Thankyou! I just looked under the glove box and found one vaccuum line, and
the box itself, but didn't see any rods or anything that looked like flapper
valves. I look forward to seeing the picture.
alright jo i believe i found the doors you are looking for now they are
no fun to get to. these links are photographed from the driver's floor
board and looking up over the transmission tunnel. The top one (black on
my truck) appears to be the blend door and our suspect on your vehicle
(my assumption) i'd check the vacuum hoses ect for that door motor make
sure they are on and all. in the picture of the black door motor you will
also see a large vacuum connector you may also want to check and make
sure none of those hoses are chaffed and the connector is seated firmly.
the silver motor in the other picture appears to run the direction
control. its right above the accelerator on the driver's side of the
hump. for your information the motor you did find on the passenger side
was the recirc door motor for the inside/outside air selection (max a/c
the is the panel/floor door it would appear and is a better picture of
what a vac motor for the a/c doors would look like.
this is the blend door motor it would appear its way up there and i was
only able to get a hand on mine then cycle the controls and feel for it
i had hopped to get you a better picture of the actuators but that was
the best i could do for ya.
I went out and looked for the items you mentioned and had photos of. I
found the driver side and passenger side vacuum tubes. It was apparent that
the two visible ones, (max ac and floor) both function fine... in that they
shift and blow air from the correct vents... whether or not the max ac vent
door is moving properly or too much I'm not sure.
I took some more photos and added some comments, that may be interesting to
look at. I'm still stumped as to how to find the other vent door actuators
/ vacuum lines and also why the ac tubing in the engine compartment is so
Check out the file and images at this link..
might be time to beak down and take it to the shop. the picture of your
cluster of vac lines is in the area of the blend door motor like i said
its up in there. you can lay your hand on the motor and "feel" for when
it moves. but it would be difficult at best to get to. as far what's hot
and what's not its hard to say without a set of guages.
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