I not familiar with the unit you are referring to, but I've always thought
that a "dual zone" control in a van was one for the front, and one for the
back... If that is the case, both driver and passenger side vents should
blow the same, either both cold, or both hot in this case... Is that the
case, or is it actually cold on one and hot on the other? Also, is the dual
zone, front/back, or driver/passenger?
I have a Caravan that has two temp controls up front; one for driver, one
for front passenger. There is also a separate control for the back
passengers, but I think there is an option for separate controls for the
second, and third rows.
That was one reason we bought the Caravan, instead of GM's Astro. My wife
likes it so hot in the winter, that the fluid in my eyes starts a slow boil.
<g> In the summer, I like it cold, but she likes it almost as cold as I do.
The control for the back is either by a control on the console, (up front),
or a selection that lets the people in the back set it how they like it.
The zone I refer to are passenger/driver. The drivers side is hot
always, and the passenger side can be controled by the slide switch for
cold and hot. I thought the climate control switch could be bad, but
before buying it I hoped to hear from others who may have had the same
problem. It would make sense that the switch could be bad but I was not
sure if there was a seperate vent from the heater box.
There are 2 actuators for the dual zone system. One for the passenger side
and one for the drivers side, if the actuator is bad it could cause that
problem but more then likely the problem is in the control head. The last
time I priced one was about $365.00
With the proper service manual for your vehicle (factory manual) you would
be able to go through a series of tests of the unit to determine what the
problem might be. These units generally have a self-test as well.
Unfortunately, without the service manual, there really is no way to know
what the proper button combination is.
What I find amusing, is that there are Chrysler "techs" in this group, yet
none of them even bother to mention this, or explain how to put it through
the self-test. I know they know, they've got the service manuals at their
finger-tips. Instead, they tell you "possible" problems, and list price
quotes for you. How helpful is that, especially if it is only on a guess...
I know wouldn't want to blow $365 on a guess.
This might be a little more help to you, should you choose the replacement
route. There a guy on eBay (no affiliation) that does Exchanges of
"professionally repaired" units... He currently has an auction up for a
dual-zone heater unit, if you think you could replace it yourself. Most
likely it's not real hard, remove a piece of trim or two, remove a few
screws, unplug a couple electrical connectors, and reverse the order...
Here's his current auction...
Sorry if it wraps and isn't clickable. If it does, just go to eBay and type
the item number (6054885028) into the search box...
Oh, after a bit of searching, I came up with this site:
It explains a little bit about the testing procedures, along with
calibration and what not. It's not complete, but would be a good a start...
When you refer to the control head do you mean the unit that the
climate control slides are on? I have taken the panel apart and
examined the printed circuit board for and burn marks or anything
unusual. I did go to a junk yard and find another one but it was from a
different year Grand Caravan and the connector was the same with the
exception of the guide key so the connector would not go on. I could
always remove the connector from my old unit but there was a change
made for some reason and to do this might compound my problem. I have
had the auto to a mechanic and he suspected the dash control unit or
heater box that is why I am trying this before being at the mercy of a
mechanic that might not be so honest. I really do appreciate the
feedback from everyone.
You can only use the control head that is designed for that vehicle. I
believe there are 3 of them (regular zone/dual zone/ and dual zone with rear
auxiliary) and then you have woodgrain or just black and the one you have I
think has the blue and white connector (not sure) But if you have the black
with rear air you should have Part # 4677917AB
Without having a scan tool to see what the inputs to the actuators are you
are really at the mercy to have someone test it.
If I had to guess, I would say out of all the complaints I have seen for the
problem you are experiencing 99% are related to the control head (the part
with the slides) The other 1% would be related to faulty actuator, wiring or
blend door problems
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