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Unread 12-10-2007, 04:02 PM   #1
Parsonsbri
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Heater control problem, help please!

Hi all, new to the forum here.

I own a 2001 Jeep GC and recently sold it to my Dad. It is in really great shape. Of course a month after I sell it to him, there is a problem.

What is happening is that the heat on the passenger side is not working, only "blowing cold" according to pops. On the driver side, no problem. On the passenger side the defrost vent, vents on the dash and the floor all blow cold.

He called a dealer in the small town where he lives and was told that a little plastic piece has a tendency to break and the only repair is to replace the whole control unit...wait for it...for $900, thank you.

Can anyone provide some insight? I would really like to know if anyone has either experienced this or knows a solution.

Thanks,

BP

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Unread 12-10-2007, 04:05 PM   #2
ratmonkey
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blend door issue. very common. there's write-ups around here to help you do it yourself.
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Unread 12-10-2007, 04:07 PM   #3
zaq123
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I assume it's Limited. If so, this is your issue, or should I say your dad's issue

http://www.wjjeeps.com/hvac_sub_assembly.htm
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Unread 12-10-2007, 04:10 PM   #4
JG_Canuck
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Kludge fix: search ebay for "heater treater"
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Unread 12-10-2007, 04:36 PM   #5
Parsonsbri
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Thanks guys!

Is there any way to diagnose which of the two problems that are listed on the link without going in for service?
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Unread 12-10-2007, 06:27 PM   #6
koegg58
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I just had this done at the dealer and had them replace HVAC control box with redesigned unit so it should not happen again. While it's apart you should change out the evaporater and heater cores as well. I know this is expensive but thats the price of owning a Jeep.
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Unread 12-10-2007, 06:37 PM   #7
Briandl
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Quote:
Originally Posted by Parsonsbri
Thanks guys!

Is there any way to diagnose which of the two problems that are listed on the link without going in for service?
Run the test shown here:

http://www.wjjeeps.com/climate.htm

You can then post the codes here and we'll be able to give you more specific information about the problem and solution.

How many miles on the Jeep in question?

If you replace the evaporator core and heater core I've heard you should also replace the expansion valve.
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Unread 12-10-2007, 07:07 PM   #8
alexo1us
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Its your dad..
fix it right..
maybe he will pay for half since he owns it bbw here
the heater treater is great option but not the best
even if you go this route it will cost you ,more if someone else does the work,
new parts are better
good luck
Alex
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Unread 12-11-2007, 07:30 AM   #9
WJChris
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I just replaced my heater core (same amount of work) Only took 10 hours.
Stealership here wanted $1500!!

Get a manual and do it yourself!
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Unread 12-11-2007, 08:46 AM   #10
Wheelin98TJ
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Quote:
Originally Posted by Parsonsbri
Thanks guys!

Is there any way to diagnose which of the two problems that are listed on the link without going in for service?
You would still have to pull the dash, even if its a problem with the blend door actuator, because your problem is with the passenger side.
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Unread 12-12-2007, 02:58 PM   #11
Parsonsbri
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Thanks guys.
The reason I am here is because $900-1500 is not in the budget. We have to do this ourselves if its going to happen. It looks like even the worst case would take a day at most to do it. both of us are fairly handy around a car. On my 98 limited I had the dash out once to do a stereo upgrade. It was scary the first time, but you just have to be patient and follow the instructions.

i am going to have dad run the diag and see what codes come up. I will report back once I get the codes.
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Unread 12-12-2007, 03:24 PM   #12
JG_Canuck
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The parts are not that expensive, and if you can spare the time it's easily a DIY job. There is a full writeup on www.wjjeeps.com and there is some valuable additional info here
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Unread 01-11-2008, 03:35 PM   #13
Parsonsbri
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Its been a while since I have been back, but all is well.

Ran the diag suggested by the dude at "Heater Treater". I was lucky since it was only the blend door and not the motor. Easy fix. Took us about an hour and a half. I could do it again in 30 minutes. Compared to the $1000 plus the dealer wanted, Dad is ecstatic and the heater is working perfectly.

Thanks for the tips gents!
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Unread 01-11-2008, 05:00 PM   #14
daveyboy43
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What test did he tell you to run?
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Unread 01-11-2008, 07:41 PM   #15
zaq123
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Quote:
Originally Posted by daveyboy43
What test did he tell you to run?

here

http://cgi.ebay.com/ebaymotors/Jeep-...spagenameZWDVW
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