Help!! Dual Zone Airconditioning Failure
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Joined: Sep 2001
Posts: 55
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From: Miami fl
Help!! Dual Zone Airconditioning Failure
This Morning I discovered that my Dual Zone Airconditioning has gone wacky. With the air on, the system blows lukewarm air on the drivers section and cold air on the passengers setion. It doesn't matter where I set the temperature controls, it remains warm on the driver side. Has anyone ever seen this and does anyone know of a simple fix??
Thanks in advance,
Mike
98 Vert Torch Red
Thanks in advance,
Mike
98 Vert Torch Red
Drifting
Joined: May 2000
Posts: 1,917
Likes: 3
From: Southern NH
Re: Help!! Dual Zone Airconditioning Failure (Mickyd747)
Someone just posted the same problem last week. There are 2 vent doors in the ventilation plumbing to control the driver and passenger air separately. The left (driver's) vent door is stuck in the warm position. The electronic actuator motor that controls the door may be toast. One thing you can try is pulling the A/C unit's fuse (or disconnecting the battery temporarily) and reconnect. This causes the A/C head end to go through a start-up routine including calibrating all the actuator motors/doors travel and limits and may reset the problem.
Thread Starter
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Joined: Sep 2001
Posts: 55
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From: Miami fl
Re: Help!! Dual Zone Airconditioning Failure (JC in XTC5)
QUOTE
>One thing you can try is pulling the A/C unit's fuse (or disconnecting the battery temporarily) and reconnect>
That's interesting. The problem developed after I disconnected the battery on Sunday.
Mike
98 Vert Torch Red
>One thing you can try is pulling the A/C unit's fuse (or disconnecting the battery temporarily) and reconnect>
That's interesting. The problem developed after I disconnected the battery on Sunday.
Mike
98 Vert Torch Red
Racer
Joined: Feb 2001
Posts: 433
Likes: 0
From: melbourne beach fl
Re: Help!! Dual Zone Airconditioning Failure (Mickyd747)
I had this same problem once a few months ago. From experience with other cars I recognized the problem as "stuck vent doors". I did the following, which seemed to "unstuck" the doors, and problem has not reoccurred:
Turn up your temperature as hot as it will go. This should open the doors to the max, and you should get hot hair on both sides. Let it run for 20 seconds or so. Then turn the temperature as cold as it will go. Hopefully the doors will close, and you will get cold air out of both sides.
Turn up your temperature as hot as it will go. This should open the doors to the max, and you should get hot hair on both sides. Let it run for 20 seconds or so. Then turn the temperature as cold as it will go. Hopefully the doors will close, and you will get cold air out of both sides.
Instructor
Joined: Jul 2000
Posts: 126
Likes: 0
From: Davidson NC
Re: Help!! Dual Zone Airconditioning Failure (Mickyd747)
Must be a Florida thing. Had it happen twice (always after disconnecting the battery), had the door motor replaced twice. Last time though, we were able to get it unstuck by simply clearing the HVAC code. I also recall some folks on here getting it unstuck by disconnecting/reconnecting the negative battery terminal again (causes door to cycle). If you're still under warranty, you might want to get the motor replaced. :yesnod:
Good luck!
Good luck!
Burning Brakes
Joined: Jan 2002
Posts: 1,147
Likes: 1
From: Geismar LA
Re: Help!! Dual Zone Airconditioning Failure (Mickyd747)
This happened to me twice (02 vert) when the car was new. I reported it to the dealer, but since it wasn't doing it at the time, they couldn't do anything. But the factory called me about some survey and I reported the problem to them and they called me back and said it was "impossible" for this to happen, that it can't be more than a 5 degree difference between sides. Mine was blowing heated air from the driver side and A/C from the passenger side. I had to turn the air completely off and roll down the windows to drive the car. I got where I was going, turned the car off, came back about 30 mins later, started the car, tried the a/c again and it worked fine. The factory did say that turing the temp control all the way can "trick" the temp control and it takes approximately 5 mins (I think) for it to adjust itself. Hasn't happened since. However, this did happen on my wifes Lexus once and we couldn't believe it! Good luck finding the problem.
Drifting
Joined: May 2000
Posts: 1,917
Likes: 3
From: Southern NH
Re: Help!! Dual Zone Airconditioning Failure (Mickyd747)
QUOTE
>One thing you can try is pulling the A/C unit's fuse (or disconnecting the battery temporarily) and reconnect>
That's interesting. The problem developed after I disconnected the battery on Sunday.
Mike
98 Vert Torch Red
>One thing you can try is pulling the A/C unit's fuse (or disconnecting the battery temporarily) and reconnect>
That's interesting. The problem developed after I disconnected the battery on Sunday.
Mike
98 Vert Torch Red
Good luck.
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Thread Starter
Advanced
Joined: Sep 2001
Posts: 55
Likes: 0
From: Miami fl
Re: Help!! Dual Zone Airconditioning Failure (JC in XTC5)
Thanks for the help everyone. I disconntected the battery, and after reconnection the A/C came back up working correctly.
Mike
98 Vert Torch Red
Mike
98 Vert Torch Red
Melting Slicks
Joined: Sep 2000
Posts: 2,756
Likes: 5
From: Satellite Beach, FL, USA
Re: Help!! Dual Zone Airconditioning Failure (Mickyd747)
I had the same problem. Tech claims duct door seal on driver side got stuck. He claims he coated it with silicone grease.
Another option is a vacumn hose to the "motor" being broken or damaged.
Another option is a vacumn hose to the "motor" being broken or damaged.