Dual zone A/C
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Joined: Mar 2004
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From: Sanford FL
Dual zone A/C
Hey folks
I have a 1999 convertible with the dual zone a/c. Passenger side blows really cold, about 38 degrees. Drivers side blows cool, but not cold like the passenger side. I changed the sensor on the drivers side. When I set the drivers dial to 60 degrees it gets cold, but not as cold as the passenger side. If I move the drivers dial just a degree or 2 it gets warm. Does something need to be recaliburated? I am at a lost. I would appreciate any help.
Thanks
The Gold
I have a 1999 convertible with the dual zone a/c. Passenger side blows really cold, about 38 degrees. Drivers side blows cool, but not cold like the passenger side. I changed the sensor on the drivers side. When I set the drivers dial to 60 degrees it gets cold, but not as cold as the passenger side. If I move the drivers dial just a degree or 2 it gets warm. Does something need to be recaliburated? I am at a lost. I would appreciate any help.
Thanks
The Gold
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Joined: Apr 2008
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From: Columbia SC
Check your codes, then do a search on "repairing HVAC actuators", "reindexing actuators", etc. until you find the information you are looking for. Sometimes your problem can be fixed by just playing with the settings, or you could very well have the broken actuator gears that are common. Bill Curlee had a post on playing with the settings that has helped some people, and recently there was a post by a guy who had repaired his cracked gears and saved the cost of new actuators. I have saved some of the info to my e-mail; if you don't find what you need get in touch with me and I'll send it to you. But that shouldn't be necessary if you search. Good luck, and damn those useless Dual-Zone units to Hades.
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hmmm...I had that issue but instead of changing the actuator I bought a new controller with the built in logic 2001 and up and that solved my problem
Burning Brakes
Joined: Jun 2010
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From: Rockwall TX
Thats interesting in that I have a 99 Vert with the same thing and always wondered if a new head unit would solve it, or not. I know this doesn't help you, but there probably are others out here with the same prob., like me. So Pewter99, when you had this problem, was your car throwing a code? Or, just not cooling on the drivers side?
Melting Slicks
Joined: Sep 2006
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From: Redding CA
The actuator re-index is free
to the op: you gotta search before you post a thread... there is another topic VERY similar to yours on the first page of the tech section already where I posted a link to this http://forums.corvetteforum.com/c5-t...errerid=228945
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Joined: Mar 2004
Posts: 97
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From: Sanford FL
Thanks for the reply
The actuator I installed was new. There are no broken grears and no abnormal noises. No HVAC codes. when I install another new actuator is there a system I need to follow to recalibrate everything?
The actuator I installed was new. There are no broken grears and no abnormal noises. No HVAC codes. when I install another new actuator is there a system I need to follow to recalibrate everything?
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Drifting
Joined: Feb 2003
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From: North Carolina
Same problem on my 98 last year. It was low on R134 freon. Have that checked before you go tearing apart the dash and HVAC system. There were a ton of posts last spring and summer on the older C5's doing the same as yours is.
Last edited by MAC5; Mar 8, 2011 at 03:52 PM.
Melting Slicks
Joined: Sep 2006
Posts: 2,736
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From: Redding CA
You can pull the AC fuse in the passenger side footwell for a couple of minutes and see if the issue goes away.
It's odd that you don't have a code, you may have to replace the entire head unit as Pewter99 already said.
edit: and DOHHHH...definitely check your R134A high and low side pressures first
edit again: I also have re-indexed my actuators on both sides, the code still came back again after a couple of months...so I re-indexed it again and now it's gone. I'll be getting the head unit either way but it's just more $$
Last edited by 00Corvette; Mar 8, 2011 at 02:26 PM.
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Joined: Mar 2004
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From: Sanford FL
Hey 00Corvette thanks for responding.
Your right I stated sensor, I ment actuator. I apologize. But yea there are not codes. I ran the DIS twice, no codes regarding the HVAC. There were some codes for other items with H behind them but I know the H refer to History. I did clear all codes, no HVAC showed up. I will check the pressure in the system.
With a new actuator will I have to reindex it?
Thanks
Your right I stated sensor, I ment actuator. I apologize. But yea there are not codes. I ran the DIS twice, no codes regarding the HVAC. There were some codes for other items with H behind them but I know the H refer to History. I did clear all codes, no HVAC showed up. I will check the pressure in the system.
With a new actuator will I have to reindex it?
Thanks
