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AC Unit

Old Mar 29, 2013 | 04:57 PM
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Default AC Unit

My AC unit is acting up.... The air coming from he passenger side vents is ice cold, however, the air from driver side and the center dash is warm.....

I want to think that if it were a compressor problem, that it would be consistently warm, but I'm no mechanic!

Anyone have any thoughts?
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Old Mar 29, 2013 | 06:23 PM
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I have read that some times for who knows why the doors get out of sync on the HVAC unit and that sometimes when you disconnect the battery for 15 mins it will re sync it.
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Old Mar 29, 2013 | 06:25 PM
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Also, check your codes in the HVAC .
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Old Mar 29, 2013 | 06:42 PM
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I had the same problem and took it to the best vette tech in Reno. He reset something (nothing mechanical) and fixed it. The invoice said he did a "SYSTEMS PEWRF AND EFI SCAN SYNC", whatever that means. It was done two years ago and still works fine.
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Old Mar 29, 2013 | 07:33 PM
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No HVAC codes, however there quite a few other codes.

Anyway to decipher them?
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Old Mar 29, 2013 | 07:34 PM
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Originally Posted by Mr.Bill
I have read that some times for who knows why the doors get out of sync on the HVAC unit and that sometimes when you disconnect the battery for 15 mins it will re sync it.
It's actually not only he driver door, but the center vent above the radio as well.
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Old Mar 29, 2013 | 09:14 PM
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Originally Posted by DeeHutch
It's actually not only he driver door, but the center vent above the radio as well.
I was talking about the doors in the HVAC unit, Not the doors on the car. The diverter flaps.
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Old Mar 29, 2013 | 10:43 PM
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(noob to C5)

Soo, what about deciphering the other codes its showing? Just for common knowledge. How much attention should be paid to the fact that its throwing like 6 codes?
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Old Mar 29, 2013 | 10:57 PM
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Originally Posted by DeeHutch
(noob to C5)

Soo, what about deciphering the other codes its showing? Just for common knowledge. How much attention should be paid to the fact that its throwing like 6 codes?
Here you go, This might help, Remember a C after the code is current and needs to be looked at, An H after the code is history and can be cleared.
Here is a file of some of the codes.
Mr.Bill
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File Type: pdf
C5_DTC.pdf (35.4 KB, 322 views)
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Old Mar 29, 2013 | 11:05 PM
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Thank you kind sir!

All my codes were H and were LDCM and RDCM related.

Soo, for the AC issue, what would you suggest?

Try unhooking the battery as you stated above?
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Old Mar 29, 2013 | 11:12 PM
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Originally Posted by DeeHutch
Thank you kind sir!

All my codes were H and were LDCM and RDCM related.

Soo, for the AC issue, what would you suggest?

Try unhooking the battery as you stated above?
I would give it a try, But before you do make sure your radio security isn't on and if it is make sure you have the code or it will not work after you hook the battery back up. If the security is on the radio will have a red flashing light when the car is off.
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Old Mar 29, 2013 | 11:34 PM
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Ooohhhh, good call on the radio.

Thanks..
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