I was just wondering if you all could give any help.

When I took the car in, my service rep told me it was probably an actuator door, but after further inspection this is what they found:

"8418 UPDATED PROGRAM FOR HVAC MODULE CHECKED FOR CODES, NO CODES. CHECKED FOR HVAC UPDATES AND UPDATED WITH ALL CURRENT CALIBRATIONS. CHECKED OPERATIONS, OK."

The problem is that it's not OK. It still won't blow ice cold. It comes out somewhat cool, but not cold. He said they checked the freon and it was fine. Is there anything else it could be? Is there a possibility that the freon is bad? Is that possible?


Any suggestions or info would be appreciated.

TIA,

Mike

 

every one is saying to much pressure get it lowered it works fine

 

That's true on the early 05's when they are in real hot weather. I think there's a TSB on it.

 

Does anyone know what the TSB number is?

 

I think you need a different dealer for service. My '05 had a major problem requiring removal and replacement of the entire system. It runs fine now - they never did figure out what the problem was despite al manner of computer scans and flying in an engineer from Troy. I doubt your problem is as serious and suspect coolant levels may well be the issue.

 

One other thing I forgot to mention is that it is basically on the driver's side. The passenger side seems to work fine.

 

I had a similar problem. A/C would blow cold air as usual then out of nowhere hot air, then cool air, then cold air again. Took it to the dealer who said it was the internal thermostat. Replaced it and it works fine again. It was an electrical problem that he blamed on the intense heat wave that passed over us. He said I used the a/c so much it just died.

 

Document ID# 1850187
2005 Chevrolet Corvette


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Subject: Info - Contaminated R134a Refrigerant Found on Market for Automotive Air-Conditioning Systems #06-01-39-007 - (07/25/2006)



Models: 2007 and Prior GM Passenger Cars and Trucks (including Saturn)

2007 and Prior HUMMER H2, H3

2007 and Prior Saab 9-7X



Attention: This bulletin should be directed to the Service Manager as well as the Parts Manager.



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Commercially Available Contaminated R134a Refrigerant
Impurities have been found in new commercially available containers of R134a. High levels of contaminates may cause decreased performance, and be detrimental to some air-conditioning components. Accompanying these contaminates has been high levels of moisture.

Tip
Excessive moisture may cause system concerns such as orifice tube freeze-up and reduced performance.

Industry Reaction: New Industry Purity Standards
Due to the potential availability of these lower quality refrigerants, the Society of Automotive Engineers (SAE), and the Air Conditioning and Refrigeration Industry (ARI) are in the process of instituting reliable standards that will be carried on the labels of future R134a refrigerant containers. This identifying symbol will be your assurance of a product that conforms to the minimum standard for OEM Automotive Air-Conditioning use.

How Can You Protect Yourself Today?
It is recommended to use GM or ACDelco® sourced refrigerants for all A/C repair work. These refrigerants meet General Motors own internal standards for quality and purity, insuring that your completed repairs are as good as the way it left the factory.

Parts Information
The part numbers below are available through GMSPO or ACDelco®. The nearest ACDelco® distributor in your area can be found by calling 1-800-223-3526 (U.S. Only).

Part Number
Description

12356150

(in Canada, use 10953485)
30 lb container R134a

15-119

(in Canada, use 10953485)
30 lb container R134a (ACDelco®)




GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© Copyright General Motors Corporation. All Rights Reserved.


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Document ID# 1850187
2005 Chevrolet Corvette

 

If that is the case it has always been a temp valve actuator. It is a common problem with all Corvettes and we have replaced a few on the C6's.

 

I have a 2005. After driving the car for a while and then shutting off the car for ten minutes or so upon restart the a/c blows hot. I have to shut off the air and turn it back on to fix the problem. Just a note, I always shut of the a/c before turning off the car, just an old habit. I figured there is some sort of sensor that is malfunctioning. Anybody else experience this?

 

Mine blows hot on restart for a while too. Haven't had it in - just wait for the cool (aout 2 mins).

 

GM A/C would work well in hell. If it doesn't work correctly, it has a mechanical problem that needs to be repaired, not because the weather got hot.

 

I believe they already checked that and they were said to be working fine.

 

That's what I've always known to be true.

 

I have never seen the problem be linked to another part with that concern. There is not many other parts that control air flow from one side to the other.

 

I don't know. I'm confused. This is my 6th Corvette and I've never had a problem with the A/C in any of them but this one.

It is at a different dealer now being checked out. They're going to call me shortly to see what the deal is.



The rep (who is a very good friend of the family and takes very good care of me) told me that there is a bulletin to raise the refrigerant to 1.4lbs and another to lower it to 1.1.

 

The correct one is to lower it to 1.1 lbs. That concern is for the AC intermitantly changing from hot to cold, but not only from one side.

 

 

In this case it's not the 134a. It sounds like a vent door is not working or the thermostat for the drivers side.

 

Or a faulty HVAC control module. Can't be much else if it cools on the passenger side.