Air Conditioner Issue
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6th Gear
Joined: Mar 2026
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Air Conditioner Issue
I’m new to Corvettes. Thanks to all the people that put in the hard work for this board.
I have a 2002 Z06 that I recently acquired. I’ve learned a lot from this forum, but the air conditioner is kicking my butt. It blows cold on the passenger side, but hot on the driver side. When I pull the codes up it says that it has no comm. The compressor seems to be kicking on and it should be serviced within an ounce or two. Any suggestions would be greatly appreciated.
Also, if it’s a blend door, where is the best place to buy one? The car has several electrical issues, but this is the most pressing issue because it is starting to get hot in Birmingham, AL.
Thanks!
I have a 2002 Z06 that I recently acquired. I’ve learned a lot from this forum, but the air conditioner is kicking my butt. It blows cold on the passenger side, but hot on the driver side. When I pull the codes up it says that it has no comm. The compressor seems to be kicking on and it should be serviced within an ounce or two. Any suggestions would be greatly appreciated.
Also, if it’s a blend door, where is the best place to buy one? The car has several electrical issues, but this is the most pressing issue because it is starting to get hot in Birmingham, AL.
Thanks!
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,360
Likes: 3,942
From: Cape Coral, Florida
I’m new to Corvettes. Thanks to all the people that put in the hard work for this board.
I have a 2002 Z06 that I recently acquired. I’ve learned a lot from this forum, but the air conditioner is kicking my butt. It blows cold on the passenger side, but hot on the driver side. When I pull the codes up it says that it has no comm. The compressor seems to be kicking on and it should be serviced within an ounce or two. Any suggestions would be greatly appreciated.
Also, if it’s a blend door, where is the best place to buy one? The car has several electrical issues, but this is the most pressing issue because it is starting to get hot in Birmingham, AL.
Thanks!
I have a 2002 Z06 that I recently acquired. I’ve learned a lot from this forum, but the air conditioner is kicking my butt. It blows cold on the passenger side, but hot on the driver side. When I pull the codes up it says that it has no comm. The compressor seems to be kicking on and it should be serviced within an ounce or two. Any suggestions would be greatly appreciated.
Also, if it’s a blend door, where is the best place to buy one? The car has several electrical issues, but this is the most pressing issue because it is starting to get hot in Birmingham, AL.
Thanks!
If just blowing cold on the passenger side sounds like the system needs to be charged and if it does you should look for a leak...AC work like servicing is not for the DIY'er...you have a "no comm" with what ??...what module ??...the compressor "seems" to be kicking on ??...do you know what you're looking for when it engages ??
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,360
Likes: 3,942
From: Cape Coral, Florida
For any module "no comm" the first thing to check is that modules powers and grounds...there normally is an ignition feed and a battery feed and 1 or 2 grounds...you should also check the splice pack near the BCM with the WHITE wire...remove the "comb" off the splice pack (Star Connector 1) and make sure the comb is corrosion free...I'd also make sure that white wire is not broken between the HVAC Module and Star Connector 1.
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Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,360
Likes: 3,942
From: Cape Coral, Florida
Which "ground packs" did you check ??...if you are referring to both of those splice pictured those packs they are NOT grounds but instead your class 2 serial data is sent over these wires and you don't check them using resistance and did you check "powers" too ??...sounds like this testing may be over your head...you should seek out an auto electric shop in your area....on the splice pack wires you will see a 0-7 volt square wave on a labscope.