2015 HVaC
Thread Starter
Racer
Joined: Dec 2001
Posts: 267
Likes: 24
From: Soddy Daisy TN
2015 HVaC
I have a very early 2015 and the HVAC system just doesn't seem to cool and vent like it should based on other corvettes that I have owned. What info can anyone give me about a HVAC module re-flash?
Melting Slicks
Joined: Jan 2004
Posts: 2,299
Likes: 387
From: Fort Worth TX
St. Jude Donor '14-'15
Team Owner
Joined: Nov 2007
Posts: 45,272
Likes: 8,545
From: Rochester, NY
Safety Car
Joined: Sep 2001
Posts: 4,495
Likes: 1,263
From: Jacksonville FL
Mine was built in October, 2014 and I noticed my AC was not a cold as my C-6. The more I used the AC the colder it got and now after several months it is cooling properly. Maybe just use it for a month and see if it gets better.
Burning Brakes
Joined: Nov 2001
Posts: 973
Likes: 221
From: Lake Norman NC
TOTTALY AGREE, I feel the same way my early 2015 does not cool efficiently like my c6 did. My HVAC cut out on a mountain run no ac at all, the next day start up corvette AC running cool again, must be calibration glitch in the HVAC, hopefully they find the problem and a simple re-flash like you stated will be the fix.
Thread Starter
Racer
Joined: Dec 2001
Posts: 267
Likes: 24
From: Soddy Daisy TN
Update. My c7 was built on the first day of 2015 production so I've had a little time to experience the HVAC issue. It just didn't perform the way it should based on temp settings. I had asked dealer about it at first oil change but they didn't find a issue. Second oil change yesterday and they updated the HVAC module with latest software. HVAC system works perfectly now. Cools like it should have from the beginning.
Melting Slicks
Joined: Nov 2000
Posts: 2,333
Likes: 32
From: USA
Update. My c7 was built on the first day of 2015 production so I've had a little time to experience the HVAC issue. It just didn't perform the way it should based on temp settings. I had asked dealer about it at first oil change but they didn't find a issue. Second oil change yesterday and they updated the HVAC module with latest software. HVAC system works perfectly now. Cools like it should have from the beginning.
Is there a GM update number or anything that will help the technicians find the update?
Melting Slicks
Joined: Jan 2004
Posts: 2,299
Likes: 387
From: Fort Worth TX
St. Jude Donor '14-'15
Tons of info on "Google", all you have to do is ask.
I used the "Torque Pro" App on my phone https://play.google.com/store/apps/d...l.torque&hl=en
along with an plug-in OBDII Bluetooth from Amazon ($15) to read all my fault codes (C6)....and reset them. I haven't tried to run it on the C7 yet but according to what is written, it should work the same. You will have to do a search for the C7 "U-Codes" or DIC Codes to decipher them. If the car is throwing an "A/C CODE", it will show up on this app. Great info for just a few bucks.
I used the "Torque Pro" App on my phone https://play.google.com/store/apps/d...l.torque&hl=en
along with an plug-in OBDII Bluetooth from Amazon ($15) to read all my fault codes (C6)....and reset them. I haven't tried to run it on the C7 yet but according to what is written, it should work the same. You will have to do a search for the C7 "U-Codes" or DIC Codes to decipher them. If the car is throwing an "A/C CODE", it will show up on this app. Great info for just a few bucks.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Burning Brakes
Joined: Nov 2001
Posts: 973
Likes: 221
From: Lake Norman NC
Tons of info on "Google", all you have to do is ask.
I used the "Torque Pro" App on my phone https://play.google.com/store/apps/d...l.torque&hl=en
along with an plug-in OBDII Bluetooth from Amazon ($15) to read all my fault codes (C6)....and reset them. I haven't tried to run it on the C7 yet but according to what is written, it should work the same. You will have to do a search for the C7 "U-Codes" or DIC Codes to decipher them. If the car is throwing an "A/C CODE", it will show up on this app. Great info for just a few bucks.
I used the "Torque Pro" App on my phone https://play.google.com/store/apps/d...l.torque&hl=en
along with an plug-in OBDII Bluetooth from Amazon ($15) to read all my fault codes (C6)....and reset them. I haven't tried to run it on the C7 yet but according to what is written, it should work the same. You will have to do a search for the C7 "U-Codes" or DIC Codes to decipher them. If the car is throwing an "A/C CODE", it will show up on this app. Great info for just a few bucks.
Advanced
Joined: Jul 2014
Posts: 58
Likes: 1
The C7 has a very hot cabin, sitting between that V8 and the tranny. I initially tried to run my AC on manual and bi-level and it just did not cool enough. I found that just putting it in Auto and dialing the temperature down to 68 deg and the fan will blow hard until it cools off. Don't forget to run your seat fans, that helps a lot with your comfort.