Need tech help
Thread Starter
2nd Gear
Joined: Jul 2019
Posts: 2
Likes: 0
Need tech help
Hello,
My 2015 C7 Stingray was blowing hot air only out of the vents so i took it to a local repair shop for diagnostics. They said they attempted to perform a software upgrade but it failed. They claimed I needed a new air conditioning control module and when they returned the car to me none of the climate controls were working and no air was blowing out at all.
I bought a new air conditioning control module and installed it but the lights still stay off and I can’t do any climate controls. The LCD screen and radio/media controls are working fine. We checked all the fuses and don’t see any bad fuses either.
Any help would be appreciated!
Thank you
My 2015 C7 Stingray was blowing hot air only out of the vents so i took it to a local repair shop for diagnostics. They said they attempted to perform a software upgrade but it failed. They claimed I needed a new air conditioning control module and when they returned the car to me none of the climate controls were working and no air was blowing out at all.
I bought a new air conditioning control module and installed it but the lights still stay off and I can’t do any climate controls. The LCD screen and radio/media controls are working fine. We checked all the fuses and don’t see any bad fuses either.
Any help would be appreciated!
Thank you
Last edited by Dsampson01; Jul 22, 2019 at 03:26 PM.
Drifting
Joined: Sep 2017
Posts: 1,464
Likes: 771
From: Miami
C7 of Year Finalist (performance mods) 2019
Could it need a recharge?
Here is where the LP port is:
https://www.corvetteforum.com/forums...-location.html
Here is where the LP port is:
https://www.corvetteforum.com/forums...-location.html
Drifting
Joined: Dec 2015
Posts: 1,410
Likes: 414
From: Germantown Maryland
Were the hvac controls functional before you took it to the shop but just blowing warm air? If so, they may have bricked the module and the new one might need to be programmed or something. But I don't know if there is anything special the module would need to be activated. And then you may still have a separate AC issue.
Racer
Joined: Mar 2015
Posts: 344
Likes: 108
HVAC Module Replacement
From the 2015 Service Manual, when the HVAC control module is replaced, it needs to be recalibrated, with or without a scan tool.
The procedure without a scan tool:
Clear all DTCs
Ignition OFF
Install/connect the module
Connect all previously disconnected components
Remove the HVAC module fuse for a minimum of 10 seconds
Install the fuse
Start the vehicle
Wait 40 seconds for the HVAC control module to self- calibrate
Do not adjust any HVAC controls during this self-calibration process
The procedure without a scan tool:
Clear all DTCs
Ignition OFF
Install/connect the module
Connect all previously disconnected components
Remove the HVAC module fuse for a minimum of 10 seconds
Install the fuse
Start the vehicle
Wait 40 seconds for the HVAC control module to self- calibrate
Do not adjust any HVAC controls during this self-calibration process
Last edited by snomuncher; Jul 22, 2019 at 11:02 PM.
