No Cold Air After 8.4 Upgrade

[fermorales0731]

So I did a whole interior swap on my truck and today I finished the 8.4 upgrade portion. I now have heated and vented seats, also the seats are electric adjustable, so everything works on my 8.4 except for cold air. Hot air just fine, in between air just fine, but i can’t get cold air out. Before I swapped out the old setup I had freezing cold air, I went back and checked everything to be connected right and everything is good! Any help would be appreciated TIA

 

[wutech]

I think you need to provide some more information, did you have ATC before with 2 zones, or with 1 zone, was it MTC with the 4 speed fan and you upgraded to the 7 speed fan switches? Just adding the 8.4 isn't enough information for what you all did.

How long ago did you do the upgrade, have you given it enough time to read the ECU and actually adjust itself for the computer data? Some trucks it can take several hours if you don't have AlfaOBD or JScan to force the ECU resets.

 

[fermorales0731]

It had A 7 speed fan from the factory and it was Singke MTC, and it’s been a day since I put everything in

 

[fermorales0731]

Update: It was the climate control module, now everything works as it should and it’s blowing cold!