I run dual fans through the 6.4 ECU. Sublime has a provision for AC but it's basically just a relay that kicks on the compressor through the factory harness.. just needs a 12v trigger from the AC on switch. My fans don't kick on with the compressor, so I typically wait until they kick on before turning on the AC. That needs to change tho. I'm waiting on a answer about being able to trigger the fans with the ac, without it somehow backfeeding into the ECU and causing damage. I'll try to get plenty of pics and maybe some video of it all.. Won't charge it till spring tho.