HVAC No Comm. Error Code
Thread Starter
4th Gear
Joined: Mar 2014
Posts: 4
Likes: 0
HVAC No Comm. Error Code
I just replaced my control panel with a rebuilt one. My A/C light comes on and goes off in a second. I have checked my codes and get the HVAC No Comm. error code. I have replaced the fuses to the HVAC, pulled and reinstall the panel, but same problem. Any ideas?
Team Owner
Joined: Jul 2016
Posts: 25,303
Likes: 1,683
From: The Steel City, Colorful Colorado
Winner 2020 C7 of the Year - Modified
What was your previous HVAC doing to cause the replacement?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If for some reason you have a similar issue in the future, get a DC Volt meter and read the VOLTAGE on the fuse for the HVAC head. Our C5 ignition switch can and will go bad and output too low of a voltage and the HVAC Head doesn't work.
All of our fuses have two small test slots on top of each fuse that you can read to ground to see if the fuse is working.
BC
All of our fuses have two small test slots on top of each fuse that you can read to ground to see if the fuse is working.
BC
