Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.As long as the compressor is not coming on your not going to get any cold air, before you consider replacing any thing the first things you need to do is check to see if the AC system is full of Freon as well as checking both heater hoses at the firewall on a warmed up engine to see if both are getting hot indicating you have good flow through the heater core. Check these two things for me and post back with the results and we can work from there.
If the system is full of coolant and the thermostat is working properly the hoses should be to hot to hold on to, 90 degrees is on the cool side. If you think the hoses are hot enough at the firewall then the problem may be under the dash with one of the blend doors. Before you do anything else, lets try a reset on the control panel, to do this disconnect the negative battery cable for a few minutes and then recheck the AC/heater operation.
Try running the self test once again for me and do it with these steps. Press the "fan up" and "fan down" buttons at the same time. "00" will appear. Press "auto fan" and check for trouble codes
If the vents are controllable and the heater hoses and core are getting hot then you really should have heat. Are you sure the heater core is getting hot?
Okay then you back to some sort of control issue , if the core is hot and the controller is controlling air flow the heater should be getting hot.
From everything we have already checked it sounds like it should be working, you say the controller works with proper air flow and the heater core is getting hot. At this point I am out of ideas. If you would like me to open the post back up to see if someone else has something different to offer I can do so. Let me know.