no air flow through vents, 2013 Chevy Impala LS
Hello everyone! I'm new here, searching for the issue with my car's HVAC system. The problem is that I have no air flow (heat or a.c.) through the vents, but I do get some cold air flow with a.c. on full blast only when it is on the air flow from outside and only while car is in motion. I know my blower motor is working as it went out last year and I replaced it, and I hear it blowing and changing speeds when I change the a.c. dial. I just replaced the resister a few weeks ago, thinking that must've been the problem, but still no air flow. I checked the fuses and relays which all seemed to be fine. Next, I replaced the a.c. high flow switch/transducer and it's still not working. I also recently replaced all three of the hvac door actuators, though I don't think they would cause the vents not to blow. So next on my list is that it could possibly be a clog in the condenser not allowing air flow, or maybe the compressor clutch or the compressor altogether is bad? Could it be the control switch on the dash/console, or the wires/harness going to the resister? Or a hose clog or break? I'm wondering if anyone else has had experience with this type of issue, and how I may be able to figure out the issue without continuing to just replace parts unnecessarily? I'm really trying to take care of everything myself instead of tasking into a shop. I appreciate any feedback here!