Michael JameS could be an issue with your airflow mode actuator. I'll attach the HVAC part of the manual. It will show you how to test the voltage on the terminal wires for the airflow mode actuator and more. Mazda-6-HVAC-Service-Manual.pdf
We have a chance to guarantee our right to repair electronic
equipment—like smartphones, computers, and even farm equipment. This is a once-in-a-generation
chance to protect local repair jobs—the corner mom-and-pop repair shops that
keep getting squeezed out by manufacturers.
Join the cause and tell your state representative to support Right to Repair. Tell them you believe repair should be fair, affordable, and accessible. Stand up for your right to repair!