I'm experiencing a unique HVAC issue with my 2004 Petrol L322 and haven't found a thread that directly addresses this problem.

Issue Summary
Front vents: No air output at all.
Rear vents: Blowing at maximum speed, regardless of settings.
HVAC Control Panel: LEDs function correctly, and knob adjustments register visually, but they don’t affect airflow.
Temperature Control: Adjustments on the HVAC unit seem to change the temperature in the rear.
Heated Front Seats: Working as expected.
Repairs Attempted: Checked fuses (all seem fine) and replaced the front final stage resistor (FSR), but the issue persists.

I'm looking for insights or suggestions on what could be causing this. Could it be the front blower motor, blend motor, a wiring issue, or something else? Any guidance would be much appreciated!