No Interior Fan and No Snow Flake

[Boxing Cat]

Hi I’m a new owner and I’m looking for a hand with my first problem.

It is a 2003 with automatic climate control. My HVAC fan stopped working over the weekend while I was driving. The fan/blower does not work at any setting (low speed, high speed, auto, manual, or defrost). The AC snowflake symbol does not light up either. Also new strange behavior, when in manual the fan speed bar graph will change by itself but obviously the fan is not responding. There are no other symptoms, all other accessories are functioning.

I did some reading and it sounds like one of the following:

• Bad relay. (not sure if this would account for the AC and manual fan speed changing)
• Bad control unit.

After I check the relays, are there any other things I should check before moving to replace the control unit?

The car has 12k miles on it.

Thanks,
Dave