Is there a link between the auxiliary heater recall and a heater//blower system failure in a 2013 Q5?

I ask because since purchasing my Q5 in 2013, I have had the motor rebuilt, an axle replaced, and now my heater/blower don’t work.

i am scheduled for the recall repair but don’t have the knowledge/expertise to know if there is a correlation.

I am beyond frustrated with my Q5 but have always kept up with the scheduled maintenances and recalls- so To look at another multiple thousand repair is really upsetting.

Any thoughts?