Hi guys noob here I bought my first car beginning of the year an A4 2nd hand (love the car) except for a problem that's bugging me after about 30min of driving and arriving at home my car smells of heat temp gauge is like 1mm below 90 always except when cold obviously now I've noticed there's a belt run fan and an electric fan the electric fan never runs only if I use the A/C should it be running when cars warm or is it strictly for A/C?
Also is the temperature too high?

Thanks in advance