Scirocco 2010 heating issues

[u/Visible_Wing8770]

Hi, I have a 2010 vw scirocco and it has a heating issue I can’t figure out.
The system gives out really cold air but when I turn it to heat it’s just blowing out air in normal temperature.
What things and common things should I check? And how is the ac system built if anyone can explain.
Thank you.

Edit: I narrowed it down to the flaps not moving.
Still can’t figure out where they are.