Blower fan not working

Hello

The other day driving home from work my inside fan stopped working, the one where you can have the air con on or use it as a heater. It will now not turn on and no air will come out. I have had the fuses checked but they are still ok. However, the rear window heater button still works.

I am wondering what the problem could be? Is it the switch or is it control part which I turn to put it on or off?

My dad said to try a new control part to see if this solves the issue but would like some advice first.

Any advice or help would be fab.

Many thanks
Charley Strevens