We always use our dryer on timed dry, yesterday we went out and left in on. When we came back after 3 hours and it was still working :eek: . It actually went all the way to "cool down" but it just didn’t stop.
We tried again but this time we noticed it’s not heating anymore, still goes all the way to "cool down" but, again it doesn’t heat and it doesn’t stop but manually. We are complete novices when it comes to dryers 
, please help!!! Were shoud we start , what should we do? 
Thank you!