Possibly the overheat cutout has tripped. If I knew your machines model number I could search for the manual and see if it was mentioned in there, or I could search online for something like XXX cutout.
But I don't know so I can't.
If that was the cause, give the machine and all its filters, hoses etc. a good and thorough clean and de-fluffing.
Ghfdh, January 2023
