Dryer runs but doens't heat

I have a White-Westinghouse Dryer and it’s exact model number is not listed on most websites. The dryer runs like usual but is not heating anymore, clothes will not dry. I’m not sure what part is needed to be replaced. I have the original manuel but can’t clearly see all the components of the dryer without completely unassembling it. Can you help? Any information would be great… really need to know what’s wrong with it or what to look for so I can get a replacement part.
Thanks!
wisconsin woman with wet clothes:confused: