the dryer has a terrible grinding noise when it is tumbling. it doesnt vibrate and goes through all the actions of drying but it is so noisy it sounds like it is about to blow up! also it has started to "not be as hot" as it normally was.
Caused by mechanical wear on the jockey pully and/or drum front wheels/supports. Might be worth repairing if everything else functions ok. Ring a service centre & ask for a price estimate.