hotpoint aquarius tumble dryer ctd 00p (cold)?

hello, can you help?
i was plumbing in a washer and the customer ask if i could have look at it tumble dryer. it gose around but no heat. the customer says it had a burning smell then went cold, i think it could be the thermisters. has anyone got any info that will fix it and where to get the part.thanks for your time
regards bootneck.