When i had this problem i took the big filter out (not the fluff filter in the door), stood it in the bath and showered it with a powerful jet of water from the shower. You wouldn't believe the amount of stuff that washed out of it!! Let it dry completely, put it back in the dryer, and it should work....
Al
October 2011
check stat and heating element for breaks.
killerdanny
October 2011
I can answer this question...
7kg condenser dryer aquarius ctd40 hotpoint blows cold air out?
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix tumble dryers.