Hi, I've found the fault on the internet on a few sites and the fault is the Relay PCB. A new one can be bought from http://www.espares.co.uk/part/tumble-dryers/hoover/hdv6uk/p/1088/107/0/677491/209751/relay%2fpcb.html?k=relay
for £11.99, but it looks as though you have to take half the machine to bits to fit it. Oh not bad for £11.99 - Good luck, just off to order mine now.
Mark in Dorset, December 2007