I have found a site - www.dryerhelp.com and it is worth a read as it says could be the belt or to do with the motor starting up - if you go to the site it is very good and gives you tips on how to find out which one it is. Looks like a service engineer job either way!
Sue
Sue
March 2008
I don't know the answer but I have the same problem with mine, it is an LG Condensing Dryer and it is only l5 months old. Could it be the 'belt'?