My brother as a White Knight tumber dryer, & his did the same thing. Bolts on the back of drum had come lose, causing the drum not being central.
So that what was causing the banging
thank you so much. we did have to replace the belt a few months ago and the guy had to slacken the drum. thank goodness its nothing to serious. thanks again
Oh dear I've just bought a White Knight tumble drier, it was recommended and I'd never heard of them before. How long do they last before they start going wrong and are they expensive to fix ??