Bought this condenser dryer yesterday. Was ripped off as it was not working, from coming across information online one of the problems was the door clip was missing, which it located at the 12 o clock inside Door, I'm using a wall plug for it (til I can get proper part) when running its very noisy, at this I took metal cover off at the back which is located on the bottom left hand corner, dryer working fine and so quiet with metal cover off... But with metal cover on it seems to be very noisy. Any help on the matter please??