Hotpoint SUTCD97B6GM dryer

Hi this dryer apparently makes a squealing noise after 30/40 mins when i called it of course would not do it ,however i noticed also that the pump was running continuously , i had this once before and found i could rewire the pump directly through the micro switch ( as earlier models ) which worked fine, i appreciate the problem was caused by the pcb anyway has anyone had a noise problem or fault of the pump running continuously on this or similar late models thanks John