We reviewed other people's experiences and concluded we should replace thermal fuse, thermal fuse assembly and dryer thermistor, mainly because it was easy to do all three once the drum was removed. The videos were excellent, and we disassembled the dryer in just a few minutes and as we removed the drum we saw that the idler pulley had disintegrated. We had likely misdiagnosed the problem. We went ahead and replaced the three electrical components anyway, put the machine back together and ordered the idler pulley assembly. More to follow!