I do not know what parts are on top of the freezer but there should not be any. The two most likely reasons are a freezer that does not get cold enough, that would have made the IM work slowly, and if it got worse then it would not make any ice at all. Or the IM could be defective so it is not sensing when the freezer has reached the proper temperature, in which case the IM probably has to be replaced. But check the internal temperature first. If it does not reach about 15 degrees F. the IM will not work.