In my vacuums I am using a Ginsan multitron coin acceptor and a Kleen-rite KR-9 timer. The problem I am having is that sometimes it stays running longer than it should. It will shut off on its own after a while. Does anyone know if I should change the timer or the coin acceptor first. If I change one, I won't be sure if its fixed for a while since it only does it once in a while. Also is there any difference between Ginsan timer gs-403 and Kleen-rite timer TIKR 403. thanks