I just got a Dixie - Narco 6 selection pepsi vend and the problem is, vend slot number 3 will continuosly vend until empty. No coins needed, just activate the switch with soda and it keeps running. Number 5 slot works as it is supposed to and all the rest, numbers 1,2,4,& 6, will not vend at all. I checked selection switches and they all seem fine.Out of stock switches seem fine too. Cam positions are just how the manuel says to set them. Im no expert but everything appears to be the way it should. Any suggestions would be greatly appreciated. Thank you in advance.