John,
Randy's info is good and maybe helpful to you. The nickels, dimes, quarters, and dollar
coins are all programed into the
changer when we receive it, so I am not sure there is any problem with the programming. I called my Mar's repair guy to ask him what might cause this problem. He tells me the most common reason may be that the
coin sensor (a round silver looking item that senses the
coin) is loose (you can move it) or the sensor is very dirty. If the sensor is loose you can hot glue it down; if the sensor is dirty the repair guy suggest using foaming window cleaner and a Q-tip.
If these actions do not help, the
changer may need to be sent in to be serviced and cleaned. I can give you the address of my repair company if you want to send it in yourself to have the
changer "tuned up" to be like new.
Uncle Sam