Car wash vending machine

[aca carwash 2]

I have a 6 column vending machine. one column when you fill it buzzes and automatically starts dropping product. I initially unplugged the unit but it didn't help, I then checked the fuse but it was ok. Any idea what it could be? there is (I guess its a solenoid on the top shelf) could it be that? Any suggestions?

 

[MEP001]

I assume it's a D&S unit - IIRC the relays go bad. Call them - they'll confirm the problem and sell you a replacement part.