As drinkman said check your switches, also check all your motors on each selection and makes sure you don't have a loose wire, are a wire that is disconnected, also rotate each motor, to insure that each motor is working.

I'll double check the wiring. Funny thing is after inserting the required amount, pressing any single selection will dispense the drink like it should. Some how someone figured out how to get two for the price of one. I'm wondering if this is a design problem for the older Vendo models.

Is it the same two selections or any combination? You will probably have to replace the micro switches behind the selection buttons. They are not expensive and easy to replace, its best to do them all, I would also replace the switches on the vend motors as well.

it only works on selections #2 and #1 together and #5 and #4 together. Tried replacing micro swithches behind the selections buttons of the affected selections but not luck. It still gives the free product. I'll try replacing switches at the affected vend motors and see if it'll fix the problem.

Is the free vended product from the same column or different columns? Also just for general puposes make sure the brake is working correctly (not broken, gummed up or spring missing) on the motor and not coasting.

the free vended product is from a different column. This is what happens...after inserting required amount press selection buttton #2 first, and then #1 almost at the same time and machine will give you selection #2 and the free product from selection #1. I hope I explained it to where it makes sense.

Is it the same two selections or any combination? You will probably have to replace the micro switches behind the selection buttons. They are not expensive and easy to replace, its best to do them all, I would also replace the switches on the vend motors as well.

Pressing the 1st and 2nd selections simultaneously will dispense two drinks. Same thing for selections 3 and 4 but does not happen on any other selections. I did replace the micro switches behind the selection buttons of the affected selections but no luck. I'll try replacing the switches at the vend motors and see what happens.

will someone with more experience please reply. I dont have time to be funny, but mrsar66 does. I'm losing revenue here and would really like to fix this problem.