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DN randomly vending wrong flavor, please help.


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I have a DN soda machine that will randomly vend Mt Dew instead of Coke, when Coke button is selected. Doesn't happen all the time, just randomly. All other buttons vend the correct sodas. I have not loaded Mt Dew in the Coke chamber, either. Any suggestions or help is appreciated, thanks!

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I was going to say a selection switch but since you say it ONLY happens to the coke WHEN you press the coke button, then the only two things that come to mind are a STS setting (very very unlikely) or maybe a wire is frayed or cut and it is causing the dew to complete the circuit rather than the coke.

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That will be a sticky motor brake on the column that vend wrong. That motor probably stop with both switch arms in the timing cam notch.  That then causes the column to pre-select it's flavor because that motor starts as soon as a credit is set.  You can try a new motor cluster switch or spray the motor brake pivots with glass cleaner to clean the pivots.

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