Yes, it runs even when you turn the thermostat to "Off".
Not just Vendos, the 99-% majority ( bad political pun...sorry!
) of all soda machines have evaporator fans that run all of the time, some modern soda coolers have electronically controller evap' motors that slow down or stop to save energy along with LED door lighting, etc. but these "Fred-Flintstone" machines have full time evaporator fan motors. they do take a beating for it too, but I've seen motors on 60 year old machines that don't miss a beat ( until you try to clean them that is)