Old Akro.
Ok mate no need to be a smart a$$.
Was just asking the question.
I know you need moisture, which is always present to a varying degree.
Also you need the temperature drop at the Venturi to be below the freezing level.
I gather you are saying that it would be impossible for the formation of ice with carb heat on all the time.
The guys here for the most part have been keeping these discussions civil which I think is fantastic.