I dont know if itll hurt anything with the newer AC setups. My old truck would run the defrost without AC unless I hit the AC button which was an AWESOME setup. I could run it when needed and shut it off when all was clear but leave air blowing thru the vents. My cars AC doesnt work so I just run outside air thru the defrost and it seems to work really well. Maybe you can figure out how to run a switch to the AC so itll run when you desperately need it and only push air when you dont.
Matt
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