Most cooling fans when they run, run for a short time without AC engagement. Even 400 watts is not bad as long as its less than a few minutes in an hour. When you use a component like a cooling fan, just imagine how much it runs in bumper to bumper traffic 110 F ambient and you are running the AC on max for every second of an hour, with fans running constantly.
Your car won't melt, unless it has other potentially catastrophic failures there already.
If you hear the fan running too much, and your block is like mine, then pull out one of the three pieces and put it around the spare tire.
regards
Mech
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