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I could be wrong. Just going off what I saw here https://www.f150forum.com/f2/seats-cooled-vs-ventilated-413919/index3/I’m sure your wrong, it is a two way system . The current goes one way and it heats, reverse it and it cools I believe. It works great in summer when I’m in Palm Desert (cooling).
My 18' ventilated seats' fans are much louder than the 17' I had and doesn't seem to get as cold. Also for some reason I could of sworn on my 17' it showed AC written on the cooled seat button (memory could be wrong), but now just a fan.