I also think it’s not a great idea. An easy idea is to send one sucker into the trailer to turn on the heat while the others sit in the warm car until the trailer is also warm.
My ducts are unobstructed when the slider is in, so heat can go on as soon as I park.
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-Scott, DW, DG, DB, and DD
2011 Passport 2590BH
2009 Ford F150 SuperCrew F X4 5.4L w/Max Tow
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