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in most rv's the auto is the fan speed for the A.C.
in mine the heat works of the zone 1 thermo ..
but only has 1 speed fan as its in the floor ducts
with ac mode i can set auto .. or select speed of fan ..
or just run fan with out heat or ac to circulate air
mine i have to manually select heat or ac
but can run heat on zone 1 and ac on zone 2 ac
counter productive if vents are open for ac
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2018 Cougar 25RES 5'er
2019 Duramax 2500 CCSB SW
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