The thermostat in your camper is a "low voltage" thermostat and operates with 12vdc to operate the control boards in the furnace and air conditioner(s). The control board in the air conditioner controls the 120vac for the compressor and the fan by operating relays.
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Marshall
2012 Laredo 303 TG
2010 F250 LT Super Cab, long bed, 4X4, 6.4 Turbo Diesel
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