Make sure your heat is set to off when you scroll thru the modes and your fans are set to auto on the fan selector. then put the thermostat in cool mode for both zones. if your in auto mode it will cycle between heat and cold to keep the desired set temp.
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Jason & Wendy
2014 Ford F-350 Lariat 6.7L PSD
2015 Keystone Montana 3711FL
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