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Have similar problem as Jeff Shaw. Not sure what model # but is analog unit. Placing switch on AUTO if you turn AC on the unit will not kick on until you lower the thermostat to 50 or below, even if temp in RV is very warm. It will then cycle and start to cool, coming on/off a minute or so at a time. Return thermostat to a reasonable temp and it will not cycle or come on at all. If you lower the thermostat to its lowest setting, AC will come on and stay on cooling full blast. Fan switch works OK, but no cooling. Haven't tried furnace due to warm weather, but worked fine in spring. AC also worked fine earlier in spring. Any suggestions?
Make sure the thermostat is mounted in a level position and the rv is level. If it got hit and it is not in a level position, it will not work correctly.