RV Repair: RV reppair - Duo Therm Air conditioner, duo therm air conditioner, fan mode

Question
My Duo Therm air conditioner won't turn on, the thermostat controls the heater just fine but the air con only causes a relay to click, no motor action happens. Fan will not run in fan mode either. I replaced the control box thinking that was it, no change. Next?

Answer
Gene, This may sound stupid but if you changed the box and it is still not working the first thing I would do is turn the fan motor to make sure it is not just stuck. These do this on the newer ones and nothing works then. Let me know if this is it and if not we can go from there. Thanks, Bill