Forum Discussion
dougrainer
Jul 17, 2018Nomad
What happens if you choose HI/COOL? Does the unit then run and cool correctly? It will shut the compressor OFF in this mode when it reaches the cool set temp. If HI/COOL is not acceptable, use LOW/COOL. The way Dometics run can be upsetting if not used to this new models and controls
IF on AUTO/COOL, the unit will go to HI/COOL. I don't have my manual at home, but I believe the change fan speed is 4 to 5 degrees to set point. That means it runs on HI, as it reaches that 4 to 5 degrees the FAN will shut down for 1 second or 2 . THEN start back on LOW. The compressor will stay running. Once the AC reaches set temp, the Fan will shut down and a few seconds later the compressor will shut off. IF you have a problem with where the wall tstat is mounted, like a duct louver is blowing on the tstat, the system may short cycle. Also, the position and mounting of the freeze thermistor is a must. If the AC is NOT mounted correctly, like the baffles and air box is NOT sealed correctly, you will get oddball running like what you experience. Are you on 50 amp service? Can you get a digital 120 voltage reading from a wall receptacle when BOTH AC's are running? Doug
IF on AUTO/COOL, the unit will go to HI/COOL. I don't have my manual at home, but I believe the change fan speed is 4 to 5 degrees to set point. That means it runs on HI, as it reaches that 4 to 5 degrees the FAN will shut down for 1 second or 2 . THEN start back on LOW. The compressor will stay running. Once the AC reaches set temp, the Fan will shut down and a few seconds later the compressor will shut off. IF you have a problem with where the wall tstat is mounted, like a duct louver is blowing on the tstat, the system may short cycle. Also, the position and mounting of the freeze thermistor is a must. If the AC is NOT mounted correctly, like the baffles and air box is NOT sealed correctly, you will get oddball running like what you experience. Are you on 50 amp service? Can you get a digital 120 voltage reading from a wall receptacle when BOTH AC's are running? Doug
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