Dometic AC Performance
For background, I am using my father's 2004 Sunnybrook Titan 28RLKS (three pop-outs) 5th wheel trailer after replacing tires and batteries. It was purchased used in about 2009 or 2010 with little use...
Forum Discussion
With one 13.5 AC trying to cool about a 30 foot 5th wheel with 3 slide outs, I would not expect it to go from the high 80s to the high 70s in an hour. If the AC is blowing cold it may or may not have a problem. If I were you I would go to auto supply (got mine at Auto Zone) or harbor fright and get an infrared thermometer (cost about $20 to $30). Shoot the beam to the AC intake and get the temp of the air going into the AC. Then shoot the beam into the main AC output vent and get the temp. If the main AC output vent is about 18 to 20 degrees colder than your input, your AC is working fine. You then need to see what you can do to help the AC. Things such as insulated pads in the roof vents and closing all window shades or even buying foil insulated window coverings. Good luck.
