greenrvgreen wrote:
The simpler answer is a third unit, if you have an available roof vent. Also, don't waste your time taking the A/C in to be checked--it works fine, I'm sure. As other have said, there is a limit to what an RV A/C can do, particularly if it is ducted.
If I was in your shoes, here would be my thought process:
#1. Are both A/C units running on compression 100% of the time? If either unit is cycling, then you have TOO MUCH A/C capacity for the volume of your unit--or you have insufficient circulation of cold air in the cabin.
#2. I would check the ducting for leaks that are pretty much guarranteed to be there. If I really felt like fiddling I would tape the ducts up, or
#3. I would disconnect one or both A/Cs from the ductwork. Let them blow cool air directly into the cabin, and use a portable fan to circulate it.
#4. I would add the third A/C, if nothing else worked. IMO, the most important thing about an A/C is that it stays on compression 100% of the time. Don't give it the opportunity to pour wet, clammy air into the cabin. If you don't need so much cooling, turn the third A/C off and make the other two run 100%, and then turn the second off, leaving the first to run 100%. In my 18-ft TT I run a 6k (6,000) btu A/C for hours on end--and I stay away from Texas.
The master bedroom AC will cycle but not the main. I question how well the front AC pushes air to the rest of the unit since it is, in essence, trying to force air back down a duct that the main unit is pushing air forward. Of course it can cause the main unit to push more air rearward, but I don't see much cold air from the front AC actually cooling the rest of the unit.
Maybe the answer is 2 13,500 in the main area that can be controlled independently during hotter weather. I'd hate to give up my fantastic fan, though. Of course the other is to be happy at 76 on a hot day.
Forgive my ignorance here. Other than removing the distribution panel below the AC unit on the interior and checking the tape in the transition from the opening to the ductwork how does one seal other parts of the duct work since it is behind the ceiling panels? Should I remove the round vent grills in each room and check the transition from the duct work to the ceiling vents too?
