>The machine MUST be cooled by fresh air.
yes it is, but OUTSIDE the cooled area. that is a function of outside cooling.
iow, it is done on the roof of the trailer.
Again, we are not talking opening the fresh air vent. when you do that, you
reduce the efficiency of the inside cooling.
When you MAX cool, you are constantly recooling the already cooled air. This
can lead to stagnation of air inside but so be it.
If you have to open the outside vent to admit fresh outside air, then wait to do
so until the outside temp is less than or equal to the inside cooled area. And
yes, it is possible to be pulling super heated air from off the evap coils and
compressor. Best, simply open a couple of windows a little instead. or a roof
vent with a fan. but wait until it cools off outside. meantime, keep the AC
set on MAX or inside recirculation.
chas