I have an '86 Westy with the original Dometic Frig.  It is cooling on either
gas or 110AC - with maybe a slight advantage on the AC.  But it is just
border-line on keeping the interior below 40 degf.  What should it be able
to do?  Can it get below 40 degf if its 80 degf outside?  How about 90 degf?

Deke