Quote:
Originally Posted by larsdennert
Doesn't the fan suck out? Seems smarter than blowing combustion air into all the nooks and crannys of the trailer. Better to draw fresh air from all around and vacuum up the combustion air. That's how all residential fans work and for very good reason.
Some fans have a third signal wire to let the computer know the rpm or if it is jammed. Yellow I think and not need in this case.
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Yes - the fan must be pointed to blow outwards (into the ground from the floor. The flex tubing must also be in place, and NOT CRUSHED, in order to pull hot exhaust air down from the upper portion of the condenser assembly.
But the fan should be necessary when the shell s are down for travel. When the shells are up (in camp), the upper exterior vent allows hot air to exit without fan assistance - including combustion by-products in the case of running the fridge on propane.
While traveling, the fridge should be run of 12v electrical power, without such "combustion by products". But the heat build up in the top rear of the fridge is too much with the upper vent covered by the lowered shel, and then fan should be turned on to pull that heat away.