Another Frig Fan Question

[Sgeorge]

I want to put a frig fan in my vent stack on the roof of my trailer. I have a 10 volt solar panel mounted on the roof next to the vent. I will use the solar panel to power the fan, it obviously will run when the sun is hitting it and not run at night.

Question - Is there any problem with a fan running all day that is not controlled by a thermostate. Or in another way, does the fan need to cycle on and off according to the temperature in the vent stack. What problems might the frig have with this installation?

[JimBollman]

I don't see anything wrong running when it isn't needed but by installing it in the stack, it will cause some obstruction when it isn't running, so hot nights might be a problem. You may want to add a switched battery assist for those few times that you may needed it.

[Old-Biscuit]

Fans are installed in outside compartment to increase air flow on hot days.
As outside temps warm up the air can not absorb as much heat from fridge cooling coils......the fans increase the amount of air flowing across coils in order to increase the heat transfer.

Vice Versa...they shut down when temps drop because they are not needed and increasing cool air flow can result in lower temps..temps low enough to cause food section to over cool enough to freeze items .

Going to the trouble of installing the fans (which really aren't necessary with a roof top vented fridge......natural draft vs sided vented fridge in a slide-out-----stalled draft) might as well install a snap-disc t-stat.......ON at 100*F and OFF at 80*F
Here is one from another post........LINK

[2oldman]

no problem