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Topic: Refrigerator Fans (Read 1342 times) previous topic - next topic

Re: Refrigerator Fans

Reply #25
I am sure fans can be wired to both come on when door is opened and also to stay on full time.. Assumption is full time would help cool with mixing the air and also keeping the fins from building up..Part time air movement wouldnt do much when the door is opened unless it was on for a few after the door was shut..Circulates the hot air with a more even cooling throughout

Re: Refrigerator Fans

Reply #26
Confused... fans come on when door is open? My are on all the time..
They should be on all the time, with an on/off switch. Used to keep ice buildup off the fins. I use one that cost 7 bucks and it works great.
1994 U280, Build 4490
Deming, NM.

Re: Refrigerator Fans

Reply #27
I hung a muffin fan on the front of the fins using a long ty-wrap and wired it to the light supply.  It runs continuously. Before the fins were constantly covered with a thick layer of frosty ice.  Now they stay clean and the fridge temperature stays constant.  It's in a covered building at 96º and is 33º inside running on electric.  Easy upgrade to fridge.
Forest & Cindy Olivier
1987 log cabin
2011 Roadtrek C210P
no longer 1999 36' U320 build #5522
2013 Rzr 570 & 2018 Ranger XP1000
2006 Lexus GX470
2011 Tahoe LT 4x4
Previous 1998 45' 2 slide Newell, 1993 39' Newell

Re: Refrigerator Fans

Reply #28
Mike,

Those fans boost air flow over the condenser and therefore help with cooling.

Particularly helpful when cooling in marginal:  High ambient temperatures, sun shining on that side, someone going into the refrigerator frequently, etc.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Refrigerator Fans

Reply #29
Particularly helpful when cooling in marginal:  High ambient temperatures, sun shining on that side, someone going into the refrigerator frequently.
Thanks, Brett. That sentence describes us perfectly, especially the last line; I DO like my Pacifico cold!  ^.^d
1993 U-240 "La Villa Grande"..CAT 3116 w/ Pacbrake PRXB...Allison 3060 6-speed..
Previous: 1983 Airstream 310 turbo diesel, 1979 Airstream 280 turbo diesel
                                      Build # 4297
                                      PNW natives
                      Home base:  'Cactus Hug' (Ajo, Arizona)
                        DW Judy & Chet the wonder dog
                        Full-Timers 'Sailing the asphalt sea'

Re: Refrigerator Fans

Reply #30
The condensor fan(s) should come on and stay on once the thermal switch turns them on, which is shortly after the fridge is powered up and running.  I have on/off switches so I can run one or both of mine.  I normally only run one and turn the second one on when it's extremely hot.

Re: Refrigerator Fans

Reply #31
Since all condenser fans were installed after leaving the factory, there are likely a number of ways they could be wired.

I know on Mike's U240 they are on a switch above the sink-- no thermo switch.  Most KISS theory I would do.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Refrigerator Fans

Reply #32
If one gets the 12v fan power source from switched side of door light switch, power is turned off when door is closed. Not a good place for power.

Door switch has a constant 12v on the 'other' side of door light switch, which should be used to power fans.

Always consider several inexpensive flat 'muffin' computer fans, with several (many) across the fins, blowing on to the fins. Fans can be held on place with office binder clips. Use thin cable ties to keep fans together and to binder clip.

 

Re: Refrigerator Fans

Reply #33
My fan does not blow directly on the fins. Since cold air sinks and hot air rises, I attached the fan to the underside of the top wire shelf and it draws the cold air up. Fins never ice.
1994 U280, Build 4490
Deming, NM.