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09-30-2023, 02:51 PM
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#1
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Site Sponsor
Join Date: Jul 2006
Location: Sunny Beaches of Los Angeles
Posts: 3,274
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Replacement refrigerator fan?
Has anyone found a direct replacement for the fridge fan? I haven't taken it out yet, but I think it's just a PC fan. However, all the PC fans I've ever seen have mounting flanges on both sides. That won't work because then the round hose won't slip over the fan shroud.
I could just get a 4 inch fan (92mm might be the closest, about 3.6"), and then Dremel off the flange on one side, but if there's an off-the-shelf solution, I'd rather do that.
Most PC fans are also 4-wire, so I also just need to figure out which 2 are for power.
Thanks!
Dave
__________________
2000 2720SL & 2007 3124KB
2005 Toyota Sequoia
Twin Battle Born 12v 100Ah LiFePO4 (BBGC2) batteries, 300W solar on rear shell, Link 10, Lift kit, Maxxis 8008 225 75/R15 E tires
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09-30-2023, 05:55 PM
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#2
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Site Sponsor
Join Date: Jul 2006
Location: Blandford, MA
Posts: 1,048
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Dave,
I replaced my refrigerator fan back in 2015. It was available through Amazon. Unfortunately that particular item now goes to a dead end. I did find something that should work. My replacement is square and measures 92mm. This particular fan has 3 wires but I think all you might need is the black and red wires. You will know which to use when you remove the existing fan.
https://www.amazon.com/Genuine-Dell-...ts_id=11036281
Dick
__________________
Dick & Jeri in Western MA
2003 2720 SL
2007 Ford Explorer Sport Trac Limited 4x4 - V8
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09-30-2023, 06:21 PM
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#3
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Site Sponsor
Join Date: Jul 2006
Location: Sunny Beaches of Los Angeles
Posts: 3,274
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Thanks, Dick, much appreciated. I guess that means there is a square hole in the foam floor, and the hose then fits over some other auxiliary shroud, which in my case looks like a white piece of flexible plastic, which looks like it might be warped or bent. I might 3D print a new one, which will be rigid.
This project will have to wait a few weeks.....
Dave
__________________
2000 2720SL & 2007 3124KB
2005 Toyota Sequoia
Twin Battle Born 12v 100Ah LiFePO4 (BBGC2) batteries, 300W solar on rear shell, Link 10, Lift kit, Maxxis 8008 225 75/R15 E tires
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09-30-2023, 06:37 PM
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#4
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Site Team
Join Date: Feb 2003
Location: The mountains of Scottsdale, AZ, and the beaches of Maine
Posts: 10,179
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If you do a web search on something like
"3-inch computer fan square to round adapter"
you'll get a ton of hits. One of them might be helpful.
Bill
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09-30-2023, 07:26 PM
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#5
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Site Sponsor
Join Date: Jul 2006
Location: Sunny Beaches of Los Angeles
Posts: 3,274
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Thanks, Bill, I like it! That's kinda what I was thinking of printing, too.
Dave
__________________
2000 2720SL & 2007 3124KB
2005 Toyota Sequoia
Twin Battle Born 12v 100Ah LiFePO4 (BBGC2) batteries, 300W solar on rear shell, Link 10, Lift kit, Maxxis 8008 225 75/R15 E tires
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10-01-2023, 08:35 AM
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#6
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TrailManor Master
Join Date: Aug 2015
Location: Rochester, NY
Posts: 1,891
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I’m pretty sure the flange that screws to the floor is just a standard issue dryer vent wall plate from Home Depot or Lowes or Amazon.
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2007/21 TM 3326 (Pride of the Fleet)
2000 2720SL (Rebuild Project)
2002 2619 (Parts TM)
SMARTER THAN GOOGLE!
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10-01-2023, 03:00 PM
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#7
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Site Sponsor
Join Date: Jul 2006
Location: Blandford, MA
Posts: 1,048
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Dave,
I found the pics from my refrigerator fan replacement. My TM has a square hole cut into the Styrofoam to accommodate the PC fan.
Dick
__________________
Dick & Jeri in Western MA
2003 2720 SL
2007 Ford Explorer Sport Trac Limited 4x4 - V8
Albums
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10-01-2023, 06:19 PM
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#8
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Site Sponsor
Join Date: Jul 2006
Location: Sunny Beaches of Los Angeles
Posts: 3,274
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Thanks, Dick and Shane. I decided to dive in last night to at least see what I was working with, and of course saw exactly what you saw, Dick. It's a 120mm fan. I'm thinking of using one of those "fan to dryer vent" adapter things and either mounting the assembly to the floor, which will raise the fan several inches, or keep the fan where it is but then lower where the hose mounts into the floor cavity.
I just don't see it being effective in its current setup. First of all, the flange was not sealed to the floor, so much of the air was likely being pulled in from the between the flange and the floor, not the top of the fridge. Doing what I'm suggesting may not make it any better, but it seems worth a shot.
I may also put a stronger fan in there.....the OEM one only pulled a few hundred milliamps, but there are some the same size that pull a few amps, moving quite a bit more air (like https://www.amazon.com/HIGHFINE-4000...dp/B01LLYQ2VE/).
Dave
__________________
2000 2720SL & 2007 3124KB
2005 Toyota Sequoia
Twin Battle Born 12v 100Ah LiFePO4 (BBGC2) batteries, 300W solar on rear shell, Link 10, Lift kit, Maxxis 8008 225 75/R15 E tires
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10-10-2023, 02:46 PM
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#9
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Member
Join Date: Nov 2020
Posts: 39
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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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10-11-2023, 05:52 PM
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#10
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yes, they hunt lions.
Join Date: Aug 2005
Location: Reno, NV
Posts: 1,360
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Lars is correct (in both comments)
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.
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TM='06 2619 w/5K axle, 15" Maxxis "E" tires. Plumbing protector. 800 watts solar. 600AH LiFePO4 batteries, 3500 watt inverter. CR-1110 E-F/S fridge (compressor).
TV = 2007 4runner sport, with a 36 volt "power boost".
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