I finished installing the fans on my travel trailer refrigerator. It dropped the temperature in the refrig. 10 degrees. To clarify the wiring; The fans have 3 wires. Positive, negative, and tach wire not used here. Use the connector with 2 wires. Ignore the connector containing 3 wires. I clipped the 3 wire connector but remember the 2 wires going to the 2 wire connector.(+ and -). The fan will turn in only 1 direction. Strip back the 2 wires. Test on your battery and mark the positive wire to the fan. You can either push air from the fan attached to the bottom vent or flip over the fan and pull air from the top vent. I wired a manual switch to turn the fan off when boondocking or camping in the mountains when not needed. A special thanks to Charles for an excellent idea and video. These fans really make a difference and are almost silent.
Happy Camper did you just tap the wires into the already existing fans so they all kick on when needed or did you wire it up so the fans you installed run constantly?
I'll be doing this tomorrow. Spent last week on a 100 degree beach & the fridge couldn't keep up. 50 degree beer & runny ice cream. I may as well be tent camping! Thanks Charles!
Wanted to tell you I did this to my RV. 105 at the Colorado River today. Fridge is running 14 degrees cooler than last trip. Got down to 42 last trip cooler weather only 56°. Thanks a lot
I used these exact fans. It worked fine while it worked. The fans saw very limited usage over 2 years. both went out within 24 hrs of each other. Fans went out after 15 days of camping. Though not exposed to weather, I fear that dust, humidity and temp changes may have hastened their demise. Made for an indoor computer, not for RV use. But a great idea.
Well done! You should cover the inside of the bottom vent with 3M foam air filter material (Walmart has it). It traps the larger debris particles that the fans can suck in. It filters better than screens and has low air flow resistance.
That's pretty smart Charles! You are so inventive. I would never have thought of tilting the fans. Great video, thank you! Not clear how you wired it up though. Have to figure that one out. I found a fine aluminum mesh at Home Depot as a bug screen for this vent and all the others. Cheap and beats having to pay for each vent cover. In this case, you may want to apply it to bottom of vent.
Great idea! I couldn't get my fridge below 46F . Installed two fans and it was 35 in the fridge in the morning and 38 at noon. Outside temperature is 87 with fairly high humidity. I'm in Central Texas. Soon to install a thermostat to shut the fans off when the outside temperature cools a little, (which is never where I live)
Wozza. I want to do this! Thank you for share. I need to find the detail video of how to actually connect the wires to the empty 12v slot at bottom refrigerator. Thanks again!
This is great, thank you. To be sure, you decided to use the fans to suck air out from the top, instead of fans on the bottom, pushing air up, is that right? Thx!
Great video. Got a desert trip this summer so definitely will be doing this fix. 'm still not clear on why you chose the fan direction you did. The system is set up so through convection the heat dissipates through the top vent. It would seem reversing the air flow fights that natural air flow process. All the commercially available add on fans blow in towards the cooling coils.
I'v done the same thing and I have a couple observations about your method. Get some IP rated fans. Noctura makes a couple ip67 rated fans that will be water and dust proof. Also the LEDs you have on your fans would probably be a bug attractant. Otherwise good job.
You could also get an ARP R/V Defend unit that has cooling fans for both exterior refrigerator plus fans for interior. It also monitors boiler temp and will keep your absorption refrigerator from over heating.
On my camper, the upper vent cover is screwed in place but the bottom one is hinged. I'm wondering if just opening the bottom vent cover at camp would increase the air flow without changing the fan. I do realize that your existing fan was noisy and that is why you replaced it...mine is very quiet at least for now. Great video!
But does your fan draw enough air. I had two four inch fans in mine but it still would not cool down enough. I'm in Texas and we have had over 45 straight days of 100+ temperatures. I installed these two fans and the temp inside fridge dropped dramatically. It may be worth unscrewing the top vent and install new fans.
Since my refrigerator is in my slide-out it requires a bottom and top vent. The fans are attached to the top vent and blow air out to increase the flow from bottom to top. This has worked great for years, however, I think it can be improved even further with an internal baffle at top that directs all of the air movement over the fins...stay tuned for that mod!
The fan part number is obscured by tiles of your next/other videos. Would someone please publish the part number or a link in comments? I do not see a link.
The fans have been installed in our camper for about 2 years now with no problems. The only extremes we see are heat (in Florida), and they tend to run more when the camper refrigerator is running on propane and less when running on electric.
Fan noise is masked by the background noise in the video. How does it sound in the dead silence of remote camping? How much battery current does it draw?
Couldnt tell in the video, but the air flow is in thru the side vent and out thru the roof vent. Hot air going up and out. Is that how you wired yours?
I have a trailer with the same issue and have purchased these fans after watching this video, such a good idea! The only thing I noticed and correct me if I'm wrong, but it's seems you've installed the fans to actually push air into the coil as opposed to pulling it out. Any reason for that?
Charles Coushaine got it, and thank you for replying. And more so for making this video to begin with. I'm excited to get the fans installed this weekend.
Charlie, can I simply cut the black and red wire to existing domestic fan and wire those two new fans (I purchased the same two you installed) into the red and black wires i just cut? That way I do not have to feed wires down. Also it looks like they joined the thermostat wire with the red wire somewhere between the top of fridge and bottom. This way I can leave as is. Does this sound correct? I'm not good at wiring. Great video BTW.
Does the refrigerator perform the same? Have long have you used this set up? We are aware of our loud refrigerator fan in our Eagle Cap 1165. This would be a great solution.
We did this modification to our fan set-up in Jan 2017 and it has been in constant use full time for the last 5 months and is working great! The refrigerator temperature is maintaining 36 and the freezer around 11-12F - just the same as before the modification, however, there is NO noise at all! Extremely pleased!
High Charles, I purchased this fan and have an install question. I have a positive and a negative on my existing fans. This new fan has 3 wires going into the fan and with no instructions how did you find the positive and negative and what is the 3rd for?
One wire is ground, the other goes to the fan, and the other goes to the LED's in each corner. To determine which is which, just take the fan with bare wires and touch them to any 12V battery to determine how they should be connected. Once you decide which wire goes where, I combined the fan and LED wires together to have a visual indicator of when the fan was running!
You can actually buy a temperature sensor on Amazon or Ebay it's something 1000 Google it it's about a $20 item and where you could do is put it on the top of your thing and set it and forget it runs off 12 volts also aside from doing that you can also put a solar panel on the outside of your reg and that would power just those circuits and obviously you would have to run it through your battery back also when doing so make sure you put a center zenner diode on a positive side so you do not back feed into the system it prevents current from going backwards. Awesome idea nevertheless
I have a non-slide fridge with a single intake grate and exhaust vent on the roof. If I flip the fan (pulling air in and pushing it up out the vent) Would it benefit from this mod? The only two wires are a ground and positive. That's what I would connect to, Correct? We spend time in AZ, and the temps get crazy hot. The fridge cooling really suffers. Thanks
I am not sure that would be the best way to add extra convection to your fridge. They do make multiple types of fans that can be added under your roof vent that suck air up and out the roof. That would be my suggestion for your situation. www.amazon.com/Camco-42165-Refrigerator-Solar-System/dp/B0012FEX5K/ref=sr_1_12?ie=UTF8&qid=1506861620&sr=8-12&keywords=rv+refrigerator+fan
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I finished installing the fans on my travel trailer refrigerator. It dropped the temperature in the refrig. 10 degrees.
To clarify the wiring; The fans have 3 wires. Positive, negative, and tach wire not used here. Use the connector with 2 wires.
Ignore the connector containing 3 wires. I clipped the 3 wire connector but remember the 2 wires going to the 2 wire connector.(+ and -).
The fan will turn in only 1 direction.
Strip back the 2 wires. Test on your battery and mark the positive wire to the fan.
You can either push air from the fan attached to the bottom vent or flip over the fan and pull air from the top vent.
I wired a manual switch to turn the fan off when boondocking or camping in the mountains when not needed.
A special thanks to Charles for an excellent idea and video.
These fans really make a difference and are almost silent.
Happy Camper did you just tap the wires into the already existing fans so they all kick on when needed or did you wire it up so the fans you installed run constantly?
I'll be doing this tomorrow. Spent last week on a 100 degree beach & the fridge couldn't keep up. 50 degree beer & runny ice cream. I may as well be tent camping! Thanks Charles!
Wanted to tell you I did this to my RV. 105 at the Colorado River today. Fridge is running 14 degrees cooler than last trip. Got down to 42 last trip cooler weather only 56°. Thanks a lot
I used these exact fans. It worked fine while it worked. The fans saw very limited usage over 2 years. both went out within 24 hrs of each other. Fans went out after 15 days of camping. Though not exposed to weather, I fear that dust, humidity and temp changes may have hastened their demise. Made for an indoor computer, not for RV use. But a great idea.
Well done! You should cover the inside of the bottom vent with 3M foam air filter material (Walmart has it). It traps the larger debris particles that the fans can suck in. It filters better than screens and has low air flow resistance.
That's pretty smart Charles! You are so inventive. I would never have thought of tilting the fans. Great video, thank you! Not clear how you wired it up though. Have to figure that one out.
I found a fine aluminum mesh at Home Depot as a bug screen for this vent and all the others. Cheap and beats having to pay for each vent cover. In this case, you may want to apply it to bottom of vent.
Wished you would have shown how you wired it up, nice setup other than that.
That is a winner..it will take me all day but worth it! My fan is so loud! Thank you for share! Grateful for knowledge.
Great idea! I couldn't get my fridge below 46F . Installed two fans and it was 35 in the fridge in the morning and 38 at noon. Outside temperature is 87 with fairly high humidity. I'm in Central Texas. Soon to install a thermostat to shut the fans off when the outside temperature cools a little, (which is never where I live)
Wozza. I want to do this! Thank you for share. I need to find the detail video of how to actually connect the wires to the empty 12v slot at bottom refrigerator. Thanks again!
Ditto!
Blowing air on the heat sink or blowing the air out?
Blowing air out of the vent cover
This is great, thank you. To be sure, you decided to use the fans to suck air out from the top, instead of fans on the bottom, pushing air up, is that right? Thx!
Yes, the fans blow air out of the top vent thereby sucking air in the lower vent to aid in the natural convection of the system!
How did you wire it when it came with a 3 or 4 wire connector ?
Great video. Got a desert trip this summer so definitely will be doing this fix. 'm still not clear on why you chose the fan direction you did. The system is set up so through convection the heat dissipates through the top vent. It would seem reversing the air flow fights that natural air flow process. All the commercially available add on fans blow in towards the cooling coils.
The fans I added actually blow out of the top vent cover, exactly following the natural convection!
I'v done the same thing and I have a couple observations about your method. Get some IP rated fans. Noctura makes a couple ip67 rated fans that will be water and dust proof. Also the LEDs you have on your fans would probably be a bug attractant. Otherwise good job.
perhaps a bug attractant, but the wind speed produced would make it hard for them to get passed, I would think
Just bought the same two fans for my camper. Thanks for the info
You could also get an ARP R/V Defend unit that has cooling fans for both exterior refrigerator plus fans for interior. It also monitors boiler temp and will keep your absorption refrigerator from over heating.
How did you wire the two fans together, just splice them?
Just spliced the wires together in parallel.
I've found my dometic needs forced air above 80 degrees. at 90-95 and greater it just cannot thermal syphon air sufficiently to cool.
Any idea on your new amp draw? I boondock so battery life is important
On my camper, the upper vent cover is screwed in place but the bottom one is hinged. I'm wondering if just opening the bottom vent cover at camp would increase the air flow without changing the fan. I do realize that your existing fan was noisy and that is why you replaced it...mine is very quiet at least for now. Great video!
But does your fan draw enough air. I had two four inch fans in mine but it still would not cool down enough. I'm in Texas and we have had over 45 straight days of 100+ temperatures. I installed these two fans and the temp inside fridge dropped dramatically. It may be worth unscrewing the top vent and install new fans.
Smart and excellent idea. Thank you.
I wish you had gone into a little more detail as how you wired them for power. Also are the blowing in or out?
The fans are sucking air out
I installed a 80mm fan inside the rv fridge and that helped get it cold faster. I wonder if I should install a 120mm on the outside too.
Since they're mounted to the grill only thing I'd add is a plug so you don't have to underwire them to get the grill off.
I am thinking of wiring mine thru a 3 way switch so down they will run only when stat calls for cooling and up they will run all the time.
Thank you thank you thank you for keeping it simple!
Charles, thanks for sharing. Is the point of the fans to push air out from the top grill or to push air into the back of the fridge ?
Since my refrigerator is in my slide-out it requires a bottom and top vent. The fans are attached to the top vent and blow air out to increase the flow from bottom to top. This has worked great for years, however, I think it can be improved even further with an internal baffle at top that directs all of the air movement over the fins...stay tuned for that mod!
The fan part number is obscured by tiles of your next/other videos. Would someone please publish the part number or a link in comments? I do not see a link.
There is an Amazon.com link to the fans in the description below the video.
How does it hold up with the bouncing and vibration while traveling? How about rain and weather extremes?
The fans have been installed in our camper for about 2 years now with no problems. The only extremes we see are heat (in Florida), and they tend to run more when the camper refrigerator is running on propane and less when running on electric.
Fan noise is masked by the background noise in the video.
How does it sound in the dead silence of remote camping?
How much battery current does it draw?
Installed mine. Very very quite mate.
Couldnt tell in the video, but the air flow is in thru the side vent and out thru the roof vent. Hot air going up and out. Is that how you wired yours?
I am actually going to be doing this same mod, but will be adding an on off switch. do you think an inline fuse is necessary?
without the fans, how hot does it get behind the fridge? any thoughts on doing this mod with a small independent solar panel?
Old comment but absorption fridges work by heating an ammonia liquid mix. The tubes the mix run through on the back side of the fridge get very hot.
Your inside and outside videos cover the name of the fan.Can you post the name of the fans and where you bought them?
There is a link in the description below the video to where you can buy the fans!
The fans are "Aero Cool", on Amazon.
I installed 2 200mm of these fans for my pop-up camper and my fridge runs 13 degrees cooler according to wireless temperature sensor in fridge.
Have you tried wiring it to a couple of solar panels??
I have a trailer with the same issue and have purchased these fans after watching this video, such a good idea! The only thing I noticed and correct me if I'm wrong, but it's seems you've installed the fans to actually push air into the coil as opposed to pulling it out. Any reason for that?
Justin Jimenez I actually have the fans pushing air out of the grill away from the coils
Charles Coushaine got it, and thank you for replying. And more so for making this video to begin with. I'm excited to get the fans installed this weekend.
Charlie, can I simply cut the black and red wire to existing domestic fan and wire those two new fans (I purchased the same two you installed) into the red and black wires i just cut? That way I do not have to feed wires down. Also it looks like they joined the thermostat wire with the red wire somewhere between the top of fridge and bottom. This way I can leave as is. Does this sound correct? I'm not good at wiring. Great video BTW.
Yes, that is essentially what I did as well!
Does the refrigerator perform the same? Have long have you used this set up? We are aware of our loud refrigerator fan in our Eagle Cap 1165. This would be a great solution.
We did this modification to our fan set-up in Jan 2017 and it has been in constant use full time for the last 5 months and is working great! The refrigerator temperature is maintaining 36 and the freezer around 11-12F - just the same as before the modification, however, there is NO noise at all! Extremely pleased!
Nice.
I cannot find that brand of fan. Where did you get it?
AeroCool Silent Master 200mm Blue LED Cooling Fan:
amzn.to/2pyynl4
High Charles, I purchased this fan and have an install question. I have a positive and a negative on my existing fans. This new fan has 3 wires going into the fan and with no instructions how did you find the positive and negative and what is the 3rd for?
One wire is ground, the other goes to the fan, and the other goes to the LED's in each corner. To determine which is which, just take the fan with bare wires and touch them to any 12V battery to determine how they should be connected. Once you decide which wire goes where, I combined the fan and LED wires together to have a visual indicator of when the fan was running!
This worked for me
It appears that your fans are not blowing the hot air out and are backwards. I did The same mod and the front of those fans are facing out and not in.
I assure you, my fans are blowing outwards and sucking in air from the bottom vent and out the top vent!
great job dad!
what are the part number on fans i want to get some ???
Cool, no pun intended. thanks.
You should pu5 a screen first then fans just saying great idea .
Great mod thanks, I may end up doing the same.
You can actually buy a temperature sensor on Amazon or Ebay it's something 1000 Google it it's about a $20 item and where you could do is put it on the top of your thing and set it and forget it runs off 12 volts also aside from doing that you can also put a solar panel on the outside of your reg and that would power just those circuits and obviously you would have to run it through your battery back also when doing so make sure you put a center zenner diode on a positive side so you do not back feed into the system it prevents current from going backwards. Awesome idea nevertheless
Great job!
Great fix and well presented. Don't you love zip ties?
nice job
Where did you get the fans???
Check the description for where I bought fans.
Where's your bug screen on the vent? Vents with no bug screens invite hornets
to set up homes and other bugs to enter the RV.
got it at the end video
I have a non-slide fridge with a single intake grate and exhaust vent on the roof. If I flip the fan (pulling air in and pushing it up out the vent) Would it benefit from this mod? The only two wires are a ground and positive. That's what I would connect to, Correct?
We spend time in AZ, and the temps get crazy hot. The fridge cooling really suffers. Thanks
I am not sure that would be the best way to add extra convection to your fridge. They do make multiple types of fans that can be added under your roof vent that suck air up and out the roof. That would be my suggestion for your situation.
www.amazon.com/Camco-42165-Refrigerator-Solar-System/dp/B0012FEX5K/ref=sr_1_12?ie=UTF8&qid=1506861620&sr=8-12&keywords=rv+refrigerator+fan
Please don't skip showing how and what the wires are connected to or how to connect the to a residential refrigerator.
quite and LED XD
Pooi