Achieving Proper Air Flow Behind Your RV Refrigerator For Better Performance
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- Опубликовано: 6 сен 2019
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Certified Mobile RV Technician, Darren Koepp, shows you how to achieve proper air flow behind your RV refrigerator for better cooling performance.
If you are in need of RV Repairs in the Olympic Peninsula area of Washington state, submit a service request on our website at myrvworks.com today!
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Topic: Achieving Proper Air Flow Behind Your RV Refrigerator For Better Performance
Parts:
Refrigerator Roof Vent Cover - amzn.to/2QbXRVb
Refrigerator Vent Base - amzn.to/2QacuIz
Shop Supplies:
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PPE:
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Related Video's:
Replacing And Resealing RV Roof Vents: • Replacing And Resealin...
Refrigerator Playlist: • RV Refrigerator Repairs
Film Date: 8/22/2019
Location: Port Angeles , WA
Camera:
Samsung Galaxy Note8
Native Camera
16:9 FHD 1920x1080
Version 9.0.01.38
Music:
"My RV Works-Jam"
Composed by Steve Patry - Four Faces Band
Have owned my camper 22 years.(1995 layton with dometic 2611 refrig) Have tried SEVERAL things to improve performance. Nothing made much difference until this chimney change. Dramatic improvement. There were several large pockets to hold hot air around and over back of frig. First time I have been happy with performance. This REALLY WORKED for me! Thank you very much for video. I also added 2 small vent fans with on/off switch which rarely come on unless it's over 80 degrees F outside. Thanks again.
Unfortunately RV manufactures are just like all other manufactures these days building things that only last so long. Remember when a house hold refrigerator,washer,dryer,etc seemed to run forever 20-25 years. Now days consider yourself lucky if they last 10 years. The manufactures goal is when things start to go south on you (especially after the warranty runs out) is for you to return for repair or better yet sell you a brand new RV. I'm glad we have people like in this video that has the heart to show us the flaws of a RV and how to fix the problem. I'm currently cleaning and replacing certain items on our 2000 Fleetwood Prowler 26T model that has not seen the pavement in at least 12 years. My RV is still in very good condition and I'll give credit to the 20x30 awning that houses it from the death ray of the Sun. I live off a main street and have had several people stop by wanting to know if that travel trailer might be for sale, I'll say no I can't replace it considering the ridiculous prices on new RV's these day's. One lady was not going to take no for a answer here a couple years ago saying everything has a price, so I said ok $12,000 and it's yours, that's what I paid for it new. She calmly left the scene, I'm glad she didn't take me up on the price because as I said I could not replace it .
Are there any videos on how to install fans with thermostat On the back of refrigerator?
An awesome teacher you are. You are the best.
sweet a new video. Thanks Darren
Well done video again Darren, thanks for all you do and show!
Nice video! Good job. Thank you
Great video, great information! One small caveat; the flashing / baffle above the refrigerator should not be screwed to the unit, as that creates more work than needed, should the unit need to be removed again, meaning one will have to go the all the nastiness of removing it the top vent and screen in order to unscrew them. A possibility better attachment might be flex seal or caulk. The screws along the top are fine, but I'd avoid driving them into the unit in that location. Thanks for all you do!
Good information and right to the point!
Great Info!
Darren, these videos are some of the best out there!! Thank you!
Valuable info especially in the southwest deserts. Thank You and guess what I will be checking tomorrow.
Another awesome video. Thank you.
Love your videos, learning so much.
Thank you. I will do my homework on whatever RV I wind up buying. Your videos are really helping me prepare for the RV my wife and I will wind up buying. I don’t want to buy junk, so I’m looking for stuff you see during your service calls, and these videos about proper maintenance are a real help. Thank you.
As usual- GREAT JOB!
Great video as usual. Thank you for your time and expertise. Bless you for all you teach.
Exactly the info I needed !
Thanks for caring and sharing. I see you filled the one void with insulation, but why didn't you fill the big void behind the boards you put in? Wouldn't the lower screw you said went in the refrigerator cause any damage? Thanks
We just purchased a 1982 Tioga RV and expect to do a bunch of remodeling and your videos are very informative and easy to follow. thanks.
Thank you for answering things that nobody addresses. I'm putting in a fan kit on top of the condenser fin set and was planning on filling the void just like what you're doing. Perfect answer! Great 👍
Enjoyed the video. Subbed.
Yet another informative video! The raw footage is needed for videos like this because we actually see what is going on. While this video doesn’t apply to me since we have a residential Samsung it may in the future or it may assist in helping someone. Thanks so much for posting helpful videos! Keep up the good work
Having issues with mine.. Thank you... Thank you..
My 2016 Pleasure Way XLTD has a Dometic RML 8330 that wasn't getting very cold. After watching your other videos I found the burner too rusted to clean (even a soft bottle brush broke the burner tube slots!) and so I have a replacement coming. In the meantime I watched your videos on how these things work, climbed up on a ladder and checked behind the top vent cover. Happy to say PW isn't nearly as bad as your examples! The back could be closer but at least is sealed and angled for less turbulence. Air rising up the front however mostly bypasses the cooling fins and goes right out the vent. I have the sheet metal and other materials, so tomorrow I will fashion a really nice duct to get all that air flowing smoothly across the condenser heat sink fins. Thanks!
Subscribed, gave thumbs up, because down here in Florida, your videos are helping my RV become more efficient! Thank you so very much for sharing your expertise!
You the man
Awesome Video!!!!
Thx for sharing!!
Thanks for the tips appreciated
Brilliant! Thank You
I have the same thing and I didn’t add the wood when I was adding a fan in that area. The fridge started working great after I did add the fans. I think I’m going to add the wood now. Thanks! Semper Fi !
Semper Fi! Low drag is the goal here. We want to channel the heat properly. Air is lazy (like some other... oh never mind... You know what I mean LOL) and needs to be lead where we want it go. No short cuts.
thx u for all ur expertise!
From all of us out here, THANK YOU SO MUCH FOR SHARING YOUR VALUABLE INFORMATION!!!
Excellent video! Very informative, as all your videos are. Time to get back on the roof.
Good info on video.
I will be replacing my cover and am glad I found this video, I will definitely look inside before covering up the hole!😃👍
Thank you so much. Very informational and you explain well. Good job, can't wait for it to stop raining here so I can go up and check.
Love the few videos that I've watched and will be watching a lot more, now that I have a Class C. My question is will a vent fan at the top of that chimney and one at the lower door, make the fridge perform even better?
Love the Ford F-350 Dually! and really enjoyed this video. Liked and subscribed
Love the video once again Darren. Keep them coming. Is there a target delta T for the refrigeration? Thanks for all you do.
The absorption refrigerator leaves the factory set to maintain 0°F in the freezer and 37-40°F in the fresh food (FF) compartment. FF is 'wet' temp so check it in a cup of water that has been in there for several hours. It maintains this temp with water, ammonia, sodium chromate, hydrogen, heat and pressure. By ∆T I am wondering if you are referring to R-value. I am not sure what the R-Value is for a typical RV refrigerator but I know that adding more insulation around it and having a fan properly placed on the back side to help scrub heat from the coils will only hep it perform better.
Super good engineering buddy.
Mine has a huge void with zero baffle on top of the fridge. I have substantial issues keeping the fridge at safe cool temps in the summer. Called Dometic and they say the same as you, manufacturers don't read the instructions. Building the baffle box now and expect to see a big difference. Thanks for this video. I took away some great ideas to use on my install. Cheers.
Definitely!
Great video. I would have never thought that. I’d a just thought that was good space to put some exhaust fans pushing the air up. Never thought of turbulence and how that affects the flow.
I hate to report that I see this more often than not. And I'm also the one called in because people's refrigerators are not working. So yes, we need to make this an absolute chimney with no shortcuts.
thanks for the info, I actually did same but didnt know about the 1 inch etc. So I re did mine. except I had an old truck mud flap which was stiff I used for the bottom instead of screwing it in and halods up and in place no issue
Thanks so much for your video it's awesome help 😀😀 from Australia with a keystone Montana 5th wheeler from USA
I have subscribed after watching a couple of your videos. A 2005 Keystone Cougar TT we just bought has the exact same faults you just pointed out. One of your earlier videos pointed out the gap at the end wall-to-upper fins and mine was about 3.5”. I made a metal V shaped piece that closed that to 1/4”. Tomorrow I will duplicate the luan panel partition like you just demonstrated. I’ve ordered a new roof vent as some dork screwed the original down so it almost completely closed the air flow. In the meantime I’m creating the flue you have described. Thanks for the great videos!
I've been dealing with this issue in our Class C because we live in Az. so if the sun is directly on the fridge side it is tough to keep it cooling. Our old 5th Wheel used to have bigger issues with this problem. I will be making these improvements and hopefully it improves the efficiency of the unit. Thank you!
I found out a better way by putting intake fans below and fans up top to pull the heat up and out.😉
We have a 2016 rockwood 5th wheel that we use not a hole lot but evertime we use it in july aug sept it has problems cooling i was concidering a fan but going to try this first thanks
We were having trouble with our Norcold refrigerator when the outside temp is over 80 degrees. Its a single door N8XC on a 2019 Outdoors RV 22FQS. It vents through the roof. When I started to research the issue I came across your amazing channel. I did your homework assignment and sure enough the top of the refer has a space behind it. Not quite as large as the one in you are working on here, but enough to trap a lot of hot air and destroy the chimney effect. I packed the void with fiberglass insulation and used aluminum flashing to cover it. There is also about 1.5 inches on each side of the refer and I added some flashing there too to aid the airflow. I was only able to go down a about 1 foot from the roof down the sides, but it is now smooth and tapers to the top vent opening. I foil taped the joints to finish them all smoothly. While I was up there I installed a Titan 120mm dual fan setup as well just to assure hot weather performance. I turned on the refer when done and it was 92 degrees initially inside. Within 3 hours it was 7 degrees in the freezer and 35 in the fridge. And get this, I only set the level of cooling to one star! I used to set it at 4 or 5 stars, and the refer would be 50 degrees in the afternoon! The difference is simply amazing. I think covering the top of the freezer with insulation made a huge difference as all that hot air was pooling up there making the roof of the freezer inside way too warm, but I think the proper chimney is simply the biggest performance enhancer. I say that because today I turned off the fans and the refer is still very cold even with the temp in the low 90's and the refer grill in the direct sun. All I can say is thank you and WOW what an improvement! I have 2 questions that arose from my observations after doing this. The first is the burner seems to run much hotter with the excellent airflow. I think it may have been starved for oxygen before, and now it is really hot. I could put my hand on the chimney before, and nearly burned myself on it after the changes. Would these improvements increase burner performance? Second question is the roof vent cover looks like it doesn't allow the air to escape easily. I know they are designed to get the hot air out and keep water from entering, but it seems to stifle air flow. Do roof vents vary in air flow, and if so which brand is the best in your opinion? I hope you can answer, and once again, thanks so much for your invaluable help on this. Its simply great what you do for us do-it-yourselfers that want to know how to make our RV's perform optimally in all circumstances.
Did you put titan on INTAKE (side of rig) or on ROOF exhaust?
In the roof exhaust vent. Mounted directly over the coils if possible.
Very informative love the care you take wish I could use you. Manufacture are very bad, they want get them out and sold. They will pay warranty for year but if use three times year it over before find thing. Keep up good work.
Wow! You are amazing Thank you! Very helpful. I watched your refrigerator/air conditioner videos today. I just came across you today and will subscribe. Mama needs all the help she can get.
Thanks for the video.
Where did you get the Mate that you are kneeling on ?
I put a link to all my tools in the video description. If you buy from my link Amazon pays me 5%!!! WooHoo...
Here is the link directly: amzn.to/2OdD2q5
Thanks did you have a video on installing a fan setup? Also did you add any insulation down the sides of fridge
I will add a frig fan install to my list of video's to make. The frig already had insulation down the sides but I did add it to the top sections to channel the heat where I wanted it to go.
I like the video. Well done and good advice. My new 5th wheel does have the fridge in a slide out and it is on the South side so it gets very hot. Would love some help on how to improve it. I has a thermostatically controlled fan that has a irritating squeal. Maybe it wouldn't have to run so much if I could improve the airflow
Sounds like you should change the fan. If it's squealing it's not working full potential
Well done👍
Yep if you don't let the air draft...it won't.
hi
Voids/ empty spaces create turbulent hot spots ,which can 1/ heat fridge casing 2/ block ventilation airflow
**** Hot Air from burner must be ducted out typically side wall exit --allowances might have to made for this .
Upper air vent in wall or roof must be ducted straight to condenser . Therefore all rising air passes over mechanicals and then exits over condenser fins . Done this way achieves max fridge performance .
When you screwed in the lower screws for the baffle, what did you screw into? I have a void similar to that and want to fix it. Thanks for all the great videos.
I watched many of fridge videos and I don't have an rv. But when I do next year, my rv fridge will check all those marks.
Hi I have a brand new camper . If I cant put boards in if needed would fans still help out greatly. Put 1 on bottom and 2 on top. Where can I buy a thermostat to turn on and off my fans. What temp for top and bottom. Thank you for this great information.
This is exactly what I found on my Gulfstream MH except the builder used adhesive foil to close off the open space which over time came unglued and completely blocked the air flow through the condenser!
🙋thx
Thank you so much for all that information this is Mark Strand from Fall City Washington just on the other side of Elliott Bay from you guys or close to you Thank you God bless
Ive just replaced my roof. I'm hesitant to willingly put a hole in it for the refrigerator vent. Is there an alternative for a wall vent you might have used/seen?
Those are the most awesome knee pads I have ever seen.
What is your opinion on driving with LP on to refrigerator? And what are your thoughts on Camco refrigerator with solar cap with small fan? Great video by the way.
Driving with refrigerator on is perfectly acceptable. The manual states this clearly. The movement of the RV will help circulate the liquid/gas components. There may be DOT requirements that will have you turn off the LP (tunnel for example) but run with confidence in LP mode and get on down the road.
I installed a Camco solar fan on my frig when we were in Texas and worked great. The fan is a bit noisy so be advised. Since we moved to Washington I disconnected it to not have the noise.
@@MyRVWorks thanks for responding. I really enjoy your videos. Keep up the good work
Can the refrigerator chimney intake vent be on the inside of the rv rather through the outside to maintain the stealth qualities of the camper?
I wish you showed how to install that (aftermarket?) vent cover on too. I feel mine is a bit too tight for air to get in and out.
You make great videos. I constantly see on Facebook Toyhauler Groups- folks complaining about fridge in slider not cooling properly. If you could do video on this explaining proper chimney airflow is critical for good air flow. Many folks don't understand. Mine had no baffles installed to help air flow, dead air space above and sides. I insulated, HVAC taped and thin plywood added at top to direct air out top vent in slider. Mine works well now but sorry to say many manufacturers don't install like they are supposed.
Hi Jeff C. Thanks for watching! Have you discovered our Refrigerator Playlist? We have covered many topics on refrigerators and have more we are working on. To address your specific concern check out this one. I linked you right to the 16:15 mark where Darren draws out the correct airflow and discusses the challenges with slide room installations: ruclips.net/video/IT_5HGe4q-k/видео.html
Cheers,
My RV Works Media Team.
@@MyRVWorks Thank you guys ;-)
Thanks! My brother in arms. I'm going to try putting aluminum foam board in there and the fans, maybe. Are the foam boards safe? Recon 80-84. Semper Fi.
Yes they are! I use those to build up the space between the wall and cooling unit... Semper Fi!
Great job! My Norcold fridge gets warm when is hot outside but it works when it's cooler outside. I checked the top air vent (not a slide out) and the baffle is blocking (almost completely) the vent hole. I can't see anything but the wood board. Should I remove it and re-install so I can down the back of the fridge?
Thank you!
What's your feelings on a power (fan) vented Exhaust cover? As she a lot of people/videos where they're forcing The exhaust through the chimney By use of a fan. Seems like an easy enough fix. But you Sir are The experience expert in RV Refrigerators. Thanks for the videos with your help I was able to fix my refrigerator In my Majestic
The key is to shed the heat off of that cooling unit. But the most important part of that statement is to make sure that your chimney and baffling is set correct. Moving the air up the back side of the cooling unit is not the same as moving air through the condenser fin. The focus should be the condenser fins.
So I went and checked, oh my God you are absolutely correct there's nothing but Air, exactly the same as your video. What are your feelings on foam with the metal heat shield?
I used the insulating foam boards with aluminum tape today. Worked fine. Made sure to stay AWAY from hot stuff. No changes yet. 108 outside.
Wondering what material he screwed the boards into at the fridge edge side - foam?
Helpful & informative info as I'm about to take delivery on a new TT! BUT as a retired HVAC service tech🤔 I'm equally interested in those knee pads of yours! Who, what, when, where??😉
LOL, yes, they are extremely comfortable. I've put a link below the description for all my tools Etc. You can get them on Amazon through my Amazon affiliate link and I'll get my 5% from Amazon. Happy shopping. I appreciate you thanks for watching.
Hi I forgot one thing . How big of fans can I use. 120mm or 140mm up top. How big in the side
Air flow and 'levelness' of the fridge as sitting in the RV chassis are the two critical issues of RV fridge operation, correct? And the more critical of the leveling axis for the fridge is 'left and right' as you look at the fridge from the front, correct? That's where the path of the heat exchanging chemistry flows down it's zigzag circulation tubing. If it's not so level from 'front to back' as you look at the fridge, it would probably be less of an issue since the downflow of the zigzag tubing wouldn't be very affected, right?
How much of a difference did this mod make. I am having trouble keeping my fridge cool above 90 deg
Bet this what is going on with my daughter's rv fridgerator ex son inlaw replaced fridgerator with a used one never would cool below 50 degrees
So these systems apparently don't come with any kind of circulation fan inside, just rely on convection??
I'm just wondering I'm building a bus. This is great information for me. However, driving down the road. Is there any air that Can Enter through that top vent. Because mine does just wonder if I should put a baffle or something in front of the vent.
Question? Does my propane tv fridge heat up my tv inside temperature? I’ve heard it does and doesn’t. I feel my fridge is venting properly but maybe not insulated properly like in this video. It’s a 2006 Keystone Everest
Is this a condensor, residential fridge or an RV fridge? Does the same apply for residential?
This is an absorption refrigerator typically found in RVs. It's a kind that can work on LP flame or an electric heating element. Very, very different from a residential refrigerator that has a compressor. This absorption refrigerator has no moving parts and is more a chemistry set. It is critical on these units that the back 'chimney' is able to scrub off the heat from the coils and condenser. For a residential refrigerator, it doesn't matter because they use a compressor to get the job done - much like an air conditioner.
@@MyRVWorks I recently replaced the RV fridge in my 1999 Tioga with a residential fridge. Do you have any tips or tricks on how to keep this running smoothly and chilly?
Can i use foam foil board for this application?
What temperatures typically come off the refrigerator? I ask because you are using wood.
With that wooden baffel screwed to the back of the refrigerator how do you slide out the refrigerator if you need to.
Hi Darrin I have watched a few of your videos going to attempt the bagel when I get home
the problem I’m having is the freezer is -10 top of fridge 38 and the bottom is at 47 I have replaced the thermister added a small fan behind the fridge to blow more air when I put a dollar bill to ck the seals it all feel snug
Oh an have a fan on the inside of the fridge
So I’m not sure why the such a difference in temp from top to bottom
It’s a dometic dm2852 3 yrs old
Any help would be great
what if there is no vents around the frig?
Hey don't forget the computer fan to make it even more better 😃
Be sure to check out my Refrigerator Playlist for even more tips/tricks and repair walk-throughs here: ruclips.net/p/PLk44vSl27TRBtE1CmMkPb02ayS5H1sKbB
What is the possibility of that repair caching on fire
Did these work lower the refer temp and if so by hw much?
Well proper airflow up the back side to scrub the heat off the cooling unit is the wav systems work. How much it will affect is a function of the insulation value of the refrigerator box itself. If that back wall is in direct sunlight, and it is very hot, then everything maybe right with the installation but there's just not enough insulation on that refrigerator box itself to keep it cool. It would be no different if we had an ice chest and we left that ice chest in direct sunlight on a hot day. The more efficient and proper and slippery that air is moved through the back side of the cooling unit to scrub heat the more efficient the refrigerator will cool the inside.
GREAT VIDEO!! One question though, do you have to worry about insulation touching any of the piping and fins in the back of the refrigerator? I would be afraid they may start a fire. Thank you in advance for your answer.
I have a 2012 reyo, with a Dometic 8555 fridge. It works great with 120v, maintains on 12v, but doesn't work on gas. If it works ok on 120v, is it posible, to be out of ammonia mixture? I've watched many videos, none ever mention that. I've followed other of your videos, have trouble shot mine, it has proper gas, the burner ignites, but it never even starts to cool. My unit already has a fan installed. Don't know how to test, the fan, either. Can you help me ck further?
Hi, I have watched many of your videos. I don’t see you mounting any fans to cool refrigerator compartment outside. I have made an appointment with you to install fans in the outside compartment to cool my refrigerator. I hope I’m not making a mistake. My refrigerator does not cool very well. the freezer does not get below 10°. Most the time it’s in the 20s. Refrigerator stays between 40 and 50°. The propane seems to work well I have a good flame it doesn’t seem to make any difference whether I’m plugged in or not. My question is when would you install a fan?
The issue with refrigerator cooling performance has everything to do with the ventilation of the backside of the cooling unit. The specification is 0" on either side, less than 1" to the back wall, and depending on if your refrigerator is in a slide room or if it vents straight out the top, we must verify that the air flows through that top condenser Fin and does not take any shortcuts. So before we look at adding fans we first must verify that the chimney on the back side of the refrigerator is to specification. If it is not, then fans are not going to help. Having said that, if your refrigerator is in a slide out then fans are mandatory. One common issue we see with refrigerators and slideouts is that they did not create the proper baffle to force the air through the condenser fan before it exits out the top vent. In this video I create a drawing on a grease board where I explain this a little bit more.
ruclips.net/video/IT_5HGe4q-k/видео.html
@@MyRVWorks
Thank you for getting back to me. My refrigerator does have the top and bottom vents on the side of the van. If I understand your video correctly, I do need fans inside that compartment I was that scheduled my appointment with your staff to have them installed. Thank you so much.
What about beechlane fans?
Replaced my roof vent with that generic "universal" Camco vent cover and it caused my fridge to overheat...would not recommend it.
So the Camco restricts airflow? Did you find a better one?
Wow! I just subscribed to your channel just because you are sooooo handsome....;-) Thanks for all the amazing videos.
I love watching you work on RVs good looking man....lol
Marty,
So how did you pre-drill and installed that lower screw?...what tools did you use?...telling us about it and not showing what u did on that screw is useless....
More than likely I would have used a right angle drill bit adapter. On our Amazon store you can find these tools and many more like them Under The Tool accessories section here:
www.amazon.com/shop/myrvworksinc?ref_=cm_sw_r_apann_aipsfshop_aipsfmyrvworksinc_XC75592G7YDWV382ZPK4
We've also done videos on tools that are carried in an RV text tool bag. And on our Patreon channel will be coming out with a video showing our service trailer.
Wait, you mean I don't NEED these 4 Noisy ASS high speed computer case fans anymore?? ;-) I thank you, my neighbors thank you, and the folks in the next county thank you!!
Couldn't you have just filled the space on top of the fridge with insulation????
Anything would have been better than what it was. But I want to make the air have the least resistance as it slips through the cooling unit and out the roof.
They build these RVs in 4 hours so yeah... there will be stuff like this.