Dometic RM8551 insuffucent cooling - Page 15 - Escape Trailer Owners Community

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Old 07-01-2015, 03:41 PM   #141
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Quote:
Originally Posted by Patandlinda View Post
Ahead of you Rich bought a Penquin cooler a year ago a little cheaper but made real well . After done with this fixing need to drag along . In the 19 , 2 people and 3 dogs got to find a place . Don't want to have to go out to truck every time . That was the purpose for better table lift . Can stick cooler on passenger bench and still sit at table . In winter the smaller cooler works ok . Fits right under fridge . Summer is the problem . Pat
Just following your lead, Pat.
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Old 07-01-2015, 05:08 PM   #142
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Re read post #110 . The 2 previous Dometic I had didn't have these huge clearance's all around .Dometic recommends 0-1 in all around . Don't know about yours but the cavity back there is way over that . The walls of these new frigs are not as insulated or thick as someone posted earlier mentioned Insulation is very important . It is interesting if you have the new and improved 6.7 you are happy . Good for you . You are not experiencing what we are. I changed out my heating element in both my previous Dometic's and also removed them for other reason's . One in a 1979 class C , one in a 1992 camper . I owned both for 12-13 years each and was 2nd owners with both so they were old hence needed a little 40. repair . You don't think we know what we are experiencing ? As Jubal said maybe not sell this 4.3 unit anymore unless you know what you are in for . I have said before even though I didn't want or need a huge frig if I knew what I know now would of gotten the 6.7 instead for 200 more . I am getting close to spending that now anyway . Pat
Pat, I'm not addressing installation issues. Those can be corrected, and should. As to what you're experiencing, yes, I can read. The issue with the 4.3 and inadequate cooling has been well documented here, on multiple threads.

What I was addressing is that an SN fridge isn't designed for hotter climates, and I sincerely doubt that any revised installation can correct that all the way.

I was also addressing the fact that ETI is caught between a rock and a hard place when it comes to SN fridges (the only ones they can get that will fit in an Escape) and the expectation that they will cool adequately in hot weather. Even with the "improved" 6.7 two door, we have to be careful how we use it when its hot. When Dometic offers a high performance fridge in North America that is the right size for an Escape, the issues will be solved. Don't hold your breath.
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Old 07-01-2015, 08:59 PM   #143
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Summing up my test results: All was looking good, I thought.

I got home at 6 this evening, and saw the latest inside fridge temp was a 10 degree jump-up sometime this afternoon, to 46°f. Had been a constant 5 dots, shore power, no food inside, the entire test period.

Other notable issue: at 6 PM sun obscured by cloud cover, the outside temp reading showed 103° f. A quick check of a different thermometer we keep in the back porch, in the shade, read 88°. Confirms suspicions my tongue box is a hot box, not to be trusted with a remote sensor.

My 11,000 BTU Dometic AC, however, worked superbly.
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Old 07-01-2015, 09:05 PM   #144
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Summing up my test results: All was looking good, I thought.

I got home at 6 this evening, and saw the latest inside fridge temp was a 10 degree jump-up sometime this afternoon, to 46°f. Had been a constant 5 dots, shore power, no food inside, the entire test period.

Other notable issue: at 6 PM sun obscured by cloud cover, the outside temp reading showed 103° f. A quick check of a different thermometer we keep in the back porch, in the shade, read 88°. Confirms suspicions my tongue box is a hot box, not to be trusted with a remote sensor.

My 11,000 BTU Dometic AC, however, worked superbly.
Hmm. The last stat might be an anomaly? I'd measure a couple more times for comparison.
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Old 07-06-2015, 11:32 PM   #145
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Dometic RM8551 insufficent cooling

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pics where I am going to put frig frig now, and I have to undo my fan Pat
Tom and Rich here is where I am now . Have cavity insulated , made new 45 degree baffle . bypassed fan from limit switch , wired it to a new switch on front of my refig . For good measure used a outdoor finish on wood . Couldn't resist. Dometic in manual said to use non wicking wood so I coated it . I also have a another fan to put up on the wall . i cut out the hole for switch too . Haven't wired and installed that yet .Maybe tomorrow can put my trig back . Pat
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Old 07-06-2015, 11:35 PM   #146
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Dometic RM8551 insufficent cooling

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Originally Posted by Patandlinda View Post
Tom and Rich here is where I am now . Have cavity insulated , made new 45 degree baffle . bypassed fan from limit switch , wired it to a new switch on front of my refig . For good measure used a outdoor finish on wood . Couldn't resist. Dometic in manual said to use non wicking wood so I coated it . I also have a another fan to put up on the wall . i cut out the hole for switch too . Haven't wired and installed that yet .Maybe tomorrow can put my frig back . Pat
another picture
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Old 07-07-2015, 06:55 AM   #147
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If that doesn't help, I do not know what will, nice job.
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Old 07-07-2015, 07:49 AM   #148
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Looks good Pat!!

You will love to hear this but maybe consider installing a second baffle just below the condenser so it pushes the rising air directly over the condenser and the air does not move away again before passing by the condenser. If I was doing mine again the second baffle would be placed at a 45 angle too. This was a test that worked so I will change if I ever pull the fridge again.
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Old 07-07-2015, 08:19 AM   #149
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Big progress Pat! It's hard for me to tell from the photos, but did you install a panel of thin (luan) plywood in the cavity as shown in Reace's photos? Or, did you just insulate the wall of the trailer behind the fridge? One last suggestion that may save you some trouble later: cut a piece of scrap trim the EXACT depth of your fridge after it's put back in and use it as a guide to make sure that the fridge will not bump into any of your new construction. After reinstalling the fridge, I had to take it out again to do some fine tuning to my work. Like Tom, I'm becoming quite adept at removing it (but which like you and him, I never want to do again). You're clearly a skilled craftsperson! I love seeing nice, clean work. Great job!
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Old 07-07-2015, 11:06 AM   #150
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If that doesn't help, I do not know what will, nice job.
Thank you Jim ! Pat
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