Re-thinking the RM8551 4.3 - Page 13 - Escape Trailer Owners Community

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Old 08-10-2015, 10:12 AM   #121
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Myron,
Have you tried to relocate the thermostat, on my unit it is on the lower return tube and can be moved closer (hotter) to the burner or farther(cooler) in opposite direction.
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Old 08-10-2015, 10:24 AM   #122
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No I would not do that because of fan wire constraints, not wanting to re-invent the wheel, etc...
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Old 08-10-2015, 10:39 AM   #123
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On the RMD8555 models it is located on the bottom return coil and can be moved, perhaps 6 " in either direction, limited by the wiring, as you have.
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Old 08-10-2015, 10:49 AM   #124
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That is very interesting. Must give this some thought.
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Old 08-10-2015, 11:23 AM   #125
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Yes, those are wires (top arrow) to fans and the right one is the supply. The other red and black (bottom arrow) are wires are ones I installed to bypass and are my switch wires. The thermostat is 150 degree so they do not come on while on 120v but on propane they come on and stay on, even after switching the unit off for about 5 minutes. But I have to use the switch to activate the fans while on 120v or 12v due to the high 150 degree set point.
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Old 08-11-2015, 06:12 PM   #126
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For 2 days, after installing the new 130° fan thermostat switch, my two rear fans came on, whined on, but never stopped, all day. All day. This morning fans came on at 8AM when it was 67° outside. Something just weren’t right.

Not happy. Was about to put the original switch back. Then, looking at Jim’s switch picture, suddenly an eureka moment! A light goes on in my attic. The nine muses rubbed scented balm into my forehead. It was Newton and the apple all over again.

Dealer who sent me that 130° switch included advice on location installation, which I read but naturally ignored. Good thing I didn’t throw that sheet away.

I had done a straight switch of switches. Same original location, up top between the black fins. Seemed logical or why would Dometic put it there? Maybe I also did not like having to drill 2 holes into the back wall or run longer wires. Now, I’m thinking, that spot must be just too hot for a thermo switch with a lower set-point. What if that pipe never gets cooled?

The dealer’s illustration suggested a switch location that matched with Jim’s pix; not at the top fins where Dometic had it, but at mid-fridge or lower. Good I’m getting real good at pulling out the fridge.

Latest pix here shows new switch location below and between the fans. So far, fridge temp dropped from 79 to 41°F in 3 hours. At 4 PM it is 83°F in the trailer, 39°fridge. Manual switch override works good. Auto-fan has yet to come on.

Moral of story? Brain has switches too. Could this entire process ever be more fun?
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Old 08-11-2015, 07:18 PM   #127
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Myron,
You may want to put that refer on a slide for ease of access........
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Old 08-11-2015, 08:11 PM   #128
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Quote:
Originally Posted by cpaharley2008 View Post
Myron,
You may want to put that refer on a slide for ease of access........
Now THAT's a good idea!
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Old 08-11-2015, 08:19 PM   #129
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[QUOTE=MyronL; Could this entire process ever be more fun?[/QUOTE]

Well your write-ups are fun for us to read

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Old 08-13-2015, 05:51 PM   #130
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I have this fridge as well. RM8551 on the sticker in the cabinet.
I thought it didn't cool very well.
I noticed that, on propane, it seemed to go up a few degrees every hour we were driving.
43 degrees when we started driving from the campsite and 60 degrees 4 hours later.
So, is everyone with this fridge having problems?
I called ETI and they say this is not one of the fridges that they are swapping out.
Is this a RM8551 as the ETI sheet says or is it a RML8551 that is on the dometic web site?

It does not work as good as the Dometic in my 19 year old truck camper.
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