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Old 06-16-2004, 01:42 PM   #15
uwe's Avatar
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
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Location: 1963 26' Overlander
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I just recently picked up a rebuild 2-door Dometic fridge for my 63 Overlander, and got a good look at the workings of the absorption fridges. I got mine from Crane's in Vallejo, CA. Only 7 hours drive from here....
Anyways, the electric function on my current refrigerator, a single door Dometic of 1971 vintage, works grreat since I replaced the heater element. It was a simple job, took about an hour or so.
I blew out the flue with compressed air, and now the propane function works better, too. While in Baja last March, Murray ( Creampuff) helpe dme save my food by cleaning the burner tube and orifice. we just got back yesterday from a 5-day trip through Californias Central Coast, and the fridge was usd in both modes, gas while driving, electric while camping. Both modes provided exceptional results. I had to turn the electric thermostat down, to keep food from freezing. This was on 70-75F days.

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Old 06-16-2004, 03:10 PM   #16
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1996 28' Excella
Okemos , Michigan
Join Date: Apr 2003
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Post Update on Dometic Difficulties 1 and 2

Difficulty #1 turned out to be a non-working electric heater. I'll track down
the wiring and check the stash the PO left me for a spare heater. First I have
to do something about the 10 billion mosquitoes that have taken up residence
in my yard.

Difficulty #2: The fact that the refrig. worked ok on propane for 9 days before
giving problems still suggests a problem with the thermostat. Does anyone know
how the "automatic defrost" works on an RM100? After turning the gas off for
20 minutes and restarting fixed the problem, it seems that the "reset"
redistributed the amonnia vapor and allowed it to flow properly.

Side note: It is recommended to use the shelf in the freezer as the standard
for leveling since it has the amonnia pipes attached to its bottom. Unfortunately, the shelf is not flat. The little bull's eye level gives a different
reading every 2 inches across its surface. Take your pick. I take readings
at several other surfaces and average.

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Old 06-16-2004, 03:36 PM   #17
uwe's Avatar
2007 25' Safari FB SE
1958 22' Flying Cloud
1974 29' Ambassador
Yucca Valley , California
Join Date: Jun 2002
Location: 1963 26' Overlander
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here is some good reading on heat absorption refrigerators:
This site has answered many of my earlier refrigerator questions.
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Old 06-16-2004, 04:21 PM   #18
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2004 30' Classic Slideout
Fenton , Missouri
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Originally Posted by ipso_facto
It looks like with me, leveling is an issue. I didn't realize I would be affected even on electric and neglected to park it properly. It's so unlevel now, the matress on my twins slides to the side somehow.
Here is a copy from the site metioned above.

Running While Not Level

The second biggest killer is running unleveled. When the refrigerator is operating, water moves around the pipes and flows down the coils on the back into the main storage tank. The pipes on the back all slope down from side to side. When the RV is off-level, one direction of the coil will be flowing up-hill and the water flow will stop. When this happens there is no flow to the boiler section and the water in the boiler pipe boils dry. The rust inhibitor dries up and blocks the boiler tube. If the unit is kept running the boiler pipe will get so hot that it will crack from the gas pressure inside the coils (450#). Now the cooling unit is really dead.

Never believe the stories that the newer units do not need to be run level? They are made to run more off-level than the older units BUT there is still a point where they will stop working. Always try to level you RV, as best you can, and if you have to park for a long time and cannot level the unit, shut down the refrigerator. It will keep the food cold for hours. Most of the newer units we repair have all been run unleveled and cracked the boiler. (This can be a very costly mistake)".


Jack Canavera
AIR #56
'04 Classic 30' S.O.,'03 GMC Savana 2500,'14 Honda CTX 700
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