| fridge [message #166853] |
Thu, 19 April 2012 17:27  |
jodist
Messages: 30
Registered: April 2011
Location: pottstown,pa
Karma: 0
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Does anyone know where I can find an owners manual and how to change the heater on a Dometic RM 100 fridge.
Thanks,
John Stehle
78 Royal by Coachman
John Stehle
78 royal by coachman
Pottstown,Pa
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| Re: fridge [message #167017 is a reply to message #166853] |
Fri, 20 April 2012 19:26  |
jodist
Messages: 30
Registered: April 2011
Location: pottstown,pa
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Thanks for the info. Seems to be a bad heater which I expected. Now to figure how to get to the heater maybe need to remove the unit.
Thanks Again
John Stehle
78 Royal
John Stehle
78 royal by coachman
Pottstown,Pa
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| Re: fridge [message #167028 is a reply to message #167017] |
Fri, 20 April 2012 21:00 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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All the fridge ballast heaters I have seen are serviceable from the rear of the fridge with the unit still in the coach. You might have to remove a sheet metal panel to get at it but it should be doable from the rear opening. Just follow the pair of wires from the board to the chimney location
Roy Keen
Minden,NV
76 X Glenbrook
[Updated on: Fri, 20 April 2012 21:02] Report message to a moderator |
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| Re: fridge [message #175962 is a reply to message #166853] |
Sat, 07 July 2012 21:59 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Any quick ideas on what might cause the fridge to not get cold on AC or gas, but the freezer does get down to the proper temp?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] fridge [message #175963 is a reply to message #175962] |
Sat, 07 July 2012 22:08 |
Ray Erspamer
Messages: 1707
Registered: May 2007
Location: Milwaukee Wisconsin
Karma: -3
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I just researched this. Ours was doing the same thing. Recommendation was to move the thermistor which is clipped to the alum fins in the refrig...move it to the top area of the fins where they tend to be warmer....thus keeping the cooling "turned on" longer and getting the interior colder. Our thermistor was near the bottom of the fins and moving it to the top did make a difference.
Sent via BlackBerry by AT&T
-----Original Message-----
From: Randy <Acrosport2@hotmail.com>
Sender: gmclist-bounces@temp.gmcnet.org
Date: Sat, 07 Jul 2012 21:59:05
To: <gmclist@temp.gmcnet.org>
Reply-To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] fridge
Any quick ideas on what might cause the fridge to not get cold on AC or gas, but the freezer does get down to the proper temp?
--
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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Ray Erspamer
78 GMC Royale Center Kitchen
403, 3.70 Final Drive
Holley Sniper Quadrajet EFI System,
Holley Hyperspark Ignition System
414-484-9431
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| Re: fridge [message #176017 is a reply to message #166853] |
Sun, 08 July 2012 09:08 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Any ideas how cold the absorption fridges can get? I've had mine plugged in and the coach closed up during our recent heat wave (103 degrees outside temp, I didn't have an inside thermometer). When I checked the inside fridge thermometer, it read 42 degrees in the main fridge compartment after being on 120 volt power for a few days.
I wonder what are the limits, as it does get nice and cold when the outside temps are more reasonable?
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: [GMCnet] fridge [message #176019 is a reply to message #176017] |
Sun, 08 July 2012 09:27 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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George,
I have a Dometic two way fridge in Double Trouble, I wasn't happy with the
way it performed in hot temps so I did this:
www.gmcmhphotos.com/photos/member-galleries/p43958-fridge-compartment-fan.ht
ml
The Dometic has five buttons to select the temperature; 5 being the warmest
1 being the coldest. Normally I leave it on 3 and even in the hottest temps
I never have to set it to 1.
The fans DO NOT blow on the coils but create enough of a upwards draft.
Yeah, I know - OVERKILL! ;-)
Regards,
Rob M.
-----Original Message-----
From: George Rudawsky
Any ideas how cold the absorption fridges can get? I've had mine plugged in
and the coach closed up during our recent heat wave (103 degrees outside
temp, I didn't have an inside thermometer). When I checked the inside
fridge thermometer, it read 42 degrees in the main fridge compartment after
being on 120 volt power for a few days.
I wonder what are the limits, as it does get nice and cold when the outside
temps are more reasonable?
--
George Rudawsky
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GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] fridge [message #176025 is a reply to message #175962] |
Sun, 08 July 2012 10:28 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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That is typical of a refrigerator that is failing due to the formation of deposits in the tubes. The ammonia/water cycle requires flow back down through the coils.
This is often caused by running unleveled. When the refrigerator is operating, the water ammonia solution 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.
The refrigerator depends on gravity to move the solutions through the system once the heat source has lifted the solutions to the top of the cooling unit. The passages that the solution must travel through have only a slight slope to them and any off-level condition will hinder this gravity flow. Parking on a hill, with your refer running while you go off to lunch, starts the degradation of the system and every time you do this, it adds up. There is no way to reverse this problem.
What happens in this situation, is that the solution in the cooling unit gets overheated, and a component of this solution (the corrosion inhibitor) crystallizes and becomes solid particles that float around and lodge where they're not supposed to.
Tipping the refer upside down, may or may not, dislodge the particles, but they are still in there and will (sooner or later) plug things up again.
When it really gets bad the particles plate out on the surface of the tubes and restrict them. At that point it is reversible and it becomes time to replace the cooling unit or the refrigerator.
Emery
On Jul 7, 2012, at 8:59 PM, Randy <Acrosport2@hotmail.com> wrote:
>
>
> Any quick ideas on what might cause the fridge to not get cold on AC or gas, but the freezer does get down to the proper temp?
> --
> Randy
> 1973 26' Painted Desert
> Ahwatukee (Phoenix) AZ
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: fridge [message #176041 is a reply to message #176017] |
Sun, 08 July 2012 11:58 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
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| GeorgeRud wrote on Sun, 08 July 2012 07:08 |
Any ideas how cold the absorption fridges can get? I've had mine plugged in and the coach closed up during our recent heat wave (103 degrees outside temp, I didn't have an inside thermometer). When I checked the inside fridge thermometer, it read 42 degrees in the main fridge compartment after being on 120 volt power for a few days.
I wonder what are the limits, as it does get nice and cold when the outside temps are more reasonable?
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Absorption fridges are MUCH more effected by the air temperature (mostly the area around the coils) around them than compressor fridges.
There are things that can be done to make them work "better" but in hot climates, they may never be "good enough"... mostly due to expectations of people who have compressor fridges everywhere else.
I replaced the 3 way in my 26' with a 2 way compressor... not cheap but works very well. Might not be the best for dry camping though.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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