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Open Roads Forum  >  Tech Issues

 > Dometic RM7401 3 way fridge question...

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Chirpnchicks

Summerfield, NC

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Joined: 01/15/2006

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Posted: 05/15/12 08:33am Link  |  Print  |  Notify Moderator

Hi,
Does anyone in B-land have one of these? I assume so. Mine is functioning with all three power choices but seems less robust (slower freezing and cooling in general, lukewarm venting) than earlier years on the propane mode, which is our "default" setting.
Among the possibilities:
I read in the Tech section about the merits of burner cleaning. I took off the outside access covers and saw that the burner is very small and not easily accessible so I stopped that line of reasoning for now.
I'm running an experiment on direct electrical setting to see if there is any difference at a given thermostatic setting between propane and electrical power.
After that I'll try a higher thermostatic setting to see if that overcomes the deficiency.
I am very careful to use the fridge when level... it's always off in storage because it's parked on a slope.
Any thoughts?
Thanks,
Jay

steveh27

Grosse Pointe Woods, MI

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Posted: 05/15/12 10:30am Link  |  Print  |  Notify Moderator

I had to have the chimney just above the burner cleaned out. It was partially blocked & caused problems. I was told I could use a long handled bottle brush or something like that. Thhis time I had an RV shop do it for $. I think that's your problem. You need to be able to check the burner as debris from the chimney can fall onto it restricting the flame.

Handbasket

Asheville, NC

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Posted: 05/16/12 12:22pm Link  |  Print  |  Notify Moderator

Here's a pdf. of the manual for the Dometic 2354 http://www.dometic.com/31a5c621-4a0e-4bd0-bbc8-006ba0f165f1.fodoc . I think that if you enter 'Dometic' and the four digit model number into google, the user's manual will be at one of the first links. The burner & chimney cleaning instructions start on p. 13-14. Not a real simple procedure, but probably not too difficult for the average DIY'er.

On late edit, here's a link for a pdf. shop service manual for a lot of recent models. http://www.fourwheelcampers.com/NewDometicRefrigeratorManual.pdf. It includes quite a bit for the troubleshooting DIY'er. Down a ways into it, it says 'doesn't have to be perfectly level, but more level works better'.... interesting.

Jim, "That's not a hairstyle. It's a cry for help!"

* This post was edited 05/16/12 05:05pm by Handbasket *


'06 Tiger CX 'C Minus' on a Silverado 2500HD 4x4, 8.1 & Allison (aka 'Loafer's Glory') www.tigervehicles.com

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Channel Islands Harbor, Ca.

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Posted: 05/18/12 02:08am Link  |  Print  |  Notify Moderator

Moved to Tech Issues

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Handbasket

Asheville, NC

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Posted: 05/18/12 07:40am Link  |  Print  |  Notify Moderator

From the service manual above (http://www.dometic.com/36a91f2a-8752-462b-ae68-39dcf2b66b21.fodoc), which seems to cover many newer models:

"8.3 Air Leaks
Check the gasket on the doors to be sure of a positive air seal. A simple method to check gaskets is to close the door on a dollar bill, then pull the dollar bill out. If no resistance is felt, the gasket in that place is not sealing properly. This should be done on all four sides of the door in several places. If a gasket is not sealing properly, lift up inside of door gasket and insert 1/4” ball of fiberglass insulation at all four corners on both doors. This is especially important to the top corners. Next warm the gasket material with a hair dryer. Then close the door and the magnetic strip should pull the gasket to the metal frame. Leave door closed until the material has cooled. Then recheck for a positive seal. If a positive seal cannot be achieved, replace the door gasket.
.....
Note: Air leaks will cause insufficient cooling as well as rapid formation of frost."

Something you might want to check. I think I'll do it to mine soon. I've got a suspicion that mine may fail the dollar bill test at least on the bottom edge.

Jim, "Talk nerdy to me."

Chirpnchicks

Summerfield, NC

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Posted: 05/23/12 05:34am Link  |  Print  |  Notify Moderator

Thanks for the replies! I'll work all angles... Jay

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