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Old 06-20-2006, 09:11 PM   #15
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tim

you will need a caulk tube of thermal mastic. i can get the address off mine.

john
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Old 06-20-2006, 09:18 PM   #16
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tim

you will need a caulk tube of thermal mastic. i can get the address off mine.

john
Thanks, I had read about thermal mastic in both sets of directions, so that was going to be my first hunt in the morning. I've located some on the web, but I'm hoping I can find some locally. If you could post the address off yours, that may be where I'll end up. I have no hint of the availability of that stuff. I'm hoping it's fairly easy to find.
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Old 06-20-2006, 10:09 PM   #17
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Exclamation Precision is needed

Tim,

Do a bunch of measuring of both cooling units before the swap. Measure the foam block and be sure that the dimensions are exact. Then check all of the mounting holes that penetrate the box and go inside the freezer section and those between the fins in the refer section . It is CRITICAL that these be exactly the same! Also, note when you start removing screws that some are of different lengths. Be VERY CERTAIN that you mark where these go and put them back exactly as you have removed them. Very important!!!


Other than that, let me know if you can't get the mastic. This too is critical, as it is the only medium that will effectively transfer the heat from out of the refer to the cooling unit, thus getting the box cold. Too much or too little and you decrease the efficiency of your unit.
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Old 06-21-2006, 08:59 AM   #18
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Tim,

Do a bunch of measuring of both cooling units before the swap. Measure the foam block and be sure that the dimensions are exact. Then check all of the mounting holes that penetrate the box and go inside the freezer section and those between the fins in the refer section . It is CRITICAL that these be exactly the same! Also, note when you start removing screws that some are of different lengths. Be VERY CERTAIN that you mark where these go and put them back exactly as you have removed them. Very important!!!


Other than that, let me know if you can't get the mastic. This too is critical, as it is the only medium that will effectively transfer the heat from out of the refer to the cooling unit, thus getting the box cold. Too much or too little and you decrease the efficiency of your unit.
Lew,

Thank you so much for this information. Let me ask you a very unfair question . The good refer I have is a 3800 Dometic, originally from a 1986 trailer belonging to a friend. He had a new cooling unit put in by the Dometic repair facility in Ashland, VA (I'm assuming they installed it correctly?). It also has a new circuit board. I know it works, because I used it during a 9-day period we were without power from a hurricane. I've already placed it in position in my MoHo, but have not secured it, nor reconnected gas/electric lines. All the shelving, bins, etc. from the MoHo will fit, and even the doors will transfer. The only thing I'll lose is an external drain for the auto-defrost, and controls that show a little more info, but don't really do any more. I'm getting a little nervous about all the precision necessary to do this cooling unit swap . Would you recommend that I just use the refer that's working rather than try this cooling unit swap? I would hate to attempt this and not get it right when I have a perfectly good refer I can just finish installing. I realize this is putting you in possibly an awkward position, but I really would like your opinion. I promise I will not hold you accountable either way ! I just don't want to potentially mess this up when I've already got a working refrigerator all but installed.

Best,
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Old 06-21-2006, 12:10 PM   #19
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Tim,

Give me a call on this. 239-601-8650.
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