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Old 06-08-2015, 03:28 PM   #21
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Moodman,,,,,,a couple things to consider.....
1.Yes, it takes overnight before it starts cooling well.
2. Is the fridge on one of your slides? If so,,,,make sure the outside condenser cooling fan is operating. You'll hear it if you have one. Some people get irritated with the noise, and I know someone who disconnected it. That will destroy your fridge, so don't entertain those thoughts. You normally won't have a cooling fan out there if your fridge isn't on a slide since the heat leaves by a rood vent and not a side vent.
3. Is your RV close to level. If it's way way out of level, the absorption refrig won't work.
4. Crunchmand is right about installing fans. I have one each in the freezer and refrig compartment. They run on D cells and really do help with cooling. They last about a month, but they're well worth it.
5. That tube you're talking about is the temperature sensor and it really doesn't matter where you slide it on the last fin. It's not really going to drastically change your temp. Just make sure it's installed properly.
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Old 06-08-2015, 03:33 PM   #22
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Absorption refrigerators have be operating for years before they put fans in and on them. Unhooking a fan will certainly decrease the cooling ability, but it certainly will NOT destroy the unit.

My 08 and 12 didn't even come with fans. One was a Dometic and the one we have now is a Norcold. I added 2 fans in the rear and 2 inside the frig.
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Old 06-08-2015, 03:37 PM   #23
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Oldcoot,,,,I've been in the refrigeration business for over 40 years. I'm pretty sure I know what I'm talking about. If your fridge in on a slide, it'll have a fan outside, and it's critical. That ammonia and the solution it's in depends on proper heat transfers. Without the fan, you're greatly shortening the life of the fridge.
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Old 06-08-2015, 03:43 PM   #24
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Originally Posted by Grampa Jim View Post
Oldcoot,,,,I've been in the refrigeration business for over 40 years. I'm pretty sure I know what I'm talking about. If your fridge in on a slide, it'll have a fan outside, and it's critical. That ammonia and the solution it's in depends on proper heat transfers. Without the fan, you're greatly shortening the life of the fridge.
Explain why they still put units out without fans. I agree if it is in a slide it needs a fan, but none of mine came with fans since owning campers with refrigerators starting in 1975.

Do they help? You bet, are they critical, NO!
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Old 06-08-2015, 03:50 PM   #25
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Quote:
Originally Posted by Grampa Jim View Post
Oldcoot,,,,I've been in the refrigeration business for over 40 years. I'm pretty sure I know what I'm talking about. If your fridge in on a slide, it'll have a fan outside, and it's critical. That ammonia and the solution it's in depends on proper heat transfers. Without the fan, you're greatly shortening the life of the fridge.
I do understand what you have said mine is in a slide. You will get the same natural movement, hot air rises as a top discharge. The hot hot air that rises has nowhere to go but be trapped in the slide. I can not hear any fans going at all being I upgraded to a ball bearing fan and also increased the CFM. If you do not do this on a slide out it will decrease your cooling period. It is still a good idea for your refer with a top discharge being the more air you push against the coil the more efficient it will become. Will it still work without adding fans yes by convection. But will work harder and take longer to cool down.
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Old 06-08-2015, 04:14 PM   #26
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As others have said, if the freezer is running so is the fridge part. It takes awhile for the fridge to get cold, especially empty. It can take up to 48 hours, but generally 24 to 36, to be at operating temp. Most people start it up a day or two before you plan to use it.

In the original post you said dual fridge 12v and LP, that is kinda a fallacy, it doesnt cool off of 12v, 12v runs the boards and such (unless it is a 3 way fridge). Just something to think about. It cools from shore power or LP.
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Old 06-08-2015, 04:38 PM   #27
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It DOES work after all

Following all your excellent ideas, I let it run for 24 hours.
Then, I used my infrared thermometer and actually probed my house refrigerator. The temps ranged between 38-42 degrees, depending on where the laser was pointing in the fridge.
Then I checked the freezer, and it came in between -1 and +1 degrees.

Then I checked the camper, and those temps were almost identical. The freezer was -1 to + 1 (identical) and the refrigerator part ranged from 38 (right on the fins) to 48 near the bottom of the empty fridge.

No doubt putting cold food in there will moderate the temps.

Also what I got out of this discussion is that it might help to put a circulating fan in the food portion, but ALSO it might help to make the unit cool faster to put a fan in the outdoor part to take away excess heat faster.

What do you think?

Anyway, thanks for all the great input. My DW will be pleased, and if she says the refrigerator doesn't seem as cool as the one at the house, I will take along my IR thermometer and show her.

I've been married 36 years, and figured out I can either be right or happy, my choice.
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Old 06-08-2015, 04:56 PM   #28
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Fans! Youroo!!
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Old 06-08-2015, 05:00 PM   #29
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Where did you buy those fans? Do you know the cost? Are they hard wired or battery?
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Old 06-08-2015, 05:17 PM   #30
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You can get those fans on eBay. I got one last week and installed in a few mins. Then started my fridge and it was to operating temp in 12 hours. That's 38 in fridge and 0 in the freezer, and can nearly hear them. They run off of the 12v. I tied mine into the hot wire for the fridge light, it was pretty simple.

Just look up "fridge fans" on eBay. Mine was $16 shipped...
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