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Old 07-09-2016, 10:18 PM   #1
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Dometic Frig Cooling Question

New 2017 rockwood 2906ws with Dometic frig. Brought home this afternoon plugged in to 110. Cooling using auto which puts on electric. The freezer seems to be cooling down fast, frig not so quick. I know it is much bigger space. Will it cool quicker using propane? Outside behind the frig by the grill you can hear a noise which I assume is the gas inside cooling. Sounds like small motor. First to admit I know very little how the Rv frig works. Looking for others experience. Thanks.
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Old 07-09-2016, 10:22 PM   #2
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Dometic Frig Cooling Question

May take 12/24 hours to completely cool down.
If the freezer is cooling down so will the fridge, as the fridge and freezer are basically one in the same.
You probably hear the cooling fan in the back.




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Old 07-09-2016, 10:31 PM   #3
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It would help if you posted the model number. Here's a short primer:

1. Temperature control: Inside the fridge, upper right hand side, there is a long pointy thing called a thermistor. It's inside a white plastic clip that's clipped to one of the cooling fins. Sliding the clip/thermistor UP increases cooling; sliding it down decreases cooling. Sometimes the thermistor slides down inside the clip, so check that. Raise it up as high as it can go; you can always drop it down if the fridge gets too cold.

2. Noise by grill: Some fridges have a fan installed to aid in pushing cooling air up around the coils behind the fridge. These are usually installed in fridges that are installed in a slide, because they don't have a roof vent, but an upper vent on the side of the slide. That could be what your hearing. A lot of folks without this fan add their own to improve cooling. Some replace the Dometic fan, if they have one, with better fans. Usually 120mm computer fans.

3. Make sure TT is level. Fridges need to be level to work properly.

4. Cooling on propane: Some people think their fridges cool faster on propane, some think faster on electric. Who knows?

5. Cooling speed: These fridges operate on an ammonia absorption principal. No moving parts, just uses heat to make the gas go round and provide the cooling. They are not great for actually cooling stuff; they really just keep stuff cold. Stuff you put in it should be cold already if possible. Many people turn them on the day before they leave to go camping so they are cold when they leave. They'll load it up with cold stuff then. They will get colder faster if you have stuff in them (thermal mass).

6. Operation while traveling: About 50% (guessing) of RV'ers travel with their fridges operating on propane.
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Old 07-09-2016, 10:35 PM   #4
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Absorption style refrigerators take a very long time to cool off, whether on gas or electric. The air doesn't circulate through a cooling coil like your home unit, everything is static. I found the back of the wall of the freezer to get cold first, and that took over an hour. I left it going overnight and by morning everything was plenty cold.
A thermometer for both the freezer and fridge is a good investment. They also make little fans that help circulate the air in the fridge to keep the temperature more even.
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Old 07-09-2016, 10:43 PM   #5
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Quote:
Originally Posted by DavidBo View Post
Absorption style refrigerators take a very long time to cool off, whether on gas or electric. The air doesn't circulate through a cooling coil like your home unit, everything is static. I found the back of the wall of the freezer to get cold first, and that took over an hour. I left it going overnight and by morning everything was plenty cold.
A thermometer for both the freezer and fridge is a good investment. They also make little fans that help circulate the air in the fridge to keep the temperature more even.
X2 on thermometer. This is the one I've got:

AcuRite® Digital Refrigerator/Freezer Thermometer with Temperature Alerts - BedBathandBeyond.com

(Stay away from Taylor - they're junk).

Here's an inside fan:

Dometic Refrigerator Deluxe Fan to Increase Cooling Inside with Metal Grill | eBay

Google RV fridge fan and you'll get others; some operate on batteries, some like this one you have to wire up to the light circuit or run wires down through the drain line.
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Old 07-10-2016, 09:49 AM   #6
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Thanks everyone

It is cooling fine this morning. It does have cooling fan as frig is in slide out
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Old 07-10-2016, 11:25 AM   #7
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Great!
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Old 07-10-2016, 03:10 PM   #8
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They cool better if you put something in them.

They work by removing heat and cool much better if you add something cold like beverages from your home refer.
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Old 07-10-2016, 04:02 PM   #9
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Originally Posted by rockfordroo View Post
Here's a short primer: ...
Good job, Rock.
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Old 07-10-2016, 06:11 PM   #10
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Quote:
Originally Posted by rockfordroo View Post

Here's an inside fan:

Dometic Refrigerator Deluxe Fan to Increase Cooling Inside with Metal Grill | eBay

Google RV fridge fan and you'll get others; some operate on batteries, some like this one you have to wire up to the light circuit or run wires down through the drain line.
Thanks for the link Rockfordroo! I was in the process of kludging something together with a little USB fan, but I like this better. Just ordered one, I'm interested in how well it works.
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