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Admiral

Upstate Ohio

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Joined: 06/08/2003

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Posted: 07/02/09 06:55pm Link  |  Quote  |  Print  |  Notify Moderator

mckellyb wrote:

Interesting.

Deen, you were on-track, but I've seen this topic go haywire in the past.

Plus, both inside and outside fans can help, greatly.

I've found our inside fan keeps the fridge below 42F, as long as it's below 115F, outside. Vegas...lack of shade...and it was in the sun, so real air temp, inside the wall, was likely 125+.

Any higher, and it's time to get moving. Actually, when this was happening, I was in the process of replacing the A/C belt on the engine, or we'd have already been gone.

Right this minute, it's 100F here in Dallas, and the Dometic RM1282's fridge side shows 35.2F while on a setting of '3'. I'm happy.

The interior fan helps a shocking amount, we've found, and while I initially had it hot-glued to the fins, the glue didn't hold in the cold, and it's sat up there for 60K+ miles, which includes Alaska's gravel, Yukon's pavement, a dirt/gravel Idaho NFS road, and going as far east as PEI. It won't shake off, apparently.

If you want to just try the internal fan, there is 12V at the interior light. I wound up merely wiring it to said lamp, the draw is tiny, so if the fridge is on, the fan is spinning.

Shazam! Good suggestion with the light wiring.


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pkunk

Questa, NM

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Posted: 07/02/09 07:21pm Link  |  Quote  |  Print  |  Notify Moderator

partsman01 wrote:

I find this all interesting, I have computer fans I thought about putting in the back of the fridge from the outside panel to blow the air up past the coils, but I am curious about the fridges with the settings, the one we just bought a 1999 Coachmen Catalina Lite 22' fifth wheel has a fridge that is factory set and there is no adjustment, only a climate control switch you can turn on or off, so I would think I am stuck with whatever the factory setting is, and would only be able to add a fan to make it work better.
The dealer did the recall it turns out just before I came to take possesion of it.

Move your thermister more to the top of the cooling fins to lower the temp. I have pretty much the same unit as you and with the thermistor near the top I maintain a perfect beer temp of 35°. A small 12v computer fan wired into the light power keeps the temps in all areas of the fridge constant.


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randallb

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Posted: 07/02/09 09:10pm Link  |  Quote  |  Print  |  Notify Moderator

We installed one of the solar powered chimney fans. Mount the small panel to the cover, drop the wires down the chimney, mount the fan and plug it in. You do not need the fan to run after the sun goes down and it is a very simple and efficient.
R&R

daver111

Mostly Midwest

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Posted: 07/03/09 06:22am Link  |  Quote  |  Print  |  Notify Moderator

I have a 1985 vintage Dometic RM763. Insulation might not be as good as newer units. I got the fan inside the fridge only, but here is something else real easy to help cool.

It is real hot outside in back of the fridge, the sun on the side and the heat from the gas boiler and coils. Line the back inside of the fridge with aluminum foil. I just cram it against the back, the shelves hold it.

Also, outside, the gas boiler is only about 1/4" from the steel case of the fridge. The boiler is hot- this radiates to the fridge. The case don't feel hot because it is a huge heat sink but it is. Loosly cram a sheet of aluminum foil between the boiler and the frige case. Crinkle it a bit to hold it, the looser the better so it don't absorb heat, you want to radiate heat away. I thought it might get blown around but it don't, but check it.

This was an emergency fix but it helps and I kept it in. Place the shiny side of the foil away from the food.

ScottnSherrie

Augusta, GA

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Posted: 07/03/09 08:02am Link  |  Quote  |  Print  |  Notify Moderator

I have a couple of salvaged 120mm case fans at the bottom of my fridge vent shaft on a switch as well. I have had a plan for a more robust and automated system for a while, just haven't pulled the trigger to get it done (full time job plus wife & two kids keeps me busy).

Anyway, here is a post I made a while back detailing my plans including a link to a schematic I did.

Newegg has a large selection of 120mm fans available. I am partial to the Scythe S-Flex SFF21G 120mm Case Fan (search on Newegg for SFF21G) as they currently have them on sale for 14.99 with free shipping. I know that there are 120mm fans cheaper, but those usually have sleeve bearings and would not hold up well with the shaft mounted vertically.


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