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Canadian_Rainbi's avatar
Jan 26, 2016

UPDATE: Mounting temporary fans Norcold 1201LRIM

I thought it would be clearer to start a new post than continue with my previous one: Original thread

Fridge is in a slide and does not have a roof vent. One of the original fans has failed, the right hand one in the photo below.

We are in southern Mexico, no techs, fewer parts.

I cannot pull the fridge to replace the fan(s)--I do not have the strength or stamina anymore. I am hoping for a temporary fix to last me until we get home in April.

I need answers to a couple of questions. Or other suggestions:

I found 120mm 12VDC fans at a computer store here. They draw 260mA. However they have a plastic body and blades. A bit concerned with heat issues.

1) Where to place them?

I am thinking that I could make a support from aluminum flat or angle stock and place one or both fans above the existing fans. I would have to anchor the aluminum at the lower edge of the upper vent.
All access would be from the top vent.
I could take the 12V positive from the wires to the thermal switch at the top fins.

2) Where should I make the negative connection? I am pretty sure that the white and black wires in this photo are the - and + 12 feeds.

Do I need to be concerned about heat for the wiring I have to add? Regular stranded automotive type wire is available, I'd have to hunt for high temp wire.

3) Or should I try to fit one of the fans in the lower part? There is very little room here and I could not place the fan so that is would blow directly upwards. Again, heat here could be a problem.

Thanks,

Art

PS to Doug:

"If the noise you hear STOPS when you open the refer door, it is the rear 2 cooling fans. The ONLY way to access those fans is to pull the refer. There are 2 fans and a fan tstat. REPLACE both fans and the fan TSTAT. Also, run a 2 wire from each side of the fan tstat down the back of the refer and terminate at the rear bottom. Use this 2 wire to test and jump the fans to come ON in case the fan tstat fails again(very common). Doug"

Wish I had followed this advice that you posted in response to my query about noisy fans back in June of last year. :S
  • It is better to install them at top of fridge so the fans pull air across the condenser fins (section of cooling fins at top of fridge) as that is where the ammonia vapor gets condensed back into liquid....the more ammonia liquid the better cooling effect downstream

    Run wiring along left side (opposite of burner stack)

    Switch 'positive' side (ON/OFF Toggle)
  • The easiest solution would be to install several of the computer type fans on the inside of the lower vent, using nylon ties. That's what I did. I used five fans and connected all of them to a switch. I had a twelve volt bar to draw power off along with a ground, so for me that was an easy choice. You may have a similar bar on the lower left. It is black with wires connected. Good luck.

    Obviously, fans on top are more efficient and would be the first choice, but as you indicated access is the problem with that option. You could always have the frig pulled out later at a RV repair facility back in the states later.

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