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Old 09-15-2012, 06:02 PM   #1
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Cure for Dometic Fan Noise

I performed this modification for a friend at our RV Resort in Arizona. The OEM fan with Dometic refrigerators not vented thru the roof are very noisy very much like the older bathroom vent fans. The fix is [2] 92mm computer fans. The bracket on the Dometic refrigerators is pre drilled to accept the computer fans. I purchased [2] fans from 3Btech.net for $5.00 delivered and installed them in place of the OEM fans. In the photo there are dissimilar fans. One is 80mm and the other is 92mm, but the final modification both are 92mm. The two fans move more air than the OEM single fan and are completely silent.
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Old 10-02-2012, 08:19 AM   #2
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Is there any special considerations for doing the wiring for this or is it pretty straight forward?
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Old 10-02-2012, 08:58 AM   #3
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I have not done this modification myself but I believe the original
fan as well as the replacement computer fans are all 12v dc.
Just watch your polarity so the replacements blow air in the same direction
as the original. You'll most likely have to cut off the computer connectors
on the new fans and splice them to the old wires but that's fairly easy.

Good Luck!
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Old 10-02-2012, 08:59 AM   #4
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The wiring was straight forward. Red to Red, Black to black. I clipped the Dometic OEM fan plug and soldered a molenx [computer standard fan plug] to the clipped end, shrink wrapped the joints so it was as simple plug it in modification. The hardest part of the job was removing/re-installing the weather protection behind the exterior removable panel. Best regards, John
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Old 10-19-2012, 01:49 PM   #5
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I was just ready to order two of these fans. I noticed that they have 3 wires on the them. Is that what yours had and you only used the red and black wires? If not do you have a part number for the fans you purchased?
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Old 10-19-2012, 07:20 PM   #6
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Camper, Since this was not my rig and I was concerned about fan noise I ordered the [3] speed units. If they were too noisy I could just run them at a lower speed and preserve my reputation. The high speed was entirely silent so I left them on high but the wiring is the same, red to red, black to black. If you would like to only deal with [2] wires the 3Btech.net part number is:Tech Part Number: FAN-CAS-92MM-MOL I would highly recommend a ball bearing fan over a bushing unit as the hardest part of the job was removing and re-installation the rain guard behind the bezel. You can either clip the Dometic plug an use the molenx or the other way around. Just make sure to solder and heat shrink the splices and tape the plugs. Best regards, John
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Old 10-20-2012, 07:11 AM   #7
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Thanks
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