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Old 05-15-2019, 11:34 AM   #1
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Dometic NDA1402 OEM exterior cooling fans?

There was a thread dated back in 2011 similar to this but thought I would start a new one since that one is so old.

My fridge is mounted in a slide and has the upper and lower side vents. I plan on adding additional fans in the top but want to make sure that if I have OEM fans, that they are working.

I see that some people mention that there are cooling fans on the outside that blow over the condenser but I don't see them on mine. I have to admit, that it is very tight in there. There is less than a 1" gap between the plywood plenum and the condenser fins. They did a pretty good job sealing the plenum top also.

If your 1402 has the OEM fans, can you tell me where they are?
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Old 05-15-2019, 12:59 PM   #2
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Can't tell from your photos....but some NDA1402 did come with OEM fans on backside of frisge cooling unit


IF so equipped they would be installed med-level centerline (just above the absorber tubes (large slanted tube bundle) and be controlled by a thermostat attached to the Condenser FIN (far LEFT on 1402)
Fan power would come form the 12V +/- terminal block (where 12V DC power to fridge is connected)
Fan power would have a 3A in-line fuse.....12V DC + to thermostat then to fans
Thermostat would turn fans ON when condenser FIN temp reached 135*F and OFF when FIN temp dropped to 115*F


Here is Ventilator Kit info
http://bryantrv.com/docs2/temp/powervent.pdf


Here is wiring diagram for 1402 WITH fans
http://techsupport.pdxrvwholesale.co...c-38513241.pdf
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Old 05-15-2019, 01:08 PM   #3
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I haven't seen mine, but I know there's one in there as I've heard it running on occasion.
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Old 05-15-2019, 01:26 PM   #4
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In a slide they SHOULD be installed
Normally you would be able to see them via the upper sidewall access/vent


BUT your RV MFG actually installed the fridge CORRECTLY with the baffles so I would also suspect you have fans


Look at far left fin of condenser for that fan control t-stat
You can bypass it and test run fans


Via Lower sidewall access/vent you should be able to find a red wire with a 3A in-line fuse....fan power
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Old 05-15-2019, 01:58 PM   #5
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Yep, I see the thermostat and fused power...gonna bypass thermostat and test now.
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Old 05-15-2019, 02:25 PM   #6
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Ok, fan(s) work...now to see if thermostat works.

Thanks a bunch for walking me thru this Old-Biscuit!!!

BTW - I could feel some warm air coming up but it wasnít the volume or velocity I would expect. Now I know why people add additional fans!
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Old 05-15-2019, 04:48 PM   #7
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Ok, so the thermostat is bad. I'm thinking of replacing it with one of the ambient temperature set switches (85 deg) from RV Cooling Unit Warehouse. I'm also thinking of adding a couple of their fans. Thoughts?
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Old 05-15-2019, 05:24 PM   #8
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Airflow is critical to cooling unit function


Add fans up top so they pull air in lower vent.....UP thru absorber tubes and across Condenser then blow air out upper vent


Baffle(s) are good for directing the airflow
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Old 05-15-2019, 08:53 PM   #9
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Quote:
Originally Posted by tankcj View Post
Ok, so the thermostat is bad. I'm thinking of replacing it with one of the ambient temperature set switches (85 deg) from RV Cooling Unit Warehouse. I'm also thinking of adding a couple of their fans. Thoughts?
Honestly, I would (and probably will), buy a ARP unit, with their fans.
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Old 05-15-2019, 09:43 PM   #10
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Quote:
Originally Posted by 96 Wideglide View Post
Honestly, I would (and probably will), buy a ARP unit, with their fans.
Yeah, I've been thinking about the ARP but wanted different fans....then I need to install a relay....just one more thing to do....
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