Noctua NF-F12 Fan Install/Wiring For Frige

Thanks Gordon and Landyacht, I should be good to go now.

My fan came with a 12 inch extension. going to cut and splice on the end of it and keep the plug in tact on the fan.

Also learned a new term, "snap switch."

I had the same problem identifying which wires were just + and -, and E mailed Noctua. They linked a page showing where they list what is what, but now I cannot find it.

But not wanting to pull out my fridge to check, I found it elsewhere online and yellow is + and black is -

In October mine will have been mounted on my compressor fridge's condenser for 5 years, and my fridge rarely has seen voltages less than 12.1v and daily sees mid 14's. I am not sure what voltage the compresor controller allows to the fan though, the fridge can run on 12 or 24v but they say to use a 12v fan so the fan voltage is likely regulated to 12.0v and does not vary with battery voltage.

I have other Noctua fans, 60mm and 80mm, which have spent many hours up in the high 14's and occassionally higher when EQing a flooded battery, and even more time at 13.6v. I'd not stress the charging voltages, and at just 0.05 amps, I'd not really bother with a thermostat for it. but a snap switch would be what I would choose if I did.

https://www.amazon.com/Emerson-3F05-1-Adjustable-Snap-Control/dp/B000PY7T7I/ref=sr_1_3?ie=UTF8&qid=1492880656&sr=8-3&keywords=snap+switch

The Noctua NF-f12 fan comes with two low noise adapter cables. If you want to keep the sleeved connector on the fan's lead, then I would sacrifice one LNA cable and cut and splice the wires on it, not including the resistor mid LNA cable.

The LNA's have a simple resistor on the power cable to reduce the voltage and slow the rpm's. I use them on a loud 'Addo' fan I pulled from a failed Wfco that pulls much more current ~ .22 amps at 12.6v, and while the resistor gets hot, not dangerously so. That fan exhausts my electrical cabinet and can also help vent my fridge if I choose to retain condenser heat inside( compressor fridge, no byproducts of combustion), otherwise I expel it outside vehicle instead.

I'm sure someone will come along and correct me shortly, but I'll take a stab.

Yellow will be your +12, black is ground. The two blue wires are tachometer output and speed control input. Fan should run at full speed without a speed control input. If it doesn't, you'll need to consult the instructions as to what sort of signal it's looking for.

Sounds like this a computer fan. Depending on if the chips inside are weak or not, it might not like the higher voltages an RV runs at compared to the smooth regulated 12.00 volts from a quality computer power supply. Someone else will likely correct me on that statement as well.