This is not one of the new Polar series model cooling unit. This unit will not fit or work for the NAX841 model. NXA841 is the old style and the NAX841 is the Polar series completely different LP Burner area, the cooling unit looks the same..
This unit using the AC Electric heating element that has the 45 degree bend.
Now, from RV Cooling Unit Warehouse, the Norcold Brand-new Cooling Units. We are the only source in the USA that offers the cooling units that are built by the Amish Refrigeration Manufacturer.
These cooling units are completely re designed to the Amish specs. Using some of the special Ammonia formulas and tubing design that they have used in the manufacture of the Home refrig and freezer line after many, many years of testing. Since they have the Home units to the high performance needed for the Home, they started to use the same specs for the RV cooling units.
They also use the special formulas in the re man units we sell, but go a large step forward when they changed the design of the original Norcold Brand-new cooling units to give that extra cooling performance needed to give the long lasting cold during the hottest weather that RV's run in to. The old original Norcold design is good, more for the short term use in moderate temp weather. If you have to replace the cooling unit WHY not replace it with the cooling unit that will give the cold that you are looking for.
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