Rooftop AC bearing noise (loud)

[pilgrimwalker]

I have a 2014 HL North Trail, purchased used. The AC and the fan made loud bearing noise. After pulling the roof top covers off there were no "cups" for oiling the bearings. I put a few drops of oil on the bearings I could get too. I turned the fan on and off and oiled again. That seems to do the trick. It did not help to pull the interior metal plates off the roof top unit. I will carry oil with me from now on.

 

[danemayer]

Hi pilgrimwalker,

Welcome to the Heartland Owners Forum and thanks for the tip.

 

[NHCelt]

I have a 2014 HL North Trail, purchased used. The AC and the fan made loud bearing noise. After pulling the roof top covers off there were no "cups" for oiling the bearings. I put a few drops of oil on the bearings I could get too. I turned the fan on and off and oiled again. That seems to do the trick. It did not help to pull the interior metal plates off the roof top unit. I will carry oil with me from now on.

You can buy new fan/motor assemblies pretty cheap on Amazon or eBay. Quieter than oem...

 

[Flick]

I have a 2014 HL North Trail, purchased used. The AC and the fan made loud bearing noise. After pulling the roof top covers off there were no "cups" for oiling the bearings. I put a few drops of oil on the bearings I could get too. I turned the fan on and off and oiled again. That seems to do the trick. It did not help to pull the interior metal plates off the roof top unit. I will carry oil with me from now on.

You should think about replacing that fan assembly as suggested. Oiling it the in the manner you described is like putting a bandaid on it. When the original babbit wears out of the bushing , no amount of oil will fix the squalling in it’s future and it could go out or seize up at the most inopportune time.