Heat pump oscillating noise

[paulmars]

Is this varying pitch noise normal?

What is it anyway? It's a different noise then the fan spinning.

Cant attach, so listen to it here: https://streamable.com/nchs63

 

[Fitter30]

Top of the unit tighten the screws( don't try getting them super tight they will strip out) see if sound changes and take a pic of the top.

 

[Sponsor]

 

[paulmars]

Sound same after tightening.

 

[Fitter30]

Fan grill hold the fan motor loose the.grill screws and jam some card board between grill and case. Look at the fan blade position POWER OFF. Blade is sounded by a sheet metal tube blade should be center in the tube where the bottom edge of blade should be above the bottom edge of the tube 1/4" to 1/2". If it needs to be moved spray shaft with wd40 or penetrating oil. If the blade might need to be raised or lowered loosen set screw ( depends how hard they cranked down the set screw) adjustable wrench on shaft try to turn the blade just don't go big on it. Spray into set screw.

 

[paulmars]

I see no tube. This is a new unit just installed. Installer said it's fine, but Im not so sure. I also pressed on various parts including fan mount & grill mount.

 

[Fitter30]

Fan blade just turning in the free air doesn't do much. Put a sheet metal tube around the blade to spin in directs the air.