Weird humming sound from AC

[BlueThunder16]

This week I noticed a very noticeable hum coming from my AC which changes in intensity as I raise it from low to high. I not only hear it, but feel it vibrating somewhat through the interior. The AC blows ice cold other than that, and from the engine bay everything sounds normal from what I can tell. I pulled the glove box hoping it was just the blower motor going bad,.since that's an easy and relatively cheap fix. But when I had.my head under the dash with the AC on, the hum sounded like it was coming from the area next to the motor, not the motor itself. I made sure the cabin air filter and cavity were clean. No leaves or debris in there at all.

Any ideas of what this could be? I tried uploading a video I took, but it didn't work. I'm trying to figure that out. Thanks!

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[ORRadtech]

Check the motor speed control. They used to be called the blower motor resistor but I'm pretty sure they are electronic now.

 

[BlueThunder16]

Ok will do. Thank you.

 

[BlueThunder16]

Did some more reading ...I think I'm going to swap out both the blower motor and resistor. My gut from the start is telling me it's the motor, but for another $50 or so I'll swap out the resistor too. But before I order parts, I'm going to pull the motor out tomorrow and check if there is something stuck in there. Maybe I'll get lucky.

 

[ZXMustang]

Air cooled seat fans? My vented seats when on make a noticeable noise.

 

[BlueThunder16]

Couldn't wait til tomorrow...I just pulled out the blower motor and found this piece of whatever in there. Reinstalled it and it sounds perfect like it used to. Just saved $200 lol. I guess it's my lucky day!!!

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