moaning HVAc fan noise

[neanderthal]

yesterday my fan started making a moaning noise while it was running. it was set to auto. at first i thought it was the drivetrain but quickly realised it was the fan as the noise abated when i turned it off.

the fan does not make that noise when its set to "high." it will make the noise when that fan is going slowly. and when i turn the car off it will make the noise too as the fan decelerates to a stop.

bearings in the fan? possesed fan? do i need to sacrifice a yugo to the automoticve gods? thnaks for your help guys.

i did do a search for moaning noise, and fan noise and couldnt get good stuff from prior posts.