MacBook Pro A1229

pigoo3

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2017 15" MBP, 16gig ram, 1TB SSD, OS 10.15
This is not nearly enough info to help you out in this situation. Since we have almost no idea what you are really trying to do…or state of affairs this MacBook Pro is in the moment (working, not working, a pile of parts, etc.).

But assuming it is working…watch some You Tube videos. This will usually increase the rpm's of the fans.

- Nick
 
C

chas_m

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Why do you think you need to test the fans might also be some helpful information.
 

bobtomay

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15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
You don't have a multimeter and the fan is:

making noise - replace it.
not spinning - replace it.

In fact, if either of those are happening and you do have a multimeter:

I would replace it.

Actually, in all the years of building computers, I have never had an occasion to "test" a fan.
 

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