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I just replaced the battery in the machine, verified all the connects a couple of times. One fan spins at full speed 100% of the time and I can’t figure out why. I tried all the standard resets too…any ideas?
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Likely the tach within the fan unit has encountered an issue. This could be the fan unit or the wiring to the logic board. Basically, the resistive load of the circuit is not correct.
I would start off replacing the fan unit as well as inspect the fan connection point on the upper case (under the logic board) and then following the connection to the logic board connection.
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Most likely that
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@beanman56 - I've changed my focus from repair to my second love photography, and a very narrow aspect which is a solo kind of thing.
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@gadietrich Try getting a new fan and checking the fan connector.
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Hmmm. Only one fan? Which fan, just out of curiosity? I would try 2 things. See if it spits out an error when you run diagnostics (press and hold D when you power on from off). I might also download something like TG Pro, there's a 14 day free trial, and see if you're getting any weird readings from sensors.
da Alisha C
@flannelist - Good diagnostics step!
da Dan
Did you try reseting the SMC and or NVRAM?
da Ben Capehart
So, here is where I'm at. I did all the resets, like SMC and NVRAM. I downloaded TG Pro like @flannelist mentioned. That all came back clean, no issues. The left fan though is running at 7000 RPM and the right fan is at 2000 RPM.
I started the machine up in a diagnostic mode and there it did say that something was up with the left fan. So not sure if this is an issue with the fan itself or the connection to the MLB/
da Greg Dietrich
i would try the fan MacBook Pro 15" Retina (Late 2016-2019) Left Fan
if not then this MacBook Pro 15" Retina (Mid 2018) 2.9 GHz Logic Board, Radeon Pro 560X, with Paired Touch ID Sensor OR MacBook Pro 15" Retina (Mid 2018) 2.6 GHz Logic Board, Radeon Pro 560X, with Paired Touch ID Sensor. OR MacBook Pro 15" Retina (Mid 2018) 2.2 GHz Logic Board, Radeon Pro 555X, with Paired Touch ID Sensor
Or its the ram that could cause that to happen
can you send a video of it starting up and the sound or a link to youtube or something
The problem with my 2009 macbook was the fan it wasn't going fast enough.
da Ben Capehart