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Yes both should power on when you turn on the esc. Did the fan ever work or was it DOA?The one on the esc starts running as soon as you turn the truck on but the one on the heat sink on top of the motor doesn’t. Is it supposed to run all the time the same as the esc fan?
I could see that stock fan crapping out also.
If thats the case I recommend ditching the heat sink and go for a powerhobbies fan mount with a 30x30 or 35x35 surpass hobby rocket fan (really any of the aluminum high speed fans are about the same thing) About a $30 total investment but worth it. I simply cannot get my motor hot with it.
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