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Drill suddenly running overspeed


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I have a brushless (just gave it to my boss, so don't remember the model) 18V drill that has suddenly started running way too fast. A coworker almost burned it out driving a few screws, it got way too hot doing almost nothing. I tried searching for the problem online, but found nothing. It's WAY too fast and very noisy!


Anyone else had this problem? Anyone know what's happend?



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Output is constant and maxed out. Either the driver transistor has shorted out or a sensor on the control board failed. Replace boards in it but frankly with prices what they are it’s scrap.

Normally the control board limits and controls voltage/current so it will crank it up if it gets loaded down then back off when it is up to speed. In your case it’s not doing this anymore.

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