ETS EC125 Sander Failure; Electronics Fried with Light Use

Jim E.

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Joined
Nov 4, 2016
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8
Just wondering if anyone has had their ETS EC 125 or 150 sanders fail?  I'm a hobbyist, and my 4 to 5 year old 125 has had light use with it always plugged into my CT Midi.  The other day, all was fine when suddenly a huge spark flew out of the housing and I got the burned electrical odor, and of course, the sander quit working.  I knew something fried inside.  Sent it in to Festool, and they promptly diagnosed it with both electrical boards failed.  In total, repairs cost $269, and they didn't even charge me for one of the two electrical boards ($158 each).  While I appreciate Festool's quick diagnosis and repair, I'm troubled that the sander failed at all - as I bought it new, and it's never been wet or otherwise abused.  I have no idea why it failed - ideas?? - perhaps a stray voltage spike?  From my research, these sanders seem to be reliable.  Thanks in advance.
 
I think no matter the tool or brand there will always be "that one occasion" something fries or dies unexpectedly for no apparent reason.

After having a multitude of cheaper tools die, I've built up a fairly large Festool collection, and in over 40+ years of owning them I've only ever had one tool fail, which was the controller on my RS2E sander some 30+ years back, which I suspect was due to the erratic mains supply we used to have, but I'll never know for sure.

I have been using it ever since without issue, so I take it with a grain of salt that these things can and do happen. But with Festool, for me it's noticeably rare.
 
It's worth checking your power supply where the Vac and Sander run. Voltage Spike can be sneaky, and often takes out a board.
I lost the circuit board on my Small Dust Collection unit that hangs from my Shop Ceiling. Company sent me a new board and recommended a surge protector type device be installed upstream of the unit to prevent another board failure. I did that and have never lost another board on that unit.
For  Festool Vacs and Sanders, I haven't seen much board failure other than some people running into Static electricity taking out electronics. For them, it was often a question of if anti-static hoses were being used or some other hose that wasn't AS rated.  Or did they have a 3rd party dust cyclone in between the Vac and the Sander that wasn't grounded for Static that well... [scratch chin]
 
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