I purchased the new ETS EC 150/3 sander months ago. It never did handle very well from the start. Recently it kept shutting off right after I would power it up. I tried several things and it still wouldn't run. I sent it off to Festool. When it came back, the return form said they replaced the electronic modules. Tried my sander that day. It ran for a couple minutes then did the exact same thing. Shuts itself off.
I called Festool repair and he told me he had no idea what was wrong. I'd need to send it in so they could diagnose the problem. I said, "I just did that and you didn't fix it." He didn't seem to care. I asked him what happens if it does the same thing. He said, "I don't know. I'll have to talk to my boss about that."
Its a freaking $500 sander that won't work and they don't give a rip. I should have bought the new Mirka.
I think it's time to sell my Festools and move on.