New Makita grinder blew up????

Hi guys, I own a 125mm Makita grinder (GA5030R) . Got it 2 or 3 months ago.

I was using it with a wire brush, it heated up and stopped working.

It works but slowly and makes weird noises, smells a bit like burnt something.

What happened? Is this supposed to happen?

I got a Makita thinking I was buying something better than the cheap stuff you buy in supermarkets.

Thanks for any help

Might depend on the size of the wire brush, I personally only run a 3″(~75mm) wire brush on that size grinder.  If you’re running a 125mm or even possibly a 100mm wire brush I could see it being pretty hard on that size grinder.

I would take it back and either get a refund or a new tool.  Sounds like the overload protection didn’t kick in and save the tool.