Re: The overheat alarm system question

[frankr]

So,was it actually overheated (smoke, burnt paint)? Sounds more like a piston failure from some other cause.

But yes, I’ve seen lots of motors suddenly overheat from total and instant cooling failure at high speed, like impeller hub separation or plastic bag. They burned the paint and melted wires, and the alarm never went off. It all happened so quickly that the sensor didn’t react till it was too late.