Screen says PF after use and smells hot, what is PF?

Screen says PF after use and smells hot, what is PF?

I have a GE Microwave Oven WES1450DS1BB.

ANSWERS:

"The PF error code means that either you magnetron is going bad and leaking microwaves, or the control board itself is bad.

I wouldn't touch this with a pole. It's to dangerous to work on. Either call a tech (it's not that expensive a model, or trash it. It would be prudent to just replace it."