Need Help Identifying This DIODE mounted on a Frigidaire oven control PN:316131600

[DennisH]

This diode is mounted on a Frigidaire electronic oven control PN:316131600. This diode runs hot enough that the PCB is showing slight burn marks (black soot looking area on PCB above the diode). It looks to me to be coming from the body of the diode.

The oven control is 22 years old and still works, but I can't get a new replacement, so I'm doing preventative maintenance and replacing a few parts on it that I think could fail - and this is one of them.

Can any of you identify this diode (see pic) and suggest a replacement that can handle more heat - or if not, can you identify this one and tell me what to order to replace it? There is no other writing on it other than "231." It is actually very small - I zoomed in on it quite a bit.
Regards,
Dennis