I've got an older drop in electric GE range, model #JDP37G0L3BG. I'm not sure how old it is since it was in the house when I bought it. Started getting an F3 error code, happens before it starts to heat up, about 15 seconds after turning the oven on. Thanks to the knowledge found on this forum, I tested the oven temp sensor. It tests around 1080 ohms so that's good. I tested the wiring going up the the control board and that tests good. The problem seems to be this little piece of wiring that attaches to the control panel and the temp sensor wiring. I've been told it's a diode so I tested with a multimeter on the diode setting. I tested both polarities and get OL on both directions. I can't seem to find this little part anywhere. Or where to buy diodes in general. I wasn't sure if diodes had set values like resistors do. On the diode itself reads "TCO D103 104C". I've googled that and no luck. Can anyone offer help finding this part? Thank you.

I went to sears and they found a part number for me that's calling it a thermal fuse. Here's the link:
http://www.********************...=0&shdPart=WB27X0545

Does anyone know the size of the fuse? I'm thinking I could solder one in for much cheaper than $50. Any ideas?