Which PTC is needed?
Answer Hello Tbone. You need to order WR07X10086 for the PTC and WR08X10061 for the overload.
What does the Rtc Relay do? I put in a new fan and it will not come on when compressor gets hot.
Answer Hello Sue. the relay WR07X10086 is used to start the compressor. If there is no power coming to the fan motor, you will need to order and replace the main control board WR55X10942 in the unit. You can test this with a multi-meter TJMA-DMT3. Here is a link on how to use a multi-meter. http://forum.appliancepartspros.com/oven-repair-including-ranges-cooktops/4810-how-check-continuity-ohmmeter.html