[mikeadiddle]

During the preheat cycle, the "heat" display and heat elements are turning on and off in roughly 30 sec intervals.
I can see the two relay switches on the electronic control panel (inside) clicking on and off, controlling this.
Cycle:
- They will both click on with "heat" on digital display.
- in apx 10 secs one relay (broiler) clicks off.
- in apx 10 secs the other (bake) clicks off, along with "heat" display.
- in apx 10 secs both replays click on with the "heat" display and the cycle starts over.
The elements are heating up in relation to the above.

Both elements have continuity.
Neither element has a short between the internal conductor and the outer sheath.
Temperature sensor has continuity and reads between 1000-1100ohms at room temperature.
Thermal Fuse has continuity.

[Gene]

Sounds like the problem is a bad Electronic range Control. Unfortunately this part is no longer available.

Here are the breakdown diagrams and Replacement parts for WHIRLPOOL RF376PXDN1 30" FREE STANDING RANGE | AppliancePartsPros.com

Gene.