If there is no bake or broil most likely the thermal fuse is blown Part number: 3196548
It's not very clear where is it (the diagram is not the best) but I think you should look under the top, behind the door latch. the video clip take you to the back of the range...you may check it too.
Here are the breakdown diagrams and Chassis parts for Whirlpool WFE381LVS1 - AppliancePartsPros.com
Good luck. Post the results.