SAFETY NOTICE: Be sure to
to the appliance before performing any repairs. Be aware that there could be sharp edges inside the appliance that could cause cuts or other injuries to yourself or others.
On something like this you will need to check the wiring connections at both elements first. If the wiring is good then you will more than likely need to replace the ERC (clock). The only way to confirm the diagnosis is to use an ohmmeter. Both oven elements should ohm out between 15 to 45ohms. Be sure the unit is disconnected from voltage & both wires removed before checking.
I am sending you access instructions from the service manual. Please click on the attachment below.
clock; 316207511 $154.99
overlay; 316220841 $21.97
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services