CONCERN: Customer reports Whirlpool upper Oven is not heating. Model RBD305PDB4 CAUSE: Tested wall receptacle for proper voltage, line voltage at wall receptacle is normal. Inspected oven cord and terminal block for wear or electrical shorts. No signs of electrical short at power cord or oven terminal block. Inspected oven bake element terminal and found Oven bake element terminal failure. CORRECTION: Replaced oven bake element and tested. Operation now normal. Lake Pleasant/Beardsley In Peoria AZ