On electric ovens, the leading causes are a failed bake element ($150 to $280 replacement, the most common single failure), a failed broil element ($150 to $280), or a failed control board ($250 to $500). Diagnosis distinguishes: elements are visible and testable in minutes; control boards require model-specific diagnostic. On some electronic ovens, the temperature sensor has failed rather than the element or control board; this is a $120 to $200 replacement.
On gas ovens, the leading causes are a failed igniter ($180 to $320, and one of the most common gas oven failures) or a failed gas valve solenoid ($150 to $250). Both are diagnosable in the first visit. Igniters are considered wear items and typically fail at 8 to 12 years of moderate use, sometimes earlier in households that cook frequently.










