How do I troubleshoot my oven?

To troubleshoot your oven that is not heating, not starting, or baking unevenly, follow a systematic approach to identify the failure. First, check power supply: ensure oven is plugged in, clock display lit, circuit breaker not tripped, for electric ovens you need 240 volts from two breakers, test outlet with multimeter, for gas ovens ensure gas valve open and you smell no gas leak. Second, check door and control settings: ensure door fully closed and latched, check if control lock is activated by holding Control Lock for 3 seconds, check if Sabbath mode or demo mode is on, ensure clock set after power outage as many ovens will not start until clock set. Third, identify symptom: if oven does not heat at all, check heating element for visible break or blister on electric models, or check if igniter glows on gas models, if no glow, igniter failed. Fourth, check temperature accuracy: if oven runs hot or cold, test temperature sensor with multimeter, it should read about 1080 ohms at room temperature, if not, replace sensor at 20 to 30 dollars. Fifth, check for error codes on display like F3E0 for sensor, F9E0 for door lock, or F1E0 for control board, and look up manual. Sixth, perform hard reset: unplug oven for 5 to 10 minutes to clear control board glitches. Seventh, check thermal fuse that may have blown from overheating. If basic checks fail, call technician.