When a residential oven heats up but stalls out and refuses to get hotter than 250 degrees Fahrenheit, the malfunction is typically caused by a severely degraded or partially broken heating element, a failing gas igniter that lacks the electrical current required to keep the main safety valve fully open, or a miscalibrated temperature sensor probe. When an electric element develops a hairline fracture, it conducts limited electricity and produces minimal heat. You can troubleshoot heating limitations easily by inspecting elements. You can verify that your corrective action is successful when replacing a cracked heating element, a weak gas igniter, or a faulty sensor probe allows the oven to heat up rapidly to high baking temperatures.
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