Oven heats but does not reach the set temperature or takes excessively long to preheat.

Safety first: Disconnect power before testing elements or sensors.

• Verify with thermometer: Place an oven thermometer in the center of the oven and compare actual temperature to the set temperature.
• Inspect bake element: Check for cold spots or uneven glow (for visible elements). Test for proper resistance; replace if suspect.
• Check door gasket: Inspect the door gasket for tears, gaps, or flattening. Replace if it does not seal evenly all around.
• Test temperature sensor: Measure sensor resistance at room temperature and compare to spec. Replace if out of range.
• Calibrate control: Use the oven's calibration feature (if available) to adjust the temperature offset according to the user manual.