Oven temperature is consistently too low or too high compared to the set temperature.

Safety first: Allow the oven to cool before removing panels or racks.

• Verify with thermometer: Place an accurate oven thermometer in the center of the oven. Preheat to 350°F and allow at least 20 minutes of stabilization. Compare the reading to the set temperature.
• Check multiple cycles: Repeat the test a few times to confirm consistent offset (e.g., always 25°F low).
• Use control calibration: Many BlueStar electronic models allow temperature offset adjustment in the settings menu (e.g., ±35°F). Adjust according to the measured difference.
• Inspect sensor and gasket: Check the sensor for secure mounting and the door gasket for gaps or tears. Replace the gasket if it does not seal evenly all around.
• Replace sensor if needed: If calibration cannot correct large errors, replace the oven temperature sensor with the correct BlueStar part.