Oven shuts off by itself before the set time or temperature is reached, without an error code.

Safety first: Disconnect power before inspecting electrical connections.

• 1. Check terminal block: Inspect and tighten all connections where the power cord or conduit attaches to the oven.
• 2. Inspect high-limit: Test the high-limit thermostat for intermittent opens by gently tapping it while monitoring continuity. Replace if unstable.
• 3. Cooling airflow: Ensure the cooling fan operates and vents are clear to prevent control overheating.
• 4. Control board: If power and safety devices are good, the main control board may be failing under heat and should be replaced.