Oven heats but does not reach or maintain the set temperature; food undercooked or overcooked.

Safety first: Turn off power before accessing internal components.

• Verify with thermometer: Place an oven thermometer in the center of the cavity and compare actual temperature to the setpoint over several cycles.
• Inspect door seal: Check the oven door gasket for gaps, tears, or compression. Replace if damaged to prevent heat loss.
• Test sensor or thermostat: On electronic models, measure the oven sensor resistance and compare to Gram's temperature/resistance chart. On mechanical models, test the thermostat contacts for proper opening/closing at temperature (requires specialized tools).
• Calibrate control: Some EOCs allow temperature offset adjustment in the user or service menu. Adjust within the allowed range if the oven is consistently off by a similar amount.
• Replace faulty component: If calibration cannot correct the issue, replace the oven sensor or thermostat as appropriate.

Warning: Avoid bending the sensor excessively; it can be damaged internally.