Bush oven shows E18 and the grill or oven cycles off prematurely, not reaching set temperature.

Safety first: Isolate the oven from mains before accessing the sensor or thermostat.

• Verify temperature: Use an oven thermometer to compare actual temperature to the set temperature. If the oven is significantly cooler, suspect sensor or thermostat issues.
• Check sensor mounting: Ensure the sensor probe is firmly fixed in its bracket and not hanging loose, which can cause incorrect readings.
• Test sensor resistance: Remove the sensor and measure resistance at room temperature and at a known higher temperature (e.g., in warm water, if removable). If readings are inconsistent with specifications, replace the sensor.
• Mechanical thermostat: For models with a capillary thermostat, check that the sensing bulb is correctly positioned and not touching the element directly. Replace the thermostat if it does not switch reliably.
• Recalibration: Some electronic Bush ovens allow minor temperature offset adjustment in settings. Refer to the manual to adjust if needed after hardware checks.