Bush oven overheats and burns food even at low settings, no error code shown.

Safety first: Disconnect power immediately if the oven overheats uncontrollably.

• Inspect sensor or thermostat bulb: Ensure the sensor probe or capillary bulb is correctly mounted and not touching an element directly.
• Test thermostat contacts: With power off, remove the thermostat and check that contacts open and close as the knob is turned. If permanently closed, replace the thermostat.
• Test sensor resistance: Measure resistance at room temperature; if extremely low or shorted, replace the sensor.
• Check selector wiring: Ensure the selector switch is wired correctly and not feeding the element directly without thermostat control.