Display briefly shows 'Err' when setting temperature or time; the oven may reject input.

Safety First: No internal repair is usually needed for an 'Err' message unless it persists.

• Verify Settings: Ensure you are entering a valid temperature (e.g., 170–550°F) and the correct time format (hours and minutes).
• Clear and Retry: Press Cancel to clear the error, then re-enter the desired settings slowly.
• Power Reset: If 'Err' appears repeatedly, turn off the breaker for 5 minutes, then restore power and test again.
• Check Keypad: If certain keys always trigger 'Err', the touchpad / control panel may have a stuck or shorted key and should be replaced.