Display briefly shows 'Err' when setting temperature or time; 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 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.