Display shows ERR when pressing certain keys or trying to set the temperature or time.

Safety: No internal access is needed for basic troubleshooting.

• Clear entry: Press Clear/Off and re-enter the desired function following the user manual instructions.
• Check for stuck keys: Press each key individually to ensure it responds and is not physically stuck.
• Power reset: Turn off the breaker for 1–2 minutes, then restore power and test again.
• If specific keys never respond: The touchpad or glass control panel is likely defective and should be replaced.