My Edge Oil shows an OPEN message. What does it mean?

The OPEN message means the Edge Oil has detected a sudden drop in temperature. The product then stops automatically to prevent unnecessary heating, for example when a window is open.

If the temperature drops by about 5 degrees within 10 minutes, the product assumes that a window or door is open. You will hear a beep, the function symbols will disappear and OPEN will appear on the display. Press any button within 1 minute to keep the current settings. If you do not, the product will switch to standby. Then press the power button to reactivate it.