Possible Cause:
The power cord is not plugged in.
The device does not switch on.
The appliance is used on a voltage outlet over 120V, 60Hz.
Solutions:
Verify that the plug is securely inserted into the power outlet.
Long press the power button on the screen.
Unplug the cord and make sure the warmer is used under the rated voltage.
If the problem cannot be solved still, please contact the manual support.