Either the appliance doesn't stop working:

• Turn it off and turn the tweezers of the epilating head with your thumb until you can remove whatever is blocking the rotating tweezers. Switch on the appliance again.

Or the appliance stops working because the overload protection has been activated - the speed setting indications flash red. Check if the rotating tweezers of the epilating head are blocked by turning the tweezers with your thumb until you can remove whatever is blocking the rotating tweezers. Switch on the appliance again.