Check that the plug is in the socket properly. Check that the bottle with heating element is in full contact with the base station. Make sure that the contact points on the heating element and base station are completely dry and that there is no limescale on the contact rings on the bottom of the element. If needed, you can clean the contact rings with a little bit of (cleaning) vinegar and the corner of a cloth.
You will need to press and hold the button for at least 3 seconds for the red light to start flashing. Check the parts for damage and replace any damaged ones. If you need help, please contact Difrax Customer Services using the contact form.