I plugged a portable heater (de longhi) into an extension cord, and now its not working?

What should I do? I plugged it into the wall but it still is not working or:What should I do? I plugged it into the wall but it still is not workingor

What should I do? I plugged it into the wall but it still is not working

or:What should I do? I plugged it into the wall but it still is not working

or:There is a switch on the bottom of a heater so it won't work if it is not sitting upright on a flat surface. Most extension cords are not good enough to power a heater. They will melt.

Tags:extension,