A cold iron is no use at all. It can be easier just to buy a replacement, but in some cases the problem can be easily fixed. Follow the guide below to see if you can get it working again.
Most irons come with an adjustable temperature gauge - this is so that you can use hotter settings for 'Linen' and 'Cotton' items, than for pressing synthetic materials or delicate fabrics.
Irons use steam to remove creases and kinks. If the water tank is empty, the iron won't work properly.
The soleplate is the iron's flat, metal surface. If the soleplate vents become clogged with limescale, the iron won't heat or produce steam properly.