PTC heaters are a type of electric heater that uses a positive temperature coefficient (PTC) to create heat. The PTC Heaters element is made of a material that has a high resistance when it is cold and a lower resistance when it is heated. When the element is cold, the current flowing through it is low, so the element only produces a small amount of heat. As the element warms up, its resistance decreases and the current flowing through it increases, so the element produces more heat. The PTC element is self-regulating, so it will only produce as much heat as is needed to maintain the desired temperature.