I don't know what kind of heater you use, heater generally according to the principle of the circuit heater does not work, nothing more than several aspects, one is the heating wire itself damage, this can be measured with a multimeter to heat the silk vegetables and fruits have been burned off if it is disconnected, it will definitely not be heated. In another case, the insurance is broken, and the heating element is not powered at all. Of course, there are other more complex situations, such as a problem with the temperature controller, a problem with the temperature sensor, and damage to the temperature protector, which are all possible, because generally speaking, the heater is not simply energized heating wire plus 1 switch and insurance on the line, but also have temperature control equipment, but also have. The detection equipment that transmits the temperature must also have temperature protection equipment, otherwise it will be a problem to keep heating.
