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VARISTOR how to KNOW if it is damaged EASILY In this video Tutorial we are going to see the Varistor or vdr which is an electronic component and we are going to know if it is damaged, the first thing we do is identify the varistor or resistor that depends on the voltage, we are going to explain types of varistors, what function it does in the circuit, how can we identify it, how can we know if it is in good condition, how to measure a vdr varistor, we are going to see what happens if the varistor short circuits, and after that we are going to see what we have to do to solve the problem, on the track side, we are going to identify the components that we have near it, fuse, thermistor, capacitors, resistors etc, and at the end of the video I have a trick to know with a 230v 25watt incandescent bulb, if the card is still shorted or if on the contrary it is already prepared to be mounted in the circuit, remember that you have to have a minimum knowledge in electricity and electronics, 14n511r, if you like the video do not forget leave your like thanks..