I do not know if I need to replace it since it still has a reading. Under the resistor is black and looks burned. This resistor comes from a board in a soldering station with a built-in power supply. I open it up because I lost the ability to change the voltage on the power supply. It is the only part that looks broken. I should be able to remove it and test it once I find my old soldering iron. I will try to get you the reading as soon as possible. Thank you for your help so far.