A soldering iron functions by heating up an element that transfers heat to the tip. A defective heating element will keep the soldering iron from functioning correctly and should be repaired. You can repair a malfunctioning soldering iron by replacing the heating element. This will restore the soldering iron to its normal functionality. A replacement heating element and a few hardware tools will be required. Do not attempt this repair if you are under age or without adult supervision.
Unscrew the handle from the back end of the soldering iron with your fingers. Pull the handle away from the soldering iron assembly.
Unwind the protective tape from around the soldering iron assembly with your fingers. Place the protective tape aside for use later on.
Twist the ends of the two connectors now revealed by having removed the protective tape with your fingers. Separate the two wires from the two connectors with your fingers.
Clip off the two metal lugs next to the two connectors with the wire cutters. Dispose of the metal lugs in the trash.
Twist the nut at the far end of the soldering iron assembly counterclockwise with the spanner wrench. Unscrew the nut with your fingers.
Unscrew the ring from the far end of the soldering iron assembly.
Clamp the jaws of the needle-nosed pliers around the heating element inside of the far end of the soldering iron assembly. Pull the heating element out of the soldering iron assembly with the needle-nosed pliers.Dispose of the heating element in the trash.
Brush out the far end of the soldering iron assembly with a steel brush.
Insert the replacement heating element, wires end first, inside of the far end of the soldering iron assembly. Screw the ring back onto the far end of the soldering iron assembly.
Separate the two leads at the end of the replacement heating element with your fingers. Hand tighten the nut at the far end of the soldering iron assembly. Tighten the nut with the spanner wrench.
Insert the two leads at the end of the replacement heating element into the two connectors of the soldering iron. Wrap the protective tape around the two connectors.
Screw the handle back onto the back end of the soldering iron.
Keeping the tip of the soldering iron clean and the body free of dirt will help to prolong the life of the tool.
Unplug the soldering iron before repairing the heating element.