The Hakko A5002 Replacement Heater Cartridge is an accessory for use with the FX-8806 Soldering Iron Handpiece. The FX-8806 has 95W power and an ergonomic grip for use with the FX-888DX Soldering Station. Conducting maintenance of the handpiece will keep the product in good condition. Inspecting or replacing any internal components is necessary to prolong the usage of the unit. To prevent damage and injury, unplug the soldering iron from the station before inspection. If the resistance of the plug of the iron connection cord is abnormal, measure the resistance of the heating element. Replace the heating element if the resistance is not within a normal resistance of 1.9 to 2.6 Ω and if the sensor is not within a normal resistance of 41 to 58 Ω.