One of the common problems of all types is microwave - not heating. Typically problem could be in diode. The diode converts the A/C power output of the transformer to D/C, doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron to heat the food. If the diode burns out, the magnetron won’t receive enough voltage to operate, preventing the microwave from heating. When the diode fails, it is often visibly burned out. Inspect the diode and if the diode is burned out, replace it. Today we have prepared a guide, which helps you to replace diode in microwave LG lm1683st.
Unplug the appliance’s power cord. Remove the glass tray and support from the oven cavity. Have an assistant help you to support the microwave as you unthread the screws securing the top of the microwave to the cabinet. Carefully tilt the appliance down and pull the power cord through the hole in the cabinet. Lift the microwave off of the mounting plate and set it on sturdy surface so its resting on its rear panel. Unthread the screws securing the oven’s bottom panel. Disconnect or detach any turntable motor or light wires secured to the panel and set the panel aside. Set the microwave oven upright and support the front with a 2×4 piece of wood. Open the door and unthread the screws securing the venting. Fully remove the venting (you might be able to use a putty knife to make this easier). As applicable, unthread the screws on the side, top, and rear securing the cover to the frame. You may also need to unthread the screws to remove the blower cover or air damper. You should now be able to slide the microwave’s cover back to remove. As noted earlier, be sure to discharge the potentially stored electrical charge in the capacitor.
Unthread the screw securing the old diode to the frame and detach it from the capacitor terminal. Install the new diode by attaching the appropriate end to the capacitor terminal and threading the screw to secure the grounding end of the diode to the frame. Reinstall the cover along with the blower cover or air damper, as necessary. Replace the venting and secure it with the screws. Tip the microwave back on its rear panel. Reinstall the bottom panel by first reconnecting/reattaching the turntable motor or light wires, then fully align the panel and secure it with the screws. Carefully reposition the microwave oven on the tabs of the mounting plate. Feed the power cord through the hole in the cabinet. Lift the appliance up and rethread the screws to secure the top of the microwave cover to the cabinet. Replace the turntable support and align the glass tray on the motor coupler. Plug the power cord back in and your microwave oven should be ready for use.
Done! We know that isn’t simple, and if you need help with replacing diode, you can contact our customer support team and arrange an appointment at the convenient time.
