Parts for Lg LRE30453ST/02: Controller Parts

Power transformer that supplies low-voltage power to the appliance control board and user interface, helping restore stable voltage to control circuits for reliable operation of displays and control functions. What it does:

• Steps down incoming mains voltage to the low-voltage level required by the control board and display.
• Replaces a failed transformer that can cause blank or dim displays and unresponsive controls.
• Can address intermittent resets, failure to start, or control-board power-loss symptoms when diagnosed as the faulty component.
• Works with the main control assembly to maintain stable voltage for sensors and interface electronics.

• Disconnect power at the breaker or unplug the appliance before starting any work.
• Handle the control board and connectors carefully; document or photograph wiring locations before removal.
• Reconnect all terminals securely; verify correct orientation and insulation to avoid shorts.

The Membrane Switch Assembly is the touch keypad for your appliance's control panel. It relays button presses to the electronic control, restoring reliable input when keys stop responding or a "stuck key" error prevents selecting functions.

• Provides the printed keypad used to choose settings and start/stop
• Sends each key press through its flat ribbon lead to the control board
• Common fix for unresponsive or intermittent buttons
• Can resolve "stuck key"/keypad error beeps or messages
• Useful when the display lights but buttons do not respond

• Disconnect power to the appliance before servicing.
• Access the control panel; note screw and clip locations for reassembly.
• Handle the ribbon connector carefully—do not crease it and seat it fully.
• If servicing a microwave, internal high-voltage components can retain a charge even unplugged.

A circular lug designed to join a stripped wire to a threaded terminal for a secure electrical connection. Helps restore reliable contact at terminals and reduces the chance of intermittent power or arcing at connection points. What it does:

• Provides a strong mechanical and electrical connection between a wire and a screw or bolt terminal.
• Helps prevent loose connections that can cause intermittent operation, sparking, or overheating.
• Commonly used where a ring-style termination is required for safe, stable wiring.
• Works with properly sized wire and fasteners to maintain consistent conductivity.

• Always disconnect power to the appliance before inspecting or replacing electrical parts.
• Use the correct lug size and gauge for the wire and terminal; crimp or solder per manufacturer recommendations.
• Tighten terminal hardware to the appliance manufacturer's specified torque; avoid over-tightening which can damage the lug or terminal.
• If wiring insulation or the terminal is damaged or corroded, replace the affected components rather than reusing them.