The main power control board assembly in an LG dishwasher controls the distribution of electricity to various components based on the selected cycle and settings. It makes sure your dishwasher operates correctly during its washing and drying phases.
If your dishwasher fails to start, displays an error code related to the control board, or loses functionality, replacing the main power control board may resolve the issue.
Common Symptoms of a Faulty Control Board
If you’re unsure whether the main power control board is the issue, watch for these common signs:
- Dishwasher won’t power on: A completely unresponsive dishwasher often points to a failed control board.
- Error codes: Specific error codes related to electrical issues may display on the control panel.
- Interrupted cycles: The dishwasher may stop mid-cycle or fail to complete a selected program.
- Inconsistent performance: Some components, like the water pump or heating element, may not operate as intended due to communication errors.
Tools and Materials You’ll Need
- Replacement main power control board assembly (compatible with your LG dishwasher model)
- Phillips screwdriver
- Flathead screwdriver
- Adjustable wrench
- Pliers
- Tape
- Towels
Verify Part Compatibility
Before replacing the main power control board, make sure you have an OEM part compatible with your specific LG dishwasher model. Follow these steps to locate the model number:
- Find the Model Number: Look for a sticker or metal plate with the word “MOD” or “Model.” Typical locations include:
- Inside the door frame or on the side panel
- On the back or bottom of the dishwasher
- On the control panel or console
- Document the Model Number: Write it down or take a clear photo for reference.
Follow Safety Precautions
Before starting the replacement, prioritize safety to prevent accidents and damage.
- Unplug the dishwasher or switch off the corresponding circuit breaker to eliminate electrical hazards.
- Shut off the water supply at the valve to avoid leaks during disassembly.
- Use towels to absorb any residual water when removing parts.
- Make sure the area is well-lit and free of clutter.
- Keep children and pets away to maintain a safe workspace.
- Allow the dishwasher to cool if it has recently been used.
- Work gently to avoid damaging parts or causing injuries.
- Use insulated gloves to protect your hands from sharp components.
- Avoid touching exposed wires or terminals. Use non-conductive tools when necessary.
- Safety glasses or a dust mask may help if working in dusty or debris-filled conditions.
- Check for any manufacturer-specific instructions related to safety or the replacement process.
How to Replace the Main Power Control Board Assembly
Preparation
- Turn off the dishwasher and unplug it from the power supply.
- Disconnect the water supply to the dishwasher.
- Open the dishwasher door fully.
Remove the Outer Door Panel and Control Panel
- Remove the screws that hold the outer door panel in place.
- Carefully pull the outer door panel off.
- Remove the screws that secure the control panel.
Disconnect the Wires and Remove the Old Control Board
- Take a photo or note the orientation of the control board wires.
- Disconnect the wire harnesses connected to the display board, the light display wire harness, and the power switch connector.
- Disconnect the remaining wires attached to the main control board.
- Remove the screws securing the control board to the panel.
- Depress the tabs to release the old control board and pull it out.
Install the New Control Board
- Align the new control board on the panel and snap it into place.
- Secure the new control board with screws.
- Reconnect all the control board wires and secure them with the retainers to prevent loose connections.
- Reconnect the power switch connector, the light display wire harness, and the display board wire harnesses.
Reassemble the Panels
- Reposition the control panel and secure it with screws.
- Reinstall the outer door panel by aligning the slots in the panel with the tabs on the bottom of the control panel.
- Secure the outer door panel with screws.
Final Steps
- Plug the dishwasher back in.
- Turn on the water supply to the dishwasher.
- Turn the dishwasher on and run a test cycle to confirm proper functionality.
Tips for Extending the Lifespan of Your Dishwasher
To keep your dishwasher and its components running efficiently for years to come, consider these maintenance tips:
- Clean the filters regularly: Remove and clean the filters to prevent clogs and strain on the system.
- Inspect wiring connections: Check for frayed or loose wiring that may lead to electrical issues.
- Use appropriate detergents: Use dishwasher-safe detergents to prevent buildup and corrosion.
- Run the dishwasher regularly: Running the appliance at least once a week helps keep components from seizing up.
- Check for leaks: Periodically inspect hoses and connections for signs of water leaks to avoid damage.
When to Call a Professional
If the replacement process seems too complex or you encounter unexpected issues, it may be better to call a professional technician. Situations that may require expert help include:
- Unidentified electrical faults: If the issue isn’t resolved after replacing the control board, additional components may be malfunctioning.
- Wiring concerns: Handling or diagnosing wiring problems can be risky without proper training.
- Tool limitations: If you lack the tools or space to complete the replacement safely, a professional can ensure the job is done correctly.
So, there you have it—replacing your LG dishwasher’s main power control board isn’t as scary as it might sound. With the right tools, a little patience, and some careful wire wrangling, you can breathe life back into your dishwasher without calling in the pros.
But here’s the catch: your dishwasher is smarter than it looks. If things still aren’t running smoothly after the swap, there might be more going on behind the scenes—like sneaky wiring issues or other faulty components. Don’t sweat it. Knowing when to call in a technician doesn’t mean you’ve failed; it means you’re smart enough to avoid bigger headaches.
Whether you tackle it yourself or get a helping hand, the goal is simple: keep those dishes clean and your sanity intact. And hey, next time your dishwasher acts up, you’ll know it’s probably not just throwing a tantrum—it’s a power control board issue waiting to be fixed.