A clicking sound from your LG dishwasher often signals an issue that requires attention. While some clicks are normal operational noises, persistent or loud clicking usually indicates a problem with internal components, most commonly the water pump.
Primary Cause: The Water Pump
The water pump is a crucial component in your LG dishwasher, responsible for circulating water throughout the wash and rinse cycles to clean your dishes effectively. If this part becomes clogged or damaged, it can lead to noticeable noise when water is actively moving.
The noise typically manifests as a loud whirring or clicking sound and is most prevalent during the wash or rinse cycles. This happens because:
- Debris Obstruction: Food particles, broken glass, or other small objects can get lodged in the pump's impeller, causing it to hit these obstructions as it spins, resulting in a clicking noise.
- Component Wear and Tear: Over time, the pump's motor or impeller bearings can wear out, leading to mechanical friction and a clicking or grinding sound.
- Improper Installation/Loose Parts: While less common, a loosely mounted pump or internal components can vibrate and click against other parts.
Other Potential Reasons for Clicking Noises
Beyond the water pump, several other components can produce clicking sounds in your LG dishwasher:
Spray Arms
The rotating spray arms distribute water inside the dishwasher.
- Obstruction: If dishes, cutlery, or other items are placed too high or improperly, they can block the spray arms, causing them to hit against items as they try to rotate.
- Debris: Food particles or small items can get stuck inside the spray arm nozzles, disrupting water flow and potentially causing imbalance or unusual sounds.
Foreign Objects in the Drain or Sump Area
Small, lightweight items can fall to the bottom of the dishwasher tub and end up near the drain or pump area.
- Examples: Tiny plastic pieces, bottle caps, small bones, or even a piece of cutlery can get caught in the impeller or rub against moving parts, creating a distinct clicking or rattling sound.
Detergent Dispenser
A single, sharp click at the beginning of the wash cycle is often the detergent dispenser opening. This is a normal operational sound, but if it sounds unusually loud or repeated, it might indicate an issue with the dispenser mechanism.
Inlet or Drain Valves (Solenoids)
Dishwashers use electrically controlled solenoid valves to open and close, allowing water to enter (inlet valve) or exit (drain valve) the tub.
- Normal Operation: These solenoids can make a distinct clicking sound as they energize and de-energize to control water flow.
- Malfunction: If a solenoid is faulty or sticking, it might make louder or irregular clicking noises.
How to Troubleshoot and Fix the Clicking Sound
Addressing the clicking sound often involves a few systematic checks:
| Cause | Solution |
|---|---|
| Clogged/Damaged Water Pump | Clear debris from the sump/filter area. If noise persists, professional inspection/replacement may be needed. |
| Spray Arm Obstruction | Rearrange dishes, ensure nothing is blocking rotation. Check and clear spray arm nozzles. |
| Foreign Objects | Carefully remove any foreign objects from the drain filter, sump, or pump area. |
| Detergent Dispenser Malfunction | Observe if the click is excessive or if the dispenser isn't opening correctly. May require replacement. |
| Faulty Solenoid Valves | Listen for timing. If suspect, professional diagnosis is recommended. |
Step-by-Step Troubleshooting Guide:
- Safety First: Always unplug your LG dishwasher from the power outlet before performing any inspections or maintenance.
- Inspect Spray Arms: Manually spin both the upper and lower spray arms to ensure they rotate freely without hitting any dishes or rack components. Clear any visible blockages in the nozzles.
- Check for Foreign Objects:
- Remove the lower dish rack.
- Locate and remove the drain filter assembly at the bottom of the tub.
- Carefully inspect the sump area (the basin below the filter) for any debris or foreign objects that may have fallen in. You might need a flashlight and gloves.
- Listen to the Timing:
- If the clicking occurs only once at the start, it might be the detergent dispenser.
- If the clicking or whirring happens throughout the wash or rinse cycles, it points strongly towards the water pump or something interacting with the water circulation.
- Examine the Water Pump (Advanced): If you are comfortable, you can try to inspect the water pump's impeller for obstructions or damage. This usually involves removing the filter and possibly some internal components. If you're unsure, it's best to call a professional.
- Consult LG's Resources: For specific troubleshooting unique to your LG model, refer to your appliance's user manual or visit the official LG Support Website for guides and FAQs.
When to Call a Professional
If you've performed basic troubleshooting and the clicking sound persists, or if you notice other issues like leaks, poor cleaning performance, or error codes, it's advisable to contact a qualified appliance repair technician. Issues involving the water pump motor, complex valve replacements, or internal electrical components are best handled by experts to prevent further damage.
