LG Dishwasher IE Error Code: Water Inlet Error

The LG dishwasher IE error code signals a problem with water entering the appliance. This comprehensive guide will walk you through troubleshooting steps, from simple checks to more advanced diagnostics.

Understanding the LG dishwasher IE error code:

The IE error code indicates that the dishwasher’s control board isn’t detecting water flow. This can be caused by various issues, from a simple kinked hose to a faulty component.

Initial checks (easy fixes):

Before diving into complex troubleshooting, start with these simple checks:

1. Water Supply:
   • Fully Open Faucet: Ensure the water supply faucet under your sink is completely turned on.
   • Water Pressure: Low water pressure can prevent proper filling. While a precise measurement requires a gauge, you can check your home’s overall water pressure by observing other faucets. If they’re also weak, contact a plumber. Ideally, water pressure should be 20 PSI or greater.
2. Hose Inspection:
   • Kinks, Pinches, or Crushes: Carefully inspect the water supply hose for any kinks, pinches, or crushing, especially behind the dishwasher and under the sink. Straighten any bends.
3. Inlet Hose Filter:
   • Blockages: Turn off the water supply and disconnect the hose from the water inlet valve on the dishwasher. Check the small filter screen inside the inlet valve for debris or calcium buildup. Clean it gently with a brush or by soaking it in vinegar. If calcium buildup is excessive, consider installing a water softener system.

Advanced Troubleshooting (If Initial Checks Fail):

If the LG dishwasher IE error code persists after the initial checks, proceed with these more detailed steps:

1. Flow Meter Check (Water Wheel):
   • Water Entering the Unit? If water is entering the dishwasher, observe the flow meter’s water wheel (inside the dishwasher, where the inlet hose connects). Is it spinning freely? If not, the flow meter needs replacement.
   • Voltage to Flow Meter: If the water wheel spins freely, check for 5V DC (direct current) at the flow meter connector.
     • No voltage at the main PCB? If there’s no voltage at the Main PCB (Printed Circuit Board) connector for the flow meter, the Main PCB likely needs replacement.
     • Voltage at Main PCB, but Not at Flow Meter? A wiring harness issue is likely the cause. Check for continuity in the wires between the main PCB and the flow meter.
     • Voltage Present at Flow Meter: If voltage is present at the flow meter, check for a 5V DC pulse signal being sent from the flow meter back to the Main PCB when water is flowing. If this pulse isn’t present, the flow meter is faulty.
2. Water Inlet Valve Check (If No Water Enters):
   • Voltage to Inlet Valve: If no water is entering the dishwasher, check for voltage at the water inlet valve connector.
     • No voltage at the main PCB? If there’s no voltage at the Main PCB connector for the inlet valve, the Main PCB needs replacement.
     • Voltage at Main PCB, but not at Inlet Valve? A wiring harness issue is likely. Check for continuity in the wires between the main PCB and the inlet valve.
     • Voltage Present at Inlet Valve: If voltage is present at the valve, the valve itself is likely faulty and needs replacement.
   • Resistance Check (If No Voltage): If no voltage is present, measure the resistance of the inlet valve using a multimeter.
     • Expected Resistance: The resistance should be within a specific range depending on your model.
       • 120V AC Models: 900-1300 ohms
       • 8-12V DC Models: 20-30 ohms
     • Incorrect Resistance: If the resistance is outside the expected range, replace the inlet valve.
     • Correct Resistance: If the resistance is correct, the issue is likely a wiring harness problem.

Important Notes:

• Safety First: Always disconnect power to the dishwasher before performing any electrical checks.
• Multimeter Required: You’ll need a multimeter to perform voltage and resistance checks.
• Model Specifics: Consult your dishwasher’s service manual for specific voltage and resistance values, as they can vary by model.

By following these steps, you should be able to diagnose and resolve the LG dishwasher IE error code. Remember to proceed cautiously and seek professional assistance if needed.