If your LG dishwasher is showing a 1E error, don’t panic—it’s a common issue and often easy to fix at home. This error means the dishwasher isn’t filling with water properly, usually within the first 10 minutes of the cycle.
The good news? In most cases, the solution is simple and doesn’t require tools or technical skills. This guide will walk you through the causes of the LG dishwasher 1E error and what you can do to fix it safely and quickly.
What does the 1E error code mean?
The 1E error code on your LG dishwasher signals a water inlet error—the appliance didn’t receive enough water during the initial fill cycle. If the system doesn’t detect a minimum water level within a set time frame, it will stop and show the 1E error to prevent damage or ineffective washing.
This problem can be as minor as a closed water valve or as serious as a faulty inlet valve. Luckily, there are a few steps you can take before calling in a technician.
Common causes and how to fix them
Below are the most frequent causes of the LG dishwasher inlet error, and how to troubleshoot each one:
🔹 Cause 1: Water Tap Is Shut
Fix:
Make sure the dishwasher’s water supply valve is fully open. This valve is usually located under the sink. If it’s even partially closed, the dishwasher may not get enough water.
🔹 Cause 2: Inlet Hose Is Kinked or Bent
Fix:
Pull the dishwasher out slightly and inspect the inlet hose behind it. If it’s twisted, crushed, or pinched, straighten it out carefully to restore proper water flow.
🔹 Cause 3: Filter on Inlet Valve Is Blocked
Fix:
- Turn off the dishwasher and shut off the water supply.
- Disconnect the inlet hose from the dishwasher.
- Look inside the water inlet port for a small mesh filter—this traps debris.
- Rinse it gently with water or scrub with a soft brush.
- Reattach the hose securely.
A clogged filter is one of the most common reasons for a dishwasher not filling with water.
🔹 Cause 4: Low Water Pressure
Fix:
Test your water pressure by running other faucets or appliances. If you notice slow flow, you may have low household water pressure—especially common during winter or plumbing work.
- If it’s isolated to the dishwasher, the issue is internal.
- If it affects the whole house, contact your utility provider or a plumber.
🔹 Cause 5: Inlet Valve Failure
Fix:
If you’ve ruled out external issues, the inlet valve itself may be defective. This small electrical component opens to let water into the dishwasher during the fill cycle.
A faulty valve must be tested and replaced by a qualified technician. Attempting to replace it yourself without the right tools or knowledge could cause leaks or further damage.
When to call a technician
While many LG dishwasher troubleshooting steps are simple, some situations call for expert help:
- You’ve cleaned the filter and checked hoses, but the dishwasher still won’t fill.
- Water flows into your washing machine or sink, but not into the dishwasher.
- You suspect an electrical issue or the dishwasher inlet valve needs replacement.
- The 1E error keeps returning even after a reset.
A certified technician can test the dishwasher’s internal electronics, valve resistance, and other key components to ensure a safe and accurate fix.
Conclusion
The LG dishwasher 1E error means the unit isn’t filling with water as expected. Common culprits include a closed water tap, a kinked hose, or a clogged inlet filter—all issues most homeowners can fix quickly.
If those steps don’t work, a professional dishwasher inlet valve replacement may be needed. When in doubt, it’s always safest to call an expert for lasting results and peace of mind.
