Fix LG Dishwasher Not Draining – 8 Easy DIY Tips

Experiencing issues with your LG dishwasher not draining can be a real trouble, especially when you’re counting on it for your daily kitchen chores.

LG dishwashers are known for their reliability and performance. Still, like all appliances, they may run into problems, such as not draining properly.

But fret not; I’ll walk you through the common reasons why your LG dishwasher won’t drain water properly and provide easy fixes to get it back to optimal performance.

Pro Tip: Fix your LG dishwasher not draining by clearing clogged filters, hoses, and air gaps, using the correct detergent, and ensuring proper dish loading for optimal performance.

LG dishwasher Not Draining

8 Reasons Why Your LG Dishwasher Won’t Drain

Understanding the root cause of the drainage issue is crucial in tackling the problem effectively. Here are some common reasons:

  1. Clogged Drain Filter
  2. Blocked Garbage Disposal
  3. Clogged Drain Hose
  4. Faulty Drain Pump
  5. Kinked Drain Hose
  6. Full or Blocked Air Gap
  7. Improper Dish Loading
  8. Incorrect Detergent
  9. Lack of Rinse Aid

How to Fix LG Dishwasher Not Draining?

When your dishwasher is not draining water and showing errors, it’s essential to approach the issue methodically. Let’s break down each problem and explore how to fix the LG dishwasher draining problem.

1. Clogged Drain Filter

A common issue with LG dishwashers involves the drain filter becoming clogged. This filter traps food particles and debris, preventing them from entering the drainage system.

However, these particles can accumulate over time, leading to a blockage that impedes the dishwasher’s ability to drain water effectively.

Easy Fix:

To address a clogged drain filter in your LG dishwasher, first, ensure the appliance is unplugged for safety.

Remove the lower access panel to access the filter, typically at the dishwasher’s bottom.

Carefully remove and thoroughly clean the filter, eliminating any accumulated debris or blockages.

After cleaning, reinsert the filter and ensure it’s properly seated. This simple maintenance step can significantly improve drainage efficiency.

2. Blocked Garbage Disposal

A blocked garbage disposal may compromise your LG dishwasher’s drainage. Many LG models are designed to drain into the household garbage disposal system.

If this disposal is clogged, it can hinder the dishwasher’s ability to expel water, leading to drainage issues.

Easy Fix:

To fix a blocked garbage disposal affecting your LG dishwasher, start by running cold water down the sink drain.

Activate the garbage disposal for a few minutes to clear any blockages.

It’s also important to check that the plug has been removed from the disposal unit, especially in new installations, as this is a common oversight.

Regular garbage disposal maintenance can prevent drainage problems with your dishwasher.

3. Clogged Drain Hose

The drain hose of your LG dishwasher plays a pivotal role in the draining process.

A clog near where it connects to the sink’s drain is a common culprit. Kinks can also develop if the hose isn’t supported properly.

LG dishwasher won't drain

Easy Fix:

First, inspect the hose for kinks or bends, particularly where it passes through the cabinet to connect the dishwasher. Straighten any kinks you find.

Then, detach the hose from the sink or garbage disposal and clear out any blockages. Reattach the hose securely and run a cycle to test.

4. Faulty Drain Pump

A malfunctioning drain pump is another reason why your LG dishwasher won’t drain properly. The drain pump is responsible for expelling water from the dishwasher.

┬áIf it starts to fail, it can’t perform this function effectively, leading to water accumulation.

A faulty pump can also result in the LG dishwasher not turning on issue.

Easy Fix:

To troubleshoot a faulty drain pump in your LG dishwasher, ensure that the appliance receives the correct voltage. Check for a 120-volt power supply to the pump during a wash cycle.

If the pump has power but is not functioning, inspect it for any obstructions that might hinder its operation. I

If no blockages are found, and the pump still fails to operate, it may need to be replaced.

Handling electrical components requires caution, so consider consulting a professional to repair or replace the LG dishwasher’s drain pump.

5. Full or Blocked Air Gap

A full or blocked air gap in your kitchen sink can lead to significant drainage issues in your LG dishwasher.

The air gap is an essential component preventing dirty water from siphoning into the dishwasher.

If this component becomes clogged with debris, it disrupts the normal water flow out of the dishwasher.

Easy Fix:

Start fixing your LG dishwasher not draining by cleaning the air gap, usually located near the kitchen faucet.

Ensure it’s clear of any debris, food particles, or buildup. Keeping this area clean not only enhances drainage efficiency but also contributes to the overall hygiene of your dishwasher system.

Fixing LG dishwasher draining problem

6. Improper Dish Loading

Improperly loaded dishes in your LG dishwasher can obstruct the water flow, leading to drainage issues.

When dishes are stacked haphazardly or too closely, they can block the spray arm’s movement or create pockets where water pools, preventing effective drainage.

Easy Fix:

Load your dishwasher correctly to avoid drainage problems. Ensure that dishes are placed in a manner that allows the spray arm to move freely and water to reach all surfaces.

Avoid overloading and strategically place larger items so they don’t obstruct water flow.

This simple adjustment in dish loading can greatly improve your dishwasher’s performance and drainage.

7. Incorrect Detergent

Using incorrect detergent in your LG dishwasher can lead to drainage issues. Regular dish soap or detergents not formulated for dishwashers can create excessive suds.

These suds can interfere with the dishwasher’s normal operation and drainage system, leading to inefficient draining and potential water overflow.

Easy Fix:

Always use detergent specifically designed for dishwashers. These detergents are formulated to avoid excessive sudsing and ensure efficient cleaning and draining.

Check your LG dishwasher’s manual for recommended detergent types and follow the suggested amount per load to prevent any drainage problems.

8. Lack of Rinse Aid

Lack of rinse aid in your LG dishwasher can result in water not draining properly off the dishes.

Rinse aids are designed to lower the surface tension of water, promoting better draining and reducing spots and film.

Easy Fix:

Incorporate a rinse aid into your dishwasher’s routine. This helps water drain more effectively from your dishes, reducing the chances of excess water being left behind in the dishwasher.

Following the manufacturer’s instructions for the type and amount of rinse aid to use can optimize the dishwasher’s performance and enhance the drying process.

Check out the following articles if you have other dishwasher brands:


Addressing the LG dishwasher not draining issue doesn’t have to be a daunting task.

You can resolve most issues yourself with the right approach and understanding of common problems like clogged filters, blocked air gaps, or incorrect detergents.

Proper maintenance and correct usage ensure your LG dishwasher runs smoothly.

So, next time your dishwasher faces a hiccup, revisit these tips and get your trusty appliance back to its best performance in no time.

Remember these pointers, and your dishwasher will thank you with impeccable service!

Steven Settles Author

Steven Settles is an ISCET-certified master in appliance repair. He has aced the National Appliance Service Technician Certification Exam, showcasing his exceptional diagnostic and repair skills. With an in-depth understanding of the latest repair technologies and a keen eye on evolving industry standards, Steven is a go-to expert for any appliance issue.

Leave a Comment