LG 5989JA1005G Water Filter Replacement

Water Filter Replacement

In this repair guide, I’m going to walk you through fixing the water filter replacement on your LG 5989JA1005G ice maker. This is one of the most common issues I encounter with this model, and with the right tools and step-by-step instructions, you can complete this repair yourself and save on service costs.

🔨 Pro Tip from Dave

One common mistake I see with the LG 5989JA1005G is DIYers forcing the replacement filter — specifically the LG LT500P or compatible ADQ72910901 — before properly aligning the locking tab. If you hear a click but water flow is still weak, check that the O-ring on the new filter hasn’t rolled or pinched during installation. A misaligned O-ring can cause slow fill and even bypass leaking, which might look like a bigger issue than it actually is.

This repair guide is part of our comprehensive Top 20 Ice Maker Models & Common Repair Issues Guide. Check out the full guide for information on other ice maker models and common repair issues.

Understanding the Problem

Reduced ice production due to clogged filter restricting water flow

Before starting any repair, it’s crucial to understand what’s causing the issue. Typically, this problem arises from normal wear and tear, component failure, or environmental factors such as mineral buildup or temperature fluctuations. Identifying the root cause will help you determine if this repair will resolve your problem or if further troubleshooting is necessary.

Safety First

Before diving into any ice maker repair, always follow these safety precautions:

Unplug the appliance – Always disconnect power before working on any electrical components.
Turn off water supply – Shut off the water line to prevent leaks and water damage.
Wear protective gear – Use gloves and safety glasses when handling sharp components or working with tools.
Work in a well-lit area – Ensure you have adequate lighting to see all components clearly.
Allow components to warm up – If working on freezer components, let them reach room temperature to prevent injury from cold surfaces.
Have a helper available – Some repairs require two people, especially when handling heavy components.

Tools and Parts Needed

Before you start this repair, gather the following tools and parts:

Essential Tools

Phillips and flathead screwdrivers – For removing screws and accessing components.
Nut driver set – For removing hex nuts and bolts.
Pliers – Both regular and needle-nose pliers for gripping and manipulating small parts.
Multimeter – For testing electrical components and continuity.
Putty knife or plastic scraper – For removing ice buildup without damaging components.
Flashlight or work light – For illuminating dark freezer compartments.
Container for water – To catch any water that drains during the repair.

Replacement Parts

Part Number: LT700P

Estimated Cost: $45-65

You can find this replacement part at appliance parts stores, online retailers, or through the manufacturer. Always verify the part number matches your specific model before purchasing.

Step-by-Step Repair Instructions

Step 1: Preparation

Start by unplugging your refrigerator or ice maker from the electrical outlet. If you’re working on a built-in refrigerator ice maker, locate the water shut-off valve and turn it off. For standalone units, empty the water reservoir. Allow the unit to sit for 15-30 minutes to reach room temperature, which will make ice removal easier and prevent injury from cold surfaces.

Step 2: Access the Ice Maker

For refrigerator ice makers, open the freezer door and locate the ice maker assembly. It’s typically mounted on the left or right side wall of the freezer compartment. Remove any ice that has built up around the unit. For standalone ice makers, remove the ice basket and any ice obstructing access to internal components.

Step 3: Remove the Ice Maker Assembly

Carefully disconnect the ice maker from its mounting. This usually involves removing mounting screws or clips that secure the unit to the freezer wall. Gently pull the ice maker forward, being cautious not to damage the water line connection. If there’s a wiring harness, take note of how it’s connected before disconnecting it. I recommend taking photos with your phone to help with reassembly later.

Step 4: Diagnose the Issue

With the ice maker removed, inspect it closely for visible signs of damage, wear, or malfunction. Look for cracked plastic components, damaged wiring, or indications of water damage. If you have a multimeter, test electrical connections according to the manufacturer’s specifications. This diagnostic step will confirm that you’re addressing the correct problem.

Step 5: Perform the Repair

If you’re replacing a component, carefully remove the old part following the manufacturer’s instructions. Install the new LT700P replacement part, ensuring all connections are secure and properly aligned. Double-check that all screws are tightened appropriately — not too loose, but not so tight that you strip the threads.

Step 6: Reinstall the Ice Maker

Once the repair is complete, carefully reinstall the ice maker assembly. Reconnect all wiring harnesses and water lines, ensuring connections are secure. Mount the unit back in its original position, tightening all mounting screws. Verify that the ice maker sits level and that there are no obstructions preventing proper operation.

Step 7: Restore Power and Water

Turn the water supply back on and check for any leaks around the connections. Plug the appliance back into the electrical outlet. For refrigerator ice makers, close the freezer door and allow the unit to cool down. The ice maker should begin its normal cycle once the freezer reaches the proper temperature (typically 0-5°F).

Step 8: Test the Repair

Allow 24 hours for the ice maker to complete a full cycle and produce ice. Monitor the unit during this time to ensure it’s operating correctly. Check that ice is being produced at the expected rate and that there are no unusual noises or error indicators. If the problem persists, you may need to troubleshoot further or consult a professional.

Troubleshooting Tips

If your ice maker still isn’t working after completing this repair, try these troubleshooting steps:

Check water supply – Ensure the water line is not kinked or blocked, and that water pressure is adequate.
Verify temperature – Freezer temperature should be between 0-5°F for optimal ice production.
Inspect water filter – A clogged water filter can restrict flow and prevent ice production.
Check for ice buildup – Excessive ice accumulation can prevent the ice maker from operating.
Review error codes – If your model has a display, check for any error codes that might indicate additional issues.
Test electrical connections – Use a multimeter to verify all electrical connections are secure and functioning.

When to Call a Professional

While many ice maker repairs can be tackled by DIY enthusiasts, there are situations where professional help is advisable:

If you’re uncomfortable working with electrical components.
When the repair requires specialized tools or knowledge.
If the problem persists after following all troubleshooting steps.
When dealing with complex electronic control boards.
If you discover additional problems during the repair.
When the cost of parts approaches the cost of a new unit (for standalone ice makers).

Prevention and Maintenance

To prevent this issue from recurring, follow these maintenance tips:

Regular cleaning – Clean your ice maker according to manufacturer recommendations, typically every 3-6 months.
Replace water filters – Change water filters every 6 months or as recommended by the manufacturer.
Monitor temperature – Keep your freezer at the optimal temperature for ice production.
Check for leaks – Regularly inspect water connections for signs of leaks or wear.
Descale regularly – In areas with hard water, descale your ice maker more frequently to prevent mineral buildup.
Use quality water – Using filtered or purified water can extend the life of your ice maker.

Related Repair Guides

If this repair didn’t solve your problem, or if you’re experiencing other issues with your LG 5989JA1005G ice maker, check out our Top 20 Ice Maker Models & Common Repair Issues Guide for information on other common problems and their solutions.

How Much Does This Repair Cost?

Repair route	Typical cost
Do it yourself	$15–$35 (parts)
Professional repair	$80–$150 (parts and labor)

Costs vary by model, supplier, and local labor rates.

A replacement water filter compatible with the LG 5989JA1005G typically runs $15–$35 for DIY, depending on whether you go OEM or a certified aftermarket option. A professional service call for the same repair usually costs $80–$150 once you factor in the labor fee, making this one of the best repairs to handle yourself.

The OEM-Compatible Filter That Solves 90% of LG 5989JA1005G Water Flow Problems

Most of my service calls on this model come down to a filter that’s either clogged, expired, or simply the wrong replacement sitting in the housing. Getting the right compatible filter — one that actually seats flush and maintains proper water pressure — eliminates the guesswork and stops you from chasing electrical diagnostics that don’t exist.

What works

Cross-compatible with the LT500P housing on the 5989JA1005G — no adapter fumbling or forcing parts together.
The 3-pack means you have a backup on hand; filter life on this model is real, and you’ll actually use the second one within 18 months if you run ice daily.
Water pressure returns to normal immediately after installation — if it doesn’t, you know the problem is mechanical (housing crack) or electrical, not filter choice.

What doesn’t

Won’t fix a corroded or damaged filter housing — if water leaks from the cartridge area itself, the housing needs replacement, not just the filter.
Can’t diagnose whether the filter housing is actually seated correctly; you still need to pull it out and reinstall to confirm a proper seal.

I’ve had homeowners order the wrong filter model first and end up with a part that physically fits but leaks around the seal — wasting time and a return shipment. Grab the Waterdrop 5231JA2002A Refrigerator Water Filter and confirm the housing clicks home with zero gaps before declaring the repair done.

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How to Fix Water Filter Replacement on LG 5989JA1005G Ice Maker

Water Filter Replacement

Understanding the Problem

Safety First