How to Fix Test/Fill Button Reset on LG 5989JA1005G Ice Maker

Test/Fill Button Reset

In this repair guide, I’ll walk you through fixing the test/fill button reset on your LG 5989JA1005G ice maker. This issue is quite common with this model, but with the right tools and step-by-step instructions, you can tackle this repair yourself and avoid the cost of a service call.

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

Ice maker stops cycling; manual test cycle to reset electronics.

Before diving into any repair, it’s crucial to understand what’s causing the issue. This problem often stems from normal wear and tear, a component failure, or environmental factors like mineral buildup or temperature fluctuations. Pinpointing the root cause will help you decide if this repair will fix the problem or if you’ll need to troubleshoot further.

Safety First

Before starting 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 avoid injury from cold surfaces.
• Have a helper available — Some repairs require two people, especially when handling heavy components.

Tools and Parts Needed

Before starting 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

This repair does not require replacement parts. The issue can often be resolved through adjustment, cleaning, or reset procedures.

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, making ice removal easier and preventing 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 one of the side walls 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 often involves removing 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 snapping a few photos with your phone to assist with reassembly.

Step 4: Diagnose the Issue

With the ice maker removed, give it a thorough inspection for any visible signs of damage, wear, or malfunction. Look for cracked plastic components, damaged wiring, or signs of water damage. If you have a multimeter, test electrical connections according to the manufacturer’s specifications. This diagnostic step is crucial to ensure you’re addressing the right problem.

Step 5: Perform the Repair

For this repair, you’ll be performing adjustments, cleaning, or reset procedures rather than replacing parts. Follow the specific procedures for your model, which may involve adjusting mechanical components, cleaning mineral buildup, or resetting electronic controls.

Step 6: Reinstall the Ice Maker

Once the repair is done, carefully reinstall the ice maker assembly. Reconnect all wiring harnesses and water lines, ensuring everything is secure. Mount the unit back in its original position, tightening all mounting screws. Make sure the ice maker sits level and that there are no obstructions that could prevent it from operating properly.

Step 7: Restore Power and Water

Turn the water supply back on and check for any leaks around connections. Plug the appliance back into the electrical outlet. For refrigerator ice makers, close the freezer door and let the unit 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. Keep an eye on 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 — The 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 stop 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 ensure 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 circumstances where it’s best to call in a professional:

• 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 — Maintain 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 help 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	$45–$90 (replacement ice maker assembly)
Professional repair	$150–$280 (parts and labor)

For a DIY repair, expect to spend $45–$90 for a replacement LG ice maker assembly or $8–$20 if only the wire harness connector needs replacing. A professional service call for this same issue typically runs $150–$280, including parts and labor, so the DIY savings are significant.

Recommended Products

These are the parts and tools I recommend for this repair, based on compatibility and customer reviews:

• 5989JA1005G Refrigerator Ice Maker Assembly, OEM Upgraded Replacement, Compatible with LG & Kenmore Refrigerator Models, for Household and Commercial Use
• LG 5989JA1005G Refrigerator Ice Maker Assembly Genuine Original Equipment Manufacturer (OEM) Part
• SUPPLYZ Direct Replacement for LG AEQ73110221 Refrigerator Ice Maker Assembly Kit
• OEM AEQ73110221 Refrigerator Ice Maker Assembly (14-Cube) for LG & Kenmore Refrigerators | Verify Connector Pins Before Ordering (Replaces AEQ73110218)

The Ice Maker Assembly That Actually Stops the Test/Fill Button Reset Loop

If you’ve reset the control module and cleaned the button contacts and the Test/Fill button still won’t hold, the ice maker assembly itself is your culprit—and honestly, this is where most of these calls end up. Replacing the whole unit is faster and more reliable than chasing intermittent electrical gremlins on a 15-year-old component.

What works

• Direct bolt-on fit—no adapter nonsense or pinout guessing; connectors line up exactly and the assembly seats flush in the freezer compartment.
• Button stays pressed and holds state after replacement; no more false resets or phantom fill cycles that drain your water line.
• OEM-upgraded version means the internal switch mechanism is improved from the original design, so you’re not just swapping in the same weak part.

What doesn’t

• More expensive than a button replacement or control board reset, so make sure you’ve actually ruled out those fixes first—don’t order this until you’ve tested continuity on the old button with a multimeter.
• Requires draining residual water from the old assembly and disconnecting the fill line; if you’re not comfortable with that step, this becomes a service call rather than a DIY job.

I’ve seen people order a new button assembly three times before realizing the mechanical failure was deeper—the upgraded OEM replacement eliminates that frustration and actually solves the root cause. 5989JA1005G Refrigerator Ice Maker Assembly, OEM Upgraded Replacement