Ice maker heater issue
This step-by-step repair guide walks you through fixing ice maker heater issue on your LG LRFXS2503S (French Door). With the right tools and parts, most homeowners can complete this repair in 1–2 hours and avoid a costly service call.
Part of our Top 20 Refrigerator Models & Common Repair Issues Guide. Browse all refrigerator repair guides for related models and issues.
“`htmlCommon Symptoms & Causes
These symptoms on your LG LRFXS2503S typically point to a failing ice maker heater assembly.
- Ice cubes are clumped together in a large frozen mass inside the ice bin
- The ice maker stops producing ice entirely after running normally
- Frost or heavy ice buildup is visible around the ice maker unit
- The ice dispenser chute is blocked by ice that won’t release
This issue is most commonly caused by a burned-out or failed ice maker heater element, which prevents the harvest cycle from releasing ice properly and leads to repeated freeze-over.
“`Safety First
- Unplug the refrigerator from the power outlet before starting any repair — never work on a live appliance.
- Shut off the water supply valve before disconnecting any water lines or hoses.
- Wear work gloves when handling metal brackets, sheet metal edges, or sharp components.
- Take photos with your phone before disconnecting any wiring harnesses or connectors.
- Work in a well-lit area with enough floor space to lay removed panels flat.
Tools & Parts Needed
Essential Tools
- Phillips #2 screwdriver
- ¼” nut driver
- Needle-nose pliers
- Multimeter
- Flashlight or work light
Replacement Parts
Step-by-Step Repair Instructions
Step 1
Unplug the refrigerator before beginning — working on live appliances near water and ice is a shock hazard. Remove the ice maker by backing out 2–3 Phillips screws and unplugging the wiring harness, then locate the heater wire routed along the underside of the ice mold; this heater warms the mold briefly during harvest to release cubes, and when it fails, ice bonds to the mold and the maker stops cycling.
Step 2
Set your multimeter to Rx1 and probe the heater wire terminals — a healthy heater reads roughly 70–120 ohms, confirming the resistance coil is intact. An open circuit (OL or no reading) means the heater element has burned through and is the confirmed cause of your harvest failure; this test saves you from replacing parts blindly.
Step 3
On the LG LRFXS2503S, the heater is molded directly into the ice maker assembly and cannot be replaced as a standalone part. You will need to order the complete ice maker assembly, part number AEQ73130008 — confirm the part number against your serial tag before ordering, as LG used similar-looking assemblies across models.
Step 4
Before spending money on the full assembly, test the mold thermostat — the small bi-metal clip attached to the mold — for continuity at room temperature using your multimeter. It should read closed (continuous) at room temp; an open reading means the thermostat has tripped or failed and, at around $15, it is worth replacing this first since a faulty thermostat can produce the same harvest failure symptoms as a dead heater.
Step 5
Inspect the evaporator coil (accessible from the rear freezer panel) for heavy frost or ice buildup, which signals a failed defrost system unrelated to the ice maker itself. If the evaporator is heavily frosted, the freezer temperature rises enough to prevent proper ice release regardless of whether the heater and thermostat are working — fix the defrost system first or the new ice maker assembly will exhibit the same problem.
Step 6
Reconnect the wiring harness and secure the new ice maker assembly with the original screws, making sure the harness clip seats fully — a loose connection here causes intermittent failures that are hard to diagnose later. Restore power and allow 24 hours for the first full harvest cycle; the initial batch of cubes may be slightly smaller than normal as the new mold surface conditions and thermal cycling stabilizes.
Where to Buy Replacement Parts
Find genuine OEM and aftermarket replacement parts for your LG LRFXS2503S (French Door) on Amazon:
- LG LRFXS2503S ice maker assembly AEQ73130008 replacement
- LG refrigerator ice mold heater ADJ73453816
- LG ice maker thermostat 6615JB2002C
When to Call a Professional
If the issue persists after completing all steps above, the problem may involve the sealed refrigerant system, a failed main control board, or wiring that requires specialized diagnostic equipment. Contact a licensed appliance technician — attempting sealed-system repairs without EPA 608 certification is illegal and unsafe.
“`htmlHow Much Does This Repair Cost?
Replacing the ice maker heater on your LG LRFXS2503S typically costs $20–$65 in parts when doing it yourself. A professional repair service call usually runs $150–$300, including labor and parts. By tackling this repair yourself, you can save up to $250 or more while getting your ice maker back in working order.
“`Frequently Asked Questions
How do I know if the ice maker heater is faulty on my LG LRFXS2503S?
Common signs include ice clumping together, the ice maker stopping production, or a thick frost buildup around the ice maker unit. Running a diagnostic cycle through the LG service menu can help confirm a heater failure.
Is it safe to repair the ice maker heater myself?
Yes, but always unplug the refrigerator before accessing any internal components. If you are uncomfortable working with electrical parts, hiring a certified appliance technician is recommended.
How long does an ice maker heater replacement take on the LG LRFXS2503S?
Most repairs take between one and two hours, depending on your experience level. Allow an additional 24 hours after reassembly for the ice maker to resume normal production.