LG Refrigerator Water Inlet Valve Parts — Models & Compatibility

If your LG refrigerator stopped dispensing water or the ice maker quit working, the water inlet valve is usually the culprit. This hub covers the MJX41178908 replacement valve — compatible with dozens of LG French door and side-by-side models from the LFX and LMX series. This valve controls water flow to both the dispenser and ice maker, and when it fails, you'll know it fast.

Is This the Right Part for Your Model?

Before ordering, grab your model number from inside the refrigerator — it's typically on the left wall near the top shelf, or on the right side wall behind the crisper drawers. Match it against the compatibility list below. This valve fits LFX25950, LFX25960, LFX25961, LFX25971, LFX25975, LFX25980, LFX28977, and LMX21981 series models, among others. If your model starts with LFX or LMX and was made between 2008-2015, there's a good chance this is your valve.

About This Replacement Part

The MJX41178908 is a direct OEM-quality replacement that supersedes several older part numbers including AP4451762, PS3536019, 1398828, and 5221JA2011J. It mounts to the back lower panel of your refrigerator and connects to your home water line via a quarter-inch compression fitting. The valve uses dual solenoids — one for the dispenser, one for the ice maker — so if either function stops working, this valve is likely the problem. Most LG French door models use this exact valve configuration, which makes it one of the most commonly replaced water components in these refrigerators.

Common Signs You Need This Valve

Water inlet valves don't usually fail gradually — they quit. You'll notice no water coming from the dispenser even though you hear the solenoid clicking. Or your ice maker stops producing ice entirely. Sometimes the valve sticks open and causes slow leaking behind the refrigerator or pooling water inside the fresh food compartment. If you've already verified your water supply line has pressure and the filter isn't clogged, the valve is the next logical replacement.

What's Included

You're getting the complete valve assembly with mounting bracket and wire harness connector. The inlet and outlet ports are pre-installed, so you're just swapping the old unit for this new one. No additional brackets or hardware needed — everything mounts using the existing screws from your original valve.

Installation Overview

This is a back-panel job. You'll unplug the fridge, shut off the water supply, and pull the unit away from the wall. Remove the lower back panel (usually 4-6 screws), disconnect the water line and wire harness from the old valve, unbolt it, and reverse the process with the new valve. The whole job takes about 30 minutes if you've got basic tools and a bucket for residual water. Make sure you purge air from the water line before reconnecting — run a few gallons through the dispenser to clear any trapped air that could interfere with ice production.

Compatible LG Refrigerator Models

This valve works across multiple LG series. Check your exact model number before ordering:

• LFX25950SB, LFX25950SW, LFX25950TT — French door models
• LFX25960SB, LFX25960SW — French door with bottom freezer
• LFX25961AL, LFX25961SB, LFX25961SW — French door ultra-capacity
• LFX25971SB, LFX25971ST, LFX25971SW — French door stainless and black stainless
• LFX25975SB, LFX25975ST, LFX25975SW — French door with door-in-door
• LFX25980ST — French door stainless
• LFX28977SB, LFX28977ST, LFX28977SW — 28 cu ft French door models
• LMX21981ST — Side-by-side stainless

If your model isn't listed here but starts with LFX or LMX, cross-reference the original part numbers on your existing valve. If you see AP4451762, PS3536019, or 5221JA2011J printed on it, this valve will fit.

Why This Valve Fails

Water inlet valves have a limited lifespan because they're under constant pressure and cycle thousands of times. The solenoids eventually wear out or the valve seat develops calcium buildup that prevents proper sealing. If you have hard water, you're accelerating this wear — mineral deposits restrict water flow and force the solenoids to work harder. Replacing your water filter on schedule helps, but eventually every valve reaches end-of-life. Most LG valves last 5-8 years depending on usage and water quality.

Price and Availability

The MJX41178908 valve is priced at $58.99 — reasonable for an OEM-quality part that restores full water and ice functionality. It's in stock and ready to ship. Given that a service call for this repair typically runs $200-300 with labor, doing it yourself saves you about $150-250. The part usually pays for itself in one repair.