LG Refrigerator Water Inlet Valve Replacement — Ice and Water Problems
The water inlet valve on an LG refrigerator is a dual-solenoid valve at the back bottom of the unit that controls water flow to both the ice maker and the water dispenser. Each solenoid operates independently — the ice maker solenoid opens when the ice maker calls for water, and the dispenser solenoid opens when you press the dispenser paddle. When a solenoid fails, you lose one function while the other continues working.
Dual Solenoid Design
LG refrigerator inlet valves have two separate solenoid coils, each controlling water flow to a different destination:
- Primary solenoid → ice maker fill tube
- Secondary solenoid → water dispenser line
This means the ice maker can stop making ice while the water dispenser works fine, or vice versa. Each solenoid can fail independently.
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Multimeter ($85), vacuum pump ($250), diagnostic software, and specialized hand tools. Our technician arrives with $15K+ in professional tools — your diagnostic is free.
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Symptoms
| Symptom | Likely Cause |
|---|---|
| No ice production but dispenser works | Ice maker solenoid failed |
| No water from dispenser but ice maker works | Dispenser solenoid failed |
| Neither ice nor water | Both solenoids failed, water supply off, or filter severely clogged |
| Water continues dripping into ice maker | Solenoid stuck open — ice cubes are oversized or fused together |
| Weak/slow water from dispenser | Solenoid partially clogged with mineral deposits |
| Small or hollow ice cubes | Reduced water flow from mineral buildup |
Before Replacing the Valve
Check simpler causes first:
- Water supply valve behind the refrigerator — is it fully open?
- Water filter — a clogged filter restricts flow to both ice maker and dispenser. Replace if over 6 months old.
- Kinked supply line — the copper or braided supply line can kink where it connects to the valve. Straighten it.
- Frozen fill tube — the small tube from the valve to the ice maker mold can freeze. Thaw with a hair dryer.
Safety First — Know the Risks
Appliances involve high voltage (120-240V), pressurized water, gas lines, and chemical refrigerants. Over 400 DIY repair injuries are reported yearly. Our techs are licensed and insured — let them handle the risk.
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Part Numbers and Pricing
| Part | LG Number | Price |
|---|---|---|
| Dual inlet valve | 5220JA2009D | $25-$75 |
| Inlet valve (older models) | 5220JA2008B | $20-$65 |
| Aftermarket valve | Various | $12-$40 |
| Professional replacement | — | $100-$170 |
Tools Required
- Phillips #2 — for rear access panel
- Adjustable wrench — for the water supply line fitting (3/4 inch or 1/4 inch compression)
- Multimeter — for solenoid coil testing
- Towels and bucket — water spills when disconnecting
The Real Cost of DIY
Average DIY attempt: $150-400 in tools you may use once, plus the risk of further damage. Our diagnostic visit costs $0 — we find the problem and give you an honest quote.
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Testing the Solenoids
Disconnect power. Pull the refrigerator away from the wall. Remove the rear bottom panel. Locate the inlet valve — it is where the water supply line connects to the refrigerator.
Disconnect the wire connectors from both solenoid coils. Test each coil independently — set multimeter to resistance. Expected reading: 200-500 ohms per coil. Infinite = open coil (failed). Very low = shorted coil.
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Replacement Steps
Shut off the water supply. Disconnect power. Remove the rear bottom panel. Disconnect the water supply line from the valve inlet fitting. Disconnect the two internal water lines from the valve outlets (one to ice maker, one to dispenser). Disconnect the wire harnesses from both solenoids. Remove the valve mounting screws (typically 2 Phillips).
Install the new valve in reverse order. Tighten the supply line fitting by hand plus 1/4 turn — do not overtighten (plastic threads crack). Turn on the water supply and check for leaks at all three fittings before pushing the refrigerator back.
Allow 24 hours for the ice maker to produce a full batch.
Don't Void Your Warranty
Opening your appliance yourself may void the manufacturer warranty. Our repair comes with a 90-day guarantee, and we document everything for warranty compliance.
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Hard Water and Valve Life
In hard water areas (common in Sacramento and some Bay Area zones), mineral deposits build up inside the valve body and restrict flow. Annual cleaning of the valve inlet screen (remove with needle-nose pliers, soak in vinegar) extends valve life. If deposits have reached the internal solenoid plunger, the valve must be replaced.
Frequently Asked Questions
My LG refrigerator ice maker stopped but the water dispenser works. Is the valve bad?
The ice maker solenoid may have failed while the dispenser solenoid is fine. Test the ice maker solenoid coil resistance. Also check for a frozen fill tube before condemning the valve.
Water keeps dripping into the ice maker tray. Is the valve stuck open?
Yes — the ice maker solenoid is not fully closing. This causes oversized, fused, or misshapen ice cubes. Replace the valve to prevent overflow flooding.
How long does an LG refrigerator inlet valve last?
Typically 8-12 years. Hard water shortens lifespan to 5-8 years. Annual screen cleaning helps.
LG refrigerator ice or water problems? Our technicians test the valve, filter, and supply line to find the cause. Book a technician →
