LG Dishwasher Inlet Valve Replacement & Cost
An LG dishwasher that throws an IE error, refuses to fill, or keeps filling after the cycle ends almost always has a failed water inlet valve — a solenoid part most homeowners can swap in under an hour.
The inlet valve is the electrically operated gate between your home water supply and the dishwasher tub. When the control board wants water, it sends roughly 120 volts to the solenoid coil; the coil lifts a spring-loaded plunger and water flows through a mesh inlet screen into the tub. Lose that action and the machine either starves for water or floods.
Why LG Inlet Valves Fail#
Two things kill these valves. The first is the solenoid coil itself burning open or shorting after years of energizing. The second — far more common in hard-water areas — is the small inlet screen at the hose connection silting up with calcium. As the screen clogs, fill rate drops until the board times out waiting for the tub to reach level and posts the IE (inlet error) code.
Do You Have the Right Tools?
Water pressure gauge ($60), spray arm tester, float switch multimeter ($85), and drain inspection camera. Our technician arrives with $3,000+ in professional tools — your diagnostic is free.
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Read the Symptom Before You Order#
| What you see | What it points to | Fix path |
|---|---|---|
| IE error, no water at all | Dead coil or fully blocked screen | Test coil, then replace valve |
| Valve buzzes, no flow | Plunger stuck with mineral scale | Replace valve |
| Very slow fill | Partially clogged inlet screen | Clean the screen first |
| Fills after cycle ends or with power off | Valve stuck open — flood risk | Shut off water, replace now |
| IE but supply valve closed or hose kinked | Not the valve | Fix supply, retest |
A tub that keeps filling with the dishwasher off is the one symptom you should not sit on — close the under-sink supply valve immediately and replace the part before it overflows.
Tools You Will Need#
A #2 Phillips for the lower access panel, an adjustable or 3/4-inch wrench for the supply-line fitting, a multimeter to read the coil, needle-nose pliers to pull the inlet screen, and towels plus a shallow bucket, because the line will drip when you break the fitting.
Safety First — Know the Risks
Live 120V wiring in a wet environment is one of the most dangerous DIY scenarios. Water + electricity = serious shock risk. Our techs are licensed and insured — let them handle the risk.
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Test the Coil First#
Kill power at the breaker and close the water supply. Drop the lower kick panel and find the valve where the fill hose enters the machine. Unplug the coil harness and put your meter across the coil terminals on the resistance setting. A healthy coil reads roughly 500 to 1,500 ohms. Infinite resistance means the coil is open, or burned out; a reading under about 50 ohms means it is shorted. Either result condemns the valve.
While you are in there, pull the inlet screen with needle-nose pliers and look for scale. A lightly fouled screen can be soaked in white vinegar for about 30 minutes and reused; a screen crusted solid means the valve is done, since LG does not sell the screen separately.
Swapping the Valve#
With power and water off, disconnect the supply hose — towel ready — then release the internal hose clamp and the coil harness. Back out the one or two mounting screws holding the valve bracket and lift the old valve out. Fit the replacement in reverse. Snug the supply fitting by hand plus about a quarter turn with the wrench; over-tightening cracks the plastic inlet port. Reconnect everything, reopen the water, and check the fitting for drips before you restore power. Finish with a rinse-only cycle to confirm a clean fill.
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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Which Part Number#
Current-production valves carry LG number 5220FR2006H; the legacy equivalent is 5220FR2008F. Aftermarket units exist and drop in the same way, though OEM coils tend to hold their resistance spec longer.
Keep It From Coming Back#
On well water or hard municipal supply, that inlet screen re-clogs every two to three years. Pulling and vinegar-soaking the screen once a year is a 15-minute job that spares you the whole valve replacement down the line.
Appliance Repair Technician · 8 years experience
Experienced technician with 8 years specializing in dishwasher repairs and European appliance brands including Bosch and Thermador.
