Help! LG Dishwasher Won't Fill
Most likely the household supply valve is closed or the water inlet valve (part 5220FR2006H) has failed, so no water reaches the tub. If the board times out waiting for water it aborts the cycle and reports an IE inlet error.
Work the water path from the outside in#
On LG LDT and LDP models the fill system is simple: a single water inlet valve with an integrated mesh screen controls all water entry. The board energizes the valve solenoid on 120V to open it, and a spring closes it when power is cut. Upstream sits the household supply valve and braided hose; downstream a short internal hose carries water into the tub. The board allows a fill window of roughly 8-12 minutes, and if the water-level sensor does not see enough water in that time, it stops and posts IE.
Because the failure can be anywhere along that path, the fastest diagnosis works from the water source toward the machine — find where flow stops rather than guessing at the valve first. That outside-in order matters because the most common cause is not a failed part at all, but a supply valve someone left closed. Confirming water actually reaches the inlet valve before you condemn it saves you from replacing a perfectly good valve. The IE code only tells you the tub never filled in time; it does not tell you why.
Causes ranked by likelihood#
| Likely cause | What you see | Fix |
|---|---|---|
| Closed household supply valve — most likely after plumbing work | Sudden no-fill right after any sink or plumbing service | Open the supply valve fully (counterclockwise to the stop, or lever parallel to the pipe); plumbers often leave it closed. |
| Failed water inlet valve (5220FR2006H) | Valve buzzes but no water enters; IE code | Test the solenoid and replace the valve; a clogged screen or dead coil both stop the fill. |
| Kinked or blocked supply hose | Slow or no fill with the supply valve open | Straighten the hose and clear the inlet screen of debris. |
| Low water pressure | Partial fill, worse at peak-use hours | Confirm adequate household pressure at the supply line. |
| Water-level sensor fault | Fill happens but the board still reports IE | Test the level sensor; replace if it misreports the fill. |
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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Check it yourself, in order#
- Confirm the household supply valve under the sink is fully open — this is the single most common cause of a sudden no-fill after plumbing work.
- Watch a cycle: an IE code after several minutes means the board never saw enough water arrive.
- Shut the supply, disconnect the hose at the inlet valve (a 10mm wrench at the fitting), and confirm strong flow from the hose into a bucket.
- Inspect the inlet valve's mesh screen for debris and clear it.
- Listen at the valve during fill — a buzz with no water is a solenoid energizing against a stuck or clogged valve.
- If flow and valve are good but IE persists, test the water-level sensor.
Prevent the repeat#
After any plumbing or sink work, make a habit of confirming the [dishwasher](/blog/repair-or-replace-dishwasher) supply valve was reopened, since that oversight causes most sudden no-fill calls. Periodically clearing the inlet screen also keeps sediment from throttling the valve in homes with older pipes.
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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Repair or replace?#
A no-fill is almost always a supply valve, an inlet valve, or a hose — inexpensive relative to a new dishwasher. A repeat-failing control or level sensor on an older LG is where a repair-or-replace decision belongs. A technician can trace the water path and confirm the part in one visit. Book a diagnosis for an upfront quote.
Senior Appliance Repair Technician · 15 years experience
EPA-certified technician with 15 years of experience specializing in refrigerator and cooling system repairs.
