LG Washer Error Code E1 — Water Supply Error
What this means
The E1 error code on LG washing machines indicates a water supply issue. The washer has detected that water is not filling the tub at the expected rate, or no water is entering at all. Common causes include closed water supply taps, kinked inlet hoses, a clogged inlet filter screen, low household water pressure, or a faulty water inlet valve. This code can appear on both front-load and top-load LG washers, as well as WashTower washer units. On some newer LG models, E1 may also indicate an overflow condition where the water level sensor detects too much water in the tub.
Step-by-step fix
4 stepsCheck the water supply taps
Locate the hot and cold water taps behind the washer. Make sure both are fully open (turned counterclockwise). If only one tap is closed, the washer may fill too slowly and trigger the E1 code.
Even if you only use cold water cycles, both taps should be open — the washer may draw small amounts from both for optimal performance.
Inspect the inlet hoses
Check both the hot and cold water inlet hoses for kinks, bends, or pinches. Straighten any kinks. Disconnect the hoses and check the flow by holding them over a bucket and turning on the taps briefly.
If water flows strongly from the taps but not into the washer, the blockage is in the inlet valve or filter screens.
Clean the inlet filter screens
Turn off the water taps and disconnect both inlet hoses from the back of the washer. You will see small mesh filter screens inside the washer inlet ports. Carefully remove them with pliers and clean off any sediment or debris with a small brush under running water.
These screens catch sediment and mineral deposits from the water supply. In hard water areas, clean them every 6 months.
Check household water pressure
LG washers require a minimum water pressure of 14.5 PSI (1 bar). If other fixtures in your home also have low pressure, the issue is with your household water supply. Check if a main shut-off valve is partially closed or if there is a neighborhood water outage.
If low pressure is chronic, a booster pump can be installed on the washer's supply line.
When to call a professional
If water supply, hoses, and filter screens are all clear but the E1 code persists, the water inlet valve may be faulty and should be replaced by a technician. If E1 indicates an overflow condition on your model, the water level sensor (pressure switch) may need diagnosis.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Water Inlet Valve Assembly
Part #5220FR2075L · $30–$60
If the valve does not open electrically or is stuck closed
Inlet Hose Filter Screen
Part #5231FA2588S · $5–$10 (set)
If screens are corroded or cannot be cleaned
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