LG Refrigerator Error Code Er Wt — What It Means & How to Fix It

What Does This Error Mean?

The Er Wt error means your LG refrigerator has a water temperature sensor fault. This sensor monitors the temperature of water in the internal water supply line. Ice maker performance and water dispenser temperature may be affected.

Affected Models

LRMVS3006S
LRFXS2503S
LRFDS3006S
LG French door refrigerators with in-door water dispensers

Common Causes

Water temperature sensor has failed
Sensor wiring is loose or damaged
Water supply line is frozen, affecting sensor readings
Water line is kinked, reducing flow and causing temperature irregularities
Control board fault not reading the sensor signal

How to Fix It

Unplug the refrigerator for 60 seconds.

This resets the sensor circuit. Plug back in and check if the error clears.
Check the water supply line at the back of the fridge for kinks or damage.

A kinked line reduces water flow and can cause temperature sensor errors.
Make sure the freezer temperature is set correctly.

If the freezer is too cold, the water line can freeze and trigger sensor errors. Set it to 0°F (-18°C).
Test the water dispenser after the reset.

If water flows normally and the error is gone, it was a temporary issue.
If Er Wt returns, contact LG support or a certified technician.

The water temperature sensor or its wiring needs professional replacement.

When to Call a Professional

If a reset and water line check don't resolve Er Wt — the sensor needs replacing. This typically requires accessing the water supply system inside the fridge door. Expect repair costs of $100–$230 including parts and labor. Contact LG support or a qualified technician.

Frequently Asked Questions

Will my LG refrigerator ice maker stop working with the Er Wt error?

Possibly — if the water temperature sensor is faulty, the ice maker may stop producing ice. The water dispenser may also be affected. Cooling in the main compartments should continue normally.

Can freezing temperatures cause the Er Wt error?

Yes. If the freezer is too cold, the internal water supply line can freeze. This causes the water temperature sensor to read out of range. Adjusting the freezer to 0°F (-18°C) and letting it thaw usually resolves it.

How much does an LG refrigerator water temperature sensor replacement cost?

The sensor part typically costs $20–$50. With professional labor, total repair is $100–$230. Always have a technician confirm the diagnosis before replacing parts.