LG Washer Error Code 4Ed

The 4Ed code on an LG washer indicates a water supply temperature error during the dry cycle. The machine has detected that water temperature through the dry valve exceeded 70°C during a standard dry cycle, or exceeded 50°C during a Wool or Lingerie course. The washer stops the cycle as a protective measure. The fault can originate from a faulty temperature sensor, a malfunctioning dry valve, or an actual high-temperature water supply condition.

You should not continue running cycles while this error is active. The fault indicates that water temperatures during the dry cycle are outside safe operating limits, which could damage heat-sensitive fabrics or internal components. Stop using the machine until the root cause has been identified and corrected.

A power reset may temporarily clear the 4Ed code and allow the cycle to restart, but if the underlying fault condition still exists, the error will return. Resetting should only be used as part of diagnosing whether the problem is intermittent. A permanent fix requires identifying and correcting the actual cause, whether that is a faulty sensor, a valve problem, or a hot water supply issue.

Some causes of the 4Ed error are DIY-accessible, such as checking and adjusting your home water heater temperature or inspecting the wiring harness for visible damage. However, replacing the dry valve or the temperature sensor requires disassembly and comfort with appliance repair. If you are not experienced with appliance diagnostics, a qualified technician should handle sensor resistance testing and component replacement.

Repair costs depend heavily on the root cause. If the issue is simply a water heater setting adjustment, there is no parts cost involved. A replacement temperature sensor or thermistor typically costs somewhere in the range of $15 to $60 for the part alone. A dry valve replacement can range from $30 to $100 or more depending on the model. Adding professional labor, total repair costs commonly fall in the $100 to $300 range.