LG Dishwasher Error Code 00:E4

The 00:E4 code on an LG dishwasher indicates a steam generator error, specifically that the generator heater temperature is reading below 158°F. The dishwasher monitors the steam generator using a thermistor, and when that temperature threshold is not met, the control board flags this fault. The two primary components to inspect are the heater element and the thermistor.

It is not recommended to continue running the dishwasher with the 00:E4 error present. The code indicates the steam generator is not operating correctly, and running cycles in this state can result in incomplete cleaning and potential stress on other components. Resolve the fault before resuming normal use.

A reset may temporarily clear the 00:E4 code, but it will return as soon as the dishwasher attempts a steam cycle and the heater temperature again fails to reach 158°F. Resetting does not address the underlying fault in the heater element, thermistor, or wiring. A proper repair of the defective component is required to permanently resolve the error.

Some causes of the 00:E4 code are accessible to knowledgeable DIYers. Checking wiring connections for corrosion or looseness requires only basic tools and no parts. Testing the heater element and thermistor with a multimeter is also manageable if you are comfortable working with appliance components. However, replacing internal steam generator parts involves working near the heating system and electrical components, so anyone unfamiliar with appliance repair should consider hiring a technician.

Repair costs depend on which component has failed. A replacement thermistor is typically a lower-cost part, often in the range of $15 to $50, while a steam generator heater element or complete steam generator assembly can range from $60 to $200 or more depending on the model. Adding professional labor costs, a full repair could range from $100 to $350 or higher depending on your location and the parts required.