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Error code reference

LG Refrigerator Error Code E-dH

Defrosting malfunction

LG codesLG refrigerator codes

Defrosting malfunction - 2 hours after defrosting starts, the defrost sensor is not at or above 50°F (10°C). Possible temperature fuse open, heater open, drain clogged, or heater relay malfunction.

First step from the service manual

Check defrost heater circuit, temperature fuse, drain, and relay.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What E-dH means on a LG refrigerator

The E-dH error code on an LG refrigerator indicates a defrost system malfunction. Specifically, the control board triggers this code when the defrost sensor fails to reach or exceed 50°F (10°C) within two hours of a defrost cycle starting. The defrost system relies on a heating element to melt frost buildup on the evaporator coils, and a sensor monitors the temperature rise to confirm the cycle is working correctly. When that temperature threshold is not met in time, the board flags the cycle as failed and displays E-dH.

Four primary components are implicated in this fault. The temperature fuse is a one-time thermal cutoff that opens permanently if it overheats, breaking the circuit to the heater. The defrost heater itself can fail due to a broken element or open circuit. The heater relay on the control board can malfunction, preventing power from ever reaching the heater. Finally, a clogged or frozen drain can cause ice accumulation severe enough to interfere with the cycle's progress and sensor readings.

Diagnosing this code starts with the defrost heater circuit. A technician should check continuity across the heater and the temperature fuse using a multimeter. An open reading on either component confirms a failure. The relay can be tested by checking for proper voltage output from the control board during an active defrost cycle. The drain tube should be inspected for ice blockages and cleared if necessary before replacing any parts.

Source: manufacturer service documentation.

Common causes of E-dH

  1. 01

    Open Temperature Fuse

    Part replacement

    The thermal fuse is a one-time safety device that permanently breaks the circuit if it overheats. Test it with a multimeter for continuity; a reading of no continuity confirms it has blown and must be replaced.

  2. 02

    Failed Defrost Heater

    Part replacement

    The defrost heater element can burn out over time, leaving the circuit open and no heat generated during the defrost cycle. Continuity testing across the heater terminals will confirm an open element.

  3. 03

    Heater Relay Malfunction

    Part replacement

    The heater relay on the control board controls power delivery to the defrost heater. If the relay fails, voltage never reaches the heater even if the heater itself is functional. Check for proper voltage output at the relay during a defrost cycle.

  4. 04

    Clogged or Frozen Drain

    Wiring / connection

    A blocked drain tube can allow ice to accumulate around the evaporator area, preventing normal defrost cycle progress and keeping the sensor from reaching the required temperature. Inspect the drain for ice or debris and clear it as needed.

See the test procedure for each cause

Frequently asked questions about E-dH

What does E-dH mean on a LG refrigerator?
E-dH means the defrost system failed to bring the defrost sensor temperature up to 50°F (10°C) within two hours of starting a defrost cycle. The refrigerator's control board monitors this temperature rise as confirmation that the defrost heater is working. When the threshold is not met, the board logs E-dH and alerts you to a problem in the defrost circuit. Common culprits include an open temperature fuse, a failed heater, a bad relay, or a clogged drain.
Can I fix the E-dH error myself?
Some steps, like inspecting and clearing a clogged or frozen drain tube, can be done by a careful DIYer. However, testing components like the defrost heater, temperature fuse, and heater relay requires a multimeter and comfort working with electrical components. Replacing a blown temperature fuse or failed heater is a moderate repair that many experienced DIYers can complete, but if you are not confident working around appliance wiring, a professional technician is the safer choice.
Is it safe to use my LG refrigerator when E-dH is displayed?
When E-dH is active, the defrost cycle is not completing properly, which means frost can build up on the evaporator coils over time. Excessive frost buildup will eventually restrict airflow and cause the refrigerator to lose cooling efficiency. While the unit may still run for a period, food safety could be compromised if temperatures rise. It is best to address the fault promptly rather than continue using the refrigerator without repair.
Will resetting the refrigerator clear the E-dH code?
Unplugging the refrigerator or resetting it may temporarily clear the E-dH code from the display, but the code will return once the next defrost cycle runs and the same failure condition is detected. A reset does not fix the underlying problem. The defrost heater circuit, temperature fuse, relay, and drain all need to be inspected and repaired before the error will clear permanently.
How much does it cost to repair an LG refrigerator E-dH error?
Repair costs depend on which component has failed. A replacement temperature fuse or defrost heater is generally an affordable part, with parts typically ranging from $15 to $60 depending on the model. If the control board relay has failed and the board needs replacement, costs can range from $150 to $350 or more for the part alone. Adding professional labor, a full repair service call can range from $100 to $400 or higher depending on your location and the specific diagnosis.

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