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Source-backed error-code guide

Reviewed

LG Refrigerator dH / F dH / r dH / Er dH Error Code

The dH family points to a defrost process that did not complete as expected. Homeowner action should stay limited to recording the code, food-safe power handling, visible door and vent checks, and stopping before drain, heater, fuse, sensor, board, or sealed-area work.

Applies to LG refrigerator with digital or led error display

What the appliance detected

Detected condition

LG identifies dH as a defrosting failure: the expected compartment temperature was not detected during defrost.

What may contribute

Possible causes

  • Ice accumulation or a blocked drainage path may prevent normal defrost temperature detection.
  • LG lists temperature fuse, heater, or main PCB concerns as possible service causes.
  • Blocked interior vents, poor door closure, or leveling/door alignment issues can contribute to frost buildup.

Start conservatively

Safe preliminary checks

Work in order and stop whenever a step is not supported by the documentation for your model.

  1. Record the exact dH variation and model

    • Photograph or write down whether the display shows dH, F dH, r dH, Er dH, FdH, or dHF.
    • Confirm the full model number and owner manual before using any model-specific reset or defrost guidance.

  2. Protect food and surrounding surfaces

    • If the refrigerator will be unplugged or doors left open, move temperature-sensitive food to safe cold storage.
    • Use dry towels only for accessible water. Keep water away from outlets, cords, controls, and floors where someone could slip.

  3. Check visible door and airflow conditions

    • Make sure doors close completely, gaskets appear seated, and food is not blocking visible interior vents.
    • Do not remove panels, force drains open, or access the evaporator area.

  4. Use only documented external power handling

    • LG documentation includes unplugging the refrigerator briefly to reset the unit and, in some contexts, allowing frost to melt with doors open.
    • If the code persists after the supported step or the food/water risk is not manageable, request service.

Actions not recommended

  • Do not remove freezer or refrigerator panels, chip ice, pour hot water into hidden drains, use a heat gun, or access the evaporator.
  • Do not test or replace defrost heaters, fuses, sensors, wiring, boards, or sealed-system components.
  • Do not continue operating the refrigerator if temperatures are unsafe or water is reaching electrical parts.

When to stop and request service

  • Request LG service if the dH code persists or returns after the documented external steps.
  • Request service if a drain, heater, fuse, sensor, wiring, board, or internal frost condition is suspected.
  • Stop immediately for electrical warning signs, unmanaged water, spoiled-food risk, or any step requiring disassembly.

Documented source

Official information reviewed

Our summary is based on manufacturer support material and stays within the limits of that material.

Source reviewed by Appliance Help HQ: August 17, 2026.

Appliance Help HQ is an independent informational site and is not affiliated with or endorsed by LG.

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