Error code · Refrigerator

LG Refrigerator Codes dH, FdH and dHF: Freezer Defrost

dH, FdH, and dHF appear on LG refrigerators with an LED or LCD temperature display, and the family is grouped with Er dH, d1, d2, d, H1, and H2. They report a defrost problem in the…

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Code: dH, FdH, dHF
Appliance: Refrigerator
Brand: LG
Warranty: 30-day workmanship

What dH, FdH, dHF means

dH, FdH, and dHF appear on LG refrigerators with an LED or LCD temperature display, and the family is grouped with Er dH, d1, d2, d, H1, and H2. They report a defrost problem in the freezer: the temperature does not rise as expected after a defrost starts. Named causes are ice build-up, a blocked drain, a blown thermal fuse, the defrost heater, or the main board. Owners often see frost on the back panel and soft food.

Common causes of dH, FdH, dHF

Ice build-up around the evaporator
Blocked defrost drain
Thermal fuse and defrost heater
Main board defrost output

✓ One safe check you can try

1. Remove the food and move it to a cooler. 2. Unplug the refrigerator and leave both doors open for at least 12 hours. 3. Wipe up the melted water and keep the floor dry. 4. Plug it back in and watch whether the code returns. 5. If it does, request service.

! Why to stop there

A manual defrost clears ice but does not show whether the heater, fuse, drain, or board caused it.
We test the defrost parts one by one and give a written price first.
Repairs are backed by a 30-day workmanship warranty.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Refrigerator codes

OdLG Refrigerator Code Od: Wi-Fi Module Link OFFMessage "OFF" on LG Refrigerators r2LG Refrigerator Code r2: Lower Compartment Sensor rFLG Refrigerator Code rF: Fresh-Food Fan Motor rSLG Refrigerator Code rS: Upper Sensor Open or Shorted rTLG Refrigerator Code rT: Room Temperature Sensor SbLG Refrigerator Code Sb: Sabbath Mode On Sd, CI, IU, d1, d2, d, H1, H2, US, LS, E1, E2, r, Id, gSLG Refrigerator Codes Sd, CI, IU and 12 Others: Self-Check Group

dH, FdH, dHFdH, FdH, dHF questions

Will defrosting at home fix dH?

It can clear the ice for a while, and it is the step to try first. If the code returns, the defrost system still has a cause that we need to find and test before anything is replaced.

What is the thermal fuse?

It is a safety part in the defrost circuit that can open and stop the heater from working. If it is open, the heater cannot melt the frost, and ice builds up again on the evaporator.

How long can food stay in the freezer?

Not long if ice is blocking the airflow. Check the freezer temperature and move food to a cooler if it softens while you wait for the visit, since refrozen items lose quality.

Book a visit

Still seeing dH, FdH, dHF?

A technician diagnoses it on site and gives you the price in writing before any work starts.

(713) 597-5662