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LG Refrigerator Error Code Er dH
Defrost heater error. Er dH means the defrost sensor did not warm by more than 5°C within 80 minutes of starting defrost. LG says the evaporator may be blocked by ice and the defrost heater, thermal fuse or relay may have failed, or the drain may be clogged.
- Code: Er dH (also shown as dH, FdH, dHF)
- Appliance: LG refrigerator
- Owner fix: Usually needs a technician. Do the safe checks on this page, then book service if the code returns.
- Repair cost: call for a quote
- Checked against the manufacturer sources below on October 27, 2026
Likely causes
- Failed defrost heater or thermal fuse
- Heater relay fault
- Clogged defrost drain
- Heavy ice on the evaporator coils
Safe checks you can do
Safety: Owner checks only. Do not open the sealed refrigerant system, remove electrical covers, or bypass parts. Compressor and refrigerant work needs a licensed technician.
- Look for frost on the back wall of the freezer and water or ice under the crisper drawers.
- Move food to coolers if temperatures rise.
- LG lists this as a service code; a manual defrost may help temporarily but the part usually needs replacing.
When to call a pro
- Any time this code appears
- Frost keeps coming back after a manual defrost
- Any time you smell burning or gas, see sparks, or would need to open a panel
What does it cost to fix?
Call for a quote. Repair costs depend on the brand, the model, the part and the shop, so this site does not publish price ranges. Ask each shop for its diagnostic or trip fee and a written quote after diagnosis. See what affects repair cost.
Sources
Codes and steps vary by model. Your owner's manual and the model sticker inside the door or on the back are the final word for your exact unit.
Other LG fridge codes
Refrigerator codes from other brands
See also: Refrigerator help in Idaho · Fridge not cooling · Freezer works, fridge warm · Ice maker not working · Fridge leaking water · All error codes
FAQ
What does LG error code Er dH mean?
Defrost heater error. Er dH means the defrost sensor did not warm by more than 5°C within 80 minutes of starting defrost. LG says the evaporator may be blocked by ice and the defrost heater, thermal fuse or relay may have failed, or the drain may be clogged.
Can I fix LG code Er dH myself?
Usually needs a technician. Do the safe checks on this page, then book service if the code returns. Owner checks only. Do not open the sealed refrigerant system, remove electrical covers, or bypass parts. Compressor and refrigerant work needs a licensed technician.
How much does it cost to fix LG code Er dH?
Call for a quote. Repair costs depend on the brand, the model, the part and the shop, so this site does not publish price ranges. Ask each shop for its diagnostic or trip fee and a written quote after diagnosis.
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