Written by
Maya Chen Editorial TeamPublished September 5, 2026Updated October 20, 2026
Error codedH (FdH, dHF, Er dH)
ApplianceRefrigerator
Quick answer
dH on an LG refrigerator is a defrost fault: the defrost sensor did not warm up enough after defrost began. It can also show as FdH, dHF or Er dH.
Model compatibility: LG reuses codes across series and model years, so dH (FdH, dHF, Er dH) may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Defrost heating fault: the defrost sensor did not rise more than 5 degrees Celsius within 80 minutes of defrost start.
The dH code on an LG refrigerator means the defrost system is not heating as it should. You may also see it written FdH, dHF or Er dH. LG lists it for refrigerators without naming a series.
What triggers it
One LG guide says the defrost sensor has not warmed by more than 5 degrees Celsius within 80 minutes of defrosting starting. The evaporator may then be blocked by ice formed from moisture in the air. On analog panels the lit LEDs are -15°C, -17°C, -18°C and -20°C.
What the manual suggests
Unplug the refrigerator for 2 minutes to reset it.
Let the system run a defrost again.
If the code returns, arrange service.
LG’s longer guide names likely causes that only a technician checks: ice buildup, a blown thermal fuse, a failed heater or a main board problem, plus the defrosting resistor, heating relays and a clogged drain.
Cycle Error: possible poor cooling that needs inspection
FF: a freezer fan fault where frost is a common cause
Repair for your LG refrigerator in Los Angeles
An LG refrigerator showing dH in Los Angeles can be booked in at (310) 742-8008. Read out the code and the model number, and say what you tried first. See also LG refrigerator repair.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your LG appliance?
Book a specialist visit for a clear estimate and approval before any repair.
