LG refrigerator / defrost system
LG Refrigerator dH Error: Defrost Checks and Repair Cost
The LG refrigerator dH error points to a defrost problem where the evaporator did not reach the expected temperature during defrost.
Quick answer
What it means
The LG refrigerator dH error is a defrost-related signal. Temperature history, frost buildup, fans, sensors, and heater circuits may be involved.
Typical repair$180-$520
UrgencyHigh
Repair or replaceQuote first if cooling is affected or frost returns after reset.
Likely causes
- Defrost heater issue
- Defrost sensor issue
- Control board issue
- Airflow blocked by frost buildup
Safe first checks
- Record refrigerator and freezer temperatures.
- Look for heavy frost on the freezer back panel.
- Move food if temperatures are unsafe.
- Use the model support page before internal defrost testing.
Likely parts and repair cost
Typical repair range: $180-$520. Parts or systems commonly considered:
- Defrost heater
- Defrost sensor
- Control board
- Evaporator fan
Stop and call a pro when
- Food temperature has been unsafe.
- Ice buildup blocks the fan.
- Water leaks near controls or wiring.
Source trail
This guide starts with manufacturer support, public recall lookup, or safety references, then turns those sources into plain-language checks.
Questions people ask
Does dH mean the refrigerator is unsafe?
The code itself is a defrost fault, but food safety depends on actual temperatures and how long cooling was affected.
Can I just unplug it?
A reset may be part of official guidance, but recurring dH needs diagnosis.