LG · Refrigerator (Top Freezer)

LG Refrigerator (Top Freezer) dH error code

Difficulty: Hard · Cost: $100–$300 · Duration: 2m

The dH error means your LG refrigerator attempted to run a defrost cycle but could not raise the evaporator temperature to the required level within one hour. This can appear in different variations depending on the model. The defrost system is responsible for melting frost that builds up on the evaporator coils — when it cannot complete this process the coils can ice over and reduce cooling efficiency. A reset sometimes clears a temporary fault but a recurring dH error usually points to a problem with the defrost heater, thermostat, or sensor that needs professional attention.

Common causes

Defrost heater has malfunctioned or failed and cannot generate enough heat
Defrost thermostat is faulty and not allowing the heater to activate
Defrost sensor is providing incorrect temperature readings
Excessive frost buildup on the evaporator coils blocking heat distribution
Temporary electronic glitch causing a false defrost timeout

How to fix it

1

Unplug the refrigerator from the outlet and wait 2 minutes
2

Plug it back in and allow the unit to run a fresh defrost cycle
3

Monitor the unit to see if the dH error returns
4

If dH keeps appearing after resetting contact a technician to inspect the defrost heater, thermostat, and sensor