LG Refrigerator Error Code dH R

The dH R code means the refrigerator compartment defrost cycle failed to raise the defrost sensor temperature above 10°C within 50 minutes of starting. This indicates a problem with the defrost heating circuit or related components. Possible causes include a failed defrost heater, a blown thermal fuse, a defective defrost sensor, a faulty heater relay, or a blocked drain. A poor door gasket seal can also contribute by allowing excessive frost buildup.

Resetting the refrigerator by unplugging it for a few minutes may temporarily clear the dH R code, but the error will return if the underlying defrost system problem is not repaired. The code is triggered by a real performance failure detected during the defrost cycle, so a reset alone is not a fix. Address the root cause first to prevent the code from recurring and to avoid ice buildup on the evaporator coils.

Repair costs depend on which component has failed. A replacement thermal fuse or defrost sensor is generally an inexpensive part, with DIY repair costs typically in the range of $10 to $40 for the part alone. A defrost heater assembly tends to run $30 to $80 in parts. If a control board replacement is needed due to a faulty heater relay, parts and labor combined can range from $150 to $350 or more depending on the model and service rates in your area.

Start by inspecting the door gasket for gaps or damage that could let in warm air. Next, test the defrost heater, thermal fuse (Fuse-M), and defrost sensor for continuity and correct resistance using a multimeter. If the heater or fuse has failed, replacing the faulty component should resolve the error. If those components test good, the heater relay on the control board may need evaluation.

Continued use with an active dH R error is not recommended for extended periods. Without a functioning defrost cycle, frost will accumulate on the evaporator coils and progressively restrict airflow, causing the refrigerator to lose cooling capacity. Food safety can become a concern if temperatures rise. It is best to diagnose and repair the defrost system as soon as possible.