What does Er dH mean on a LG refrigerator?

Er dH means: Defrost heater failure. The most likely parts involved are defrost heater, thermostat.

How much does it cost to fix Er dH?

A typical defrost system repair (heater / motor) costs about $110–$420 nationally, parts and labor included. This is a reference range, not a quote — local prices vary.

Is my food safe if my LG fridge shows Er dH?

Often yes at first, because the fridge usually keeps cooling for a while. Watch the temperatures. If the fridge section rises above 40°F, move perishable food to a cooler or another fridge.

Will manually defrosting the fridge clear the Er dH code?

Unplugging the fridge and letting the ice melt can restore cooling for a short time. But if a part has failed, the frost and the code will come back. It is a stopgap, not a fix.

Error codes › Refrigerator › LG

LG Refrigerator Er dH Error Code

Defrost heater failure

What's going on

On an LG refrigerator, Er dH means the defrost system is not working right. Usually the defrost heater or a related thermostat has failed, so frost builds up on the cooling coils. The fridge may keep running for a while, but cooling will get worse, so plan to have it repaired soon.

Behind a panel in the freezer, cold coils pull heat out of the air. Over time, frost forms on these coils. A few times a day, the fridge turns on a small defrost heater to melt that frost away. A thermostat or sensor near the coils tells the system when the coils are warm enough to stop.

The control board watches this defrost cycle. If the coils do not warm up as expected, it shows Er dH. Without defrosting, ice keeps building on the coils and blocks airflow. That can make the fridge section warm while the freezer still seems cold.

Error codes can vary between model generations. Check your model number, usually on a label inside the fridge, against your owner's manual to confirm what this code means for your unit.

Likely causes

defrost heater — The heater can burn out or break over time. When it no longer warms up, frost is never melted off the coils and the control board flags the error.
thermostat — The defrost thermostat lets power reach the heater only when the coils are cold. If it fails, the heater may never turn on even if the heater itself is fine.

The same code can mean different things on different model generations. Check the model number on your refrigerator's rating plate before ordering parts.

Can you fix it yourself?

Hard to do yourself. Most people end up calling a technician.

Safe things to check first

Look at the back wall of the freezer for heavy frost or ice. A thick frost layer there points to a defrost problem.
Power-cycle the fridge. Unplug it or switch off its breaker for a few minutes, then restore power and see if the code comes back.
Make sure the doors close fully and the gaskets seal well. A door left ajar adds moisture and frost, which strains the defrost system.
Check that vents inside the freezer and fridge are not blocked by food. Keep the fridge unplugged or the breaker off before reaching deep inside.

When to call a technician

If the code returns after a power cycle, or you see heavy frost on the back freezer wall, call a qualified appliance technician. Testing and replacing defrost parts means removing interior panels and checking electrical parts, so most owners leave this repair to a professional.

What the repair usually costs

$110–$420

Defrost system repair (heater / motor), parts and labor — national reference range

Confidence: medium (based on 2 cost guides). Plus a service call fee of about $50–$100, often credited toward the repair.

This is not a quote. Prices vary by region and by model.

Repair or replace?

Repair usually makes sense. Even the high end of this repair stays under $720, about half the price of a typical new refrigerator.

A typical new refrigerator costs about $600–$2,300.

Check your refrigerator — free, 2 minutes

Common questions

What does Er dH mean on a LG refrigerator?: Er dH means: Defrost heater failure. The most likely parts involved are defrost heater, thermostat.
How much does it cost to fix Er dH?: A typical defrost system repair (heater / motor) costs about $110–$420 nationally, parts and labor included. This is a reference range, not a quote — local prices vary.
Should I repair or replace my refrigerator?: Repair usually makes sense. Even the high end of this repair stays under $720, about half the price of a typical new refrigerator.
Can I fix Er dH myself?: Hard to do yourself. Most people end up calling a technician.
Is my food safe if my LG fridge shows Er dH?: Often yes at first, because the fridge usually keeps cooling for a while. Watch the temperatures. If the fridge section rises above 40°F, move perishable food to a cooler or another fridge.
Will manually defrosting the fridge clear the Er dH code?: Unplugging the fridge and letting the ice melt can restore cooling for a short time. But if a part has failed, the frost and the code will come back. It is a stopgap, not a fix.