Defrost system error
What it means
On LG refrigerators, Er dH usually indicates the defrost cycle did not complete, often due to the defrost heater or its sensor. The meaning can vary by model, so check the manual for your fridge.
Symptoms3
- Heavy frost on the freezer back wall.
- Weak cooling in the fridge section.
- Water or ice under the freezer drawer.
Possible causes4
- Failed defrost heater.
- Failed defrost sensor or thermal fuse.
- Wiring or control board fault.
- Frequent door opening or a poor seal increasing frost.
How to diagnose and fix4
- Remove food and unplug the fridge for a full day to defrost.
- Check the door seal is intact and closes well.
- Have a technician test the heater and sensor and replace the faulty part.
- Never chip at the ice with sharp tools; you could puncture the refrigerant tubing.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
The heater and sensor are mid-priced parts, and the job involves removing the freezer back panel.
Prices are rough estimates including the part and the technician’s fee, and vary with brand, model and part source.
Frequently asked questions
Can I use a hair dryer to defrost?
Best avoided near water and plastic parts; leaving the fridge unplugged is the safer way.
Will the frost come back?
Yes, if the fault is not fixed it will build up again within days.
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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