LG Refrigerator Error Er AV — What It Means & How to Fix It

What Does This Error Mean?

Er AV on an LG refrigerator indicates a fault with the air damper valve or airflow damper assembly. The air damper is a small motorized or temperature-controlled flap that regulates cold air flow between the freezer and fresh food compartments. When the damper is stuck open, the fridge section becomes too cold. When stuck closed, the fridge warms up. Er AV means the damper control circuit or motor is not responding correctly.

Affected Models

LRMVS3006S
LRFXS2503S
LRFWS2906S
LRMDC2306S
Most LG French door refrigerators with electronic air damper controls

Common Causes

Damper motor or actuator has failed — the motorized flap cannot open or close on command
Ice has formed around the damper mechanism — the flap is physically frozen in one position
Wiring to the damper motor is broken or the connector has pulled loose
Damper position sensor has failed — the control board cannot verify the damper's current position
Control board output driving the damper has failed — the board cannot command the damper to open or close

How to Fix It

Determine whether the fridge is too cold or too warm. A fridge compartment that is below 30°F indicates the damper may be stuck open (too much cold air from the freezer). A compartment above 45°F suggests the damper is stuck closed.

This symptom assessment directs the diagnosis. Both stuck-open and stuck-closed dampers can cause Er AV.
Perform a power reset. Unplug the refrigerator for 5 minutes and restart. A damper that was stuck due to a controller error or temporary ice formation may free itself and reset during the power-down period.

If the temperature stabilizes after a reset and Er AV does not return, a transient fault was the cause.
Run a forced defrost cycle. Hold the Refrigerator and Ice Plus buttons together for 5 seconds to start forced defrost on most LG models. If ice was holding the damper flap closed or open, defrosting may release it.

Consult your specific model's manual for the exact forced defrost button combination — it varies by model series.
Listen for the damper actuator working. When the refrigerator is running, you can sometimes hear a faint clicking or buzzing sound from the back wall of the fridge compartment when the damper adjusts. No sound at all during temperature adjustment cycles suggests the actuator motor has failed.

The damper sound is subtle — you may need to stand quietly beside an open fridge to hear it.
If defrost and reset do not resolve Er AV, the damper assembly needs replacement. The entire damper unit — including the actuator motor, flap, and housing — is typically replaced as a single assembly. Contact LG support or a technician with your model number.

Damper assemblies are model-specific. Always verify part compatibility using the full model number before ordering.

When to Call a Professional

Air damper assemblies are located in the back wall between the fridge and freezer sections. Access requires removing interior shelves and panels. Expect $100 to $250 for diagnosis and damper replacement at a service center.

Frequently Asked Questions

What does the air damper do in a refrigerator?

The air damper is a flap that controls how much cold air flows from the freezer into the fresh food compartment. The freezer is always colder than the fridge target temperature. By opening and closing the damper, the control board regulates fridge temperature precisely without running a separate cooling system. It is a simple but critical component for fridge temperature accuracy.

Can a stuck-open damper freeze my vegetables?

Yes — if the damper is stuck fully open, the fridge receives constant maximum cold air from the freezer. This can drop fridge temperatures well below freezing, which freezes produce, eggs, dairy, and other fridge items. If you notice frozen items in your fridge drawer, check for a stuck-open damper immediately.

Is Er AV dangerous to ignore?

You should address it within a few days. A stuck-closed damper will cause fridge temperatures to rise and risk food spoilage. A stuck-open damper will freeze fridge items and may cause condensation and ice buildup issues. Neither condition is safe for food storage over time.