LG Dryer Error Code drn — Drain Obstruction (Ventless/Heat Pump)
What this means
The drn error code appears on LG ventless and heat pump dryers when the drain hose or internal drain path is blocked. These dryers remove moisture from clothes and channel it through a drain system. If the drain hose is kinked, crushed, clogged, or frozen, this code will appear.
Alternate codes: DRN
Step-by-step fix
4 stepsCheck the drain hose
Inspect the drain hose from the back of the dryer. Straighten any kinks and ensure the hose is not crushed or pinched behind the dryer.
Clear the hose
Disconnect the drain hose and flush it with warm water to clear any lint or debris buildup inside.
Use LG standard drain hose
Ensure you are using the standard LG drain hose that came with the dryer. Aftermarket hoses with different internal diameters may cause drainage issues.
Thaw if frozen
In cold climates, the water inside the drain hose or sump can freeze. Apply warm towels or a hair dryer (on low heat) to thaw the hose.
When to call a professional
If the internal drain pump or sump is clogged and inaccessible, a technician can disassemble and clean the internal drainage system.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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