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LG Dryer d80 Error Code
Exhaust vent ~80% restricted
Applies to: All models with FlowSense duct blockage sensor. May also appear as d75.
What's going on
On LG dryers with the FlowSense duct blockage sensor, d80 means the dryer has detected that its exhaust vent is severely blocked. This is a fire risk, because trapped heat and lint can ignite. Stop using the dryer, unplug it or switch off its breaker, and have the vent system inspected and cleared by a qualified professional before using it again.
LG's FlowSense system watches how well hot, damp air leaves the dryer. When air cannot escape easily, the dryer senses the restriction and shows a code. The d80 code means the airflow is severely restricted. LG uses d80, d90 and d95 for increasing levels of blockage.
A blocked vent matters because the dryer keeps making heat while the air has nowhere to go. Lint is very flammable, and it builds up in the duct and around the heater. Heat plus trapped lint is a common cause of dryer fires. A blocked vent also makes clothes take much longer to dry.
This code applies to LG dryers that have the FlowSense duct blockage sensor. Code meanings can differ between model generations, so confirm with your dryer's model number and owner's manual.
Likely causes
- exhaust vent duct — Lint builds up inside the duct over time, and long runs, sharp bends, or crushed sections trap even more. This narrows the path for hot air and triggers the code.
- lint filter — A clogged or damaged lint filter limits airflow at the start of the exhaust path. A damaged filter can also let lint pass into the duct and build up there.
- exterior exhaust hood — The vent cover on the outside wall can get clogged with lint, stuck shut, or blocked by debris, nests, or snow. Air then cannot leave the house, and the dryer senses the restriction.
The same code can mean different things on different model generations. Check the model number on your dryer's rating plate before ordering parts.
Can you fix it yourself?
Usually a straightforward DIY fix.
When to call a technician
Because d80 signals a fire risk, stop using the dryer, keep it unplugged or its breaker off, and call a qualified appliance technician or dryer vent cleaning professional now. Do not run the dryer again until the full vent system has been inspected and cleared.
What the repair usually costs
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 $500, about half the price of a typical new dryer.
A typical new dryer costs about $800–$1,200.
Common questions
- What does d80 mean on a LG dryer?
- d80 means: Exhaust vent ~80% restricted. The most likely parts involved are exhaust vent duct, lint filter, exterior exhaust hood.
- Is it safe to keep using the dryer?
- This code can mean the appliance is overheating. Turn it off at the circuit breaker (or unplug it if you can do so safely) and call a qualified technician. Do not try to diagnose or repair this yourself.
- How much does it cost to fix d80?
- A typical overheating / vent blockage repair costs about $100–$250 nationally, parts and labor included. This is a reference range, not a quote — local prices vary.
- Should I repair or replace my dryer?
- Repair usually makes sense. Even the high end of this repair stays under $500, about half the price of a typical new dryer.
- Can I fix d80 myself?
- Usually a straightforward DIY fix.
- Can I keep using my LG dryer while it shows d80?
- No. The d80 code means the vent is severely blocked, which can cause overheating and a lint fire. Unplug the dryer or switch off its breaker, and wait until a qualified professional has cleared the vent.
- Why is a blocked dryer vent dangerous?
- Dryers make a lot of heat, and lint catches fire easily. When the vent is blocked, heat and lint stay trapped inside the dryer and duct. That raises the chance of a fire and can also damage dryer parts.