# How to Fix LG Error d80 (Airflow Blockage (80%))
The LG d80 error code is one of the most common issues on LG dryer units and LG washer/dryer combos. It is a critical safety and efficiency warning that you should address immediately.
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## 1. Explanation: What does the d80 Error Mean?
The “d80” code signifies a **severe airflow blockage of approximately 80%** within your dryer’s exhaust system.
Your LG machine uses a thermistor (temperature sensor) to monitor the air being expelled. If the air is too hot or the humidity takes too long to dissipate, the machine concludes that air cannot escape effectively.
When the d80 error appears, the dryer will typically shut down or pause the cycle because continued operation presents a fire risk and can severely damage the heating elements. The primary cause is almost always lint buildup or a crushed vent hose.
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## 2. Step-by-Step Fix: Diagnosing and Clearing the Blockage
**Safety First:** Always unplug the washing machine/dryer unit before moving it or performing maintenance on the exhaust ductwork.
### Step 1: Check the Lint Filter (The Basics)
While often overlooked, a saturated lint filter is the quickest way to restrict airflow.
1. Remove the filter and thoroughly clean it, scrubbing gently with warm water and a soft brush if it appears coated with fabric softener residue.
2. Ensure the cavity where the filter sits is also clear of any trapped lint.
### Step 2: Inspect the Exterior Vent Hood
Go outside to the wall where the dryer vent terminates.
1. **Check for Obstructions:** Ensure the damper flap (the small door that opens when the dryer runs) is not stuck closed, painted shut, or blocked by snow, leaves, or bird nests.
2. **Run the Machine:** Plug the machine back in briefly (without laundry) and run it on a low-heat air fluff setting. Go back outside to confirm that air is exiting the vent strongly and consistently. If the airflow is weak, the blockage is further in the system.
### Step 3: Inspect and Adjust the Flexible Vent Duct (The Most Common Culprit)
The flexible hose connecting the dryer to the wall is the most likely location for a blockage.
1. **Unplug the Unit and Pull it Out:** Slide the dryer far enough away from the wall to safely access the back.
2. **Examine the Hose:** Check the entire length of the flexible duct for kinks, severe bends, or crushing. If the hose is corrugated, lint can easily catch at the bends.
3. **Replace Crushed Hoses:** If the hose is severely crushed (often happens when the unit is pushed back too hard), it must be replaced. Use rigid metal ducting if possible, as it minimizes lint buildup and reduces fire risk compared to flexible foil or plastic ducts.
4. **Remove and Clean:** Disconnect the ducting from both the dryer and the wall. Use a long bottle brush or a vacuum hose attachment to clear all the lint from the inside of the duct.
### Step 4: Clean the Dryer Exhaust Port
Even with the external hose cleared, lint often builds up *inside* the machine where the duct connects.
1. **Locate the Exhaust Port:** This is the circular opening on the back of the dryer where the vent duct attaches.
2. **Vacuum the Port:** Use a long, narrow crevice tool on your vacuum cleaner to reach deep inside the machine’s exhaust port and remove any trapped lint clumps. This is a crucial step, as large “lint balls” often get stuck here.
### Step 5: Clean the Rigid Wall Duct (Internal Blockage)
If all the above steps fail, the blockage is likely in the rigid ducting that runs *inside* your wall or ceiling.
1. **Use a Vent Cleaning Kit:** You will need a specialized dryer vent cleaning kit, which uses flexible rods and a spinning brush that attaches to a power drill. Feed the brush through the duct from the exterior or interior access point to push the lint blockage out.
2. **Consider Professional Help:** If the duct run is very long, curved, or difficult to access (e.g., runs up through a second floor), hiring a professional dryer vent cleaner is recommended to ensure complete removal of the 80% blockage.
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## 3. Call to Action
If your flexible ducting is damaged, or you are switching to safer, rigid ducting, you may need a new connection kit.
Check the price for a replacement Dryer Vent Kit here: https://www.amazon.com/s?k=LG+Dryer+Vent+Kit&tag=trivian-20
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