LG Dryer d80 Error
LG's UK list treats d80 as the classic signal to have the yearly vent cleaning done by a professional vent cleaner. Two or four Flow Sense bars mean the same restriction in bar form.
What to check first
- Read the number: d80 means LG's Flow Sense estimates the exhaust is approximately 80% restricted (LG US/UK lists).
- Gas dryer and not heating? LG says d80 can mean a lack of gas supply — check the valve and line too.
- Clean the lint filter — LG UK's method: warm water and a soft brush, dried fully before refitting.
- Check the hose behind the dryer and the outside outlet before suspecting the in-wall duct.
- Still showing? LG's endpoint is a professional vent cleaning — the yearly one, brought forward.
A d80 code means LG's Flow Sense system estimates the dryer's exhaust is approximately 80% restricted. LG files d80 with d75, d90 and d95: the hot, humid air has to vent somewhere, or the moisture stays in the drum. LG's Flow Sense guidance is explicit that these are safety alerts, not dryer malfunctions — and its UK list adds the practical reading: a d80 is typically the signal to have the yearly vent cleaning completed by a professional vent cleaner. One exception matters before you book anyone: on gas dryers, LG says a d80 may indicate a lack of gas supplied to the unit — the gAS page covers that path.
Safety first
- A restricted exhaust is a heat problem before it is a drying problem: LG's Flow Sense guidance says poor venting can cause the dryer to shut down to prevent it from overheating and becoming a fire hazard.
- Work on the duct with the dryer unplugged where you are disconnecting anything, and never run the dryer with the exhaust hose detached indoors — the moisture and lint it carries belong outside.
- If you smell gas or suspect a gas leak, do not operate the dryer, unplug it, operate electrical switches, or attempt a reset. Leave the area and contact your gas emergency service from a safe location.
- Stop condition: stop using the machine and unplug it — and do not run it again until it has been checked — if you smell burning, see smoke, find damaged electrics (a scorched plug, a melted or cut cable), or water is leaking in quantity.
Common causes
Lint — in the filter first, then in the duct
LG's first check for the family is lint buildup at the rear exhaust duct, which it names as a cause of long drying times. The filter catches most lint; the rest coats the duct run load by load until the restriction triggers a Flow Sense warning.
A crushed or kinked exhaust hose
LG's US list: a crushed or damaged exhaust duct will also cause air blockage — dryers get pushed back onto their own hose, and LG's UK steps check for crushing, denting, kinking, coiling and holes before anything inside the walls is suspected.
Gas dryers only: no gas supply
LG's US list states it plainly: on gas dryers a d80 display code may indicate a lack of gas supplied to the unit. If your gas dryer shows d80 and is not heating, check the gas path (the gAS page) alongside the vent path.
Step-by-step checks
- Inside the dryer: clean the lint filterRemove lint from the lint tray between each load. Clean the tray with warm water and a soft brush, then allow it to dry before reinstalling. Reduce the load size to allow air to pass through from back to front. (LG UK's order.)
- Behind the dryer: check the exhaust hoseCheck that the exhaust hose between the dryer and the wall is not crushed, dented, kinked or compressed; verify it is not coiled circle over circle like a spring; confirm there are no holes in the hose and no loose connections. LG gives the same instruction for rigid, semi-rigid and flexible duct.
- Outside the home: check the exhaust outletLocate the exhaust outlet on the outside of your home — it may have flappers, a cage or mesh to block animals and debris. Verify the flappers can open all the way (they can jam with lint): run the Air Dry cycle and you should see them fully opened. Remove any visible lint around the exhaust.
- Inside the walls: the hidden duct runIf steps 1–3 did not resolve the code, LG's endpoint is a dryer duct cleaner in your area to clean the vents located in your house. While they are on site, LG asks you to get two figures from them: the length of the ventilation system from the dryer to the outside exhaust, and the number of 90-degree angles within it — those determine whether the run itself needs modifying.
When to call a technician
LG's endpoint for d80 is a local vent cleaning company — its UK list frames the code as the yearly-cleaning signal. An appliance technician enters only if the duct is proven clean and the code still posts: LG's Flow Sense guidance notes the blower fan may then be defective, which is an LG service case.
Quote the exact code — d80. On gas models, tell LG or the qualified service provider whether the dryer heats. That information can help evaluate the gas-supply possibility alongside the vent restriction.
Model differences
| What you have | What changes |
|---|---|
| Gas dryer | d80 may indicate a lack of gas supplied to the unit (LG US) — check the supply valve and line as on the gAS page, in parallel with the vent checks. |
| Electric dryer | The gas-supply interpretation does not apply; investigate the exhaust system first, then seek LG service if the warning persists despite a verified clear vent. |
| Flow Sense bars instead of a number | Two or four bars lit mean the exhaust system is severely restricted (LG US) — run the same checks. |
One-page checklist — d80
- Code read as d80 (Flow Sense estimate: approximately 80% restricted)
- Gas dryer? Heating checked — if not heating, gas path checked too
- Lint filter cleaned (warm water + soft brush, dried fully)
- Hose behind the dryer checked: not crushed, kinked, coiled or holed
- Outside outlet checked: flappers fully open on Air Dry, lint cleared
- Code persists → duct cleaner booked; duct length + elbow count noted
- Vent verified clear but d80 remains → contact LG service.
Official LG references
Frequently asked questions
Is d80 a breakdown?
Usually not an internal dryer malfunction. LG primarily directs users to inspect the exhaust system; if the duct is clear and the warning persists, contact LG because an internal problem is also possible.
My gas dryer shows d80 and won't heat. Vent or gas?
LG's US list gives gas dryers a second reading of d80: a lack of gas supplied to the unit. Check the gas supply valve is ON and the line is not kinked. See the separate FixSignal gAS guide for the gas-supply checks. Run the vent checks on this page too — LG documents both causes for the same display.
How often should the vent be cleaned?
LG's UK list frames d80/d90/d95 as typically a signal to have the yearly vent cleaning completed by a professional vent cleaner. The warning may indicate that vent cleaning is needed, even if the last cleaning was less than a year ago.