Kenmore Dryer Error Code d80 — 80% Lint/Vent Blockage Detected
What this means
The d80 error code on Kenmore dryers means the airflow sensor has detected approximately 80% blockage in the exhaust vent system. The dryer is still operating but at significantly reduced efficiency. Drying times will be much longer and the dryer may overheat. This is a warning that should be addressed before the blockage reaches a dangerous level.
Alternate codes: D80
Step-by-step fix
3 stepsClean the lint trap and its housing
Remove and clean the lint filter. Then use a long, narrow brush or vacuum crevice tool to clean deep inside the lint trap housing slot where lint accumulates below the filter.
A specialized lint trap brush (long and narrow) can pull out surprising amounts of lint from inside the housing.
Disconnect and clean the exhaust vent
Unplug the dryer and disconnect the vent duct from the back. Use a vent brush kit to thoroughly clean the duct from the dryer end. Push the brush through the entire length. Vacuum out the vent port on the dryer.
Consider having the vent professionally cleaned at least once a year, especially if your vent run is longer than 15 feet.
Check for duct issues
Inspect the duct for crushed sections, sags, or excessive length. Replace any damaged sections. Ensure all connections are secure with metal tape (not screws, which catch lint internally).
Never use sheet metal screws inside vent ducts — the protruding tips catch lint and create blockages.
When to call a professional
If the vent run is very long, has many bends, or goes through the roof, a professional cleaning service with commercial equipment is the safest and most thorough option.
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.
Learn more about our sourcesParts you may need
Vent Cleaning Brush Kit (20ft)
Part #Universal 20ft dryer vent kit · $20–$35
Recommended for thorough vent cleaning
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