Can a dirty vent cause my dryer to shut off mid-cycle?
Yes — most dryers made after 2010 have thermal cut-off switches or airflow sensors that shut the unit down when internal temperature exceeds a safe limit, and a clogged vent is the #1 cause. It's a safety feature working correctly, but it's also a signal the vent needs immediate attention.
Modern dryers include one or more safety cut-offs: a thermal fuse (one-time, must be replaced after it trips), a thermistor (reversible, controls the cycle), and in some newer models a direct airflow sensor. When any of these detects overtemperature or restricted airflow, the cycle stops.
When this happens repeatedly — even after you restart and try again — the vent is almost always the culprit. The sensors aren't broken; they're protecting the machine (and your house) from the actual problem. Running the cycle again and again stresses the heating element and will eventually burn it out.
What to do: stop using the dryer, book an inspection, and have the vent cleared before you run another load. The $49.99 inspection will document whether it's actually a vent issue or a failed sensor (less common). If the vent is clear and the unit keeps tripping, the next step is a service call on the dryer itself.
Manufacturer resources
Official support pages for brands commonly referenced in this answer.
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