F33
JennAir
Exhaust Airflow Sensor or Pressure Switch Fault
Dryer displays F33 and may not start or may shut down unexpectedly.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed airflow pressure switch (if equipped), Disconnected or cracked pressure hose, Blocked pressure port on blower housing, Loose wiring to airflow sensor
How to Fix / Troubleshooting
Safety first: Unplug the dryer before accessing internal components.
- Locate the airflow sensor/pressure switch: On models equipped, it is usually mounted near the blower housing with a small rubber or plastic tube attached.
- Inspect the hose: Check the pressure hose for cracks, kinks, or disconnections. Replace if brittle or damaged.
- Clean the pressure port: Remove the hose from the blower housing and clear any lint from the port using a small brush or compressed air.
- Check wiring: Ensure the electrical connector to the sensor or switch is secure and free of corrosion.
- Replace the sensor/switch if faulty: If the code persists after cleaning and inspection, replace the airflow sensor or pressure switch, reassemble the dryer, and test operation.
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Repair Difficulty
Hard
4/5
Required Part
Airflow Pressure Switch
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