E03
Bosch
Exhaust Airflow / Blocked Vent Fault
Bosch dryer runs briefly then stops with E03 on the display.
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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
Severely restricted exhaust duct, Crushed or kinked vent hose, Blocked lint passages inside dryer, Faulty airflow sensor (if equipped)
How to Fix / Troubleshooting
Safety first: Unplug the dryer before moving or disconnecting vents.
- Inspect vent hose: Pull the dryer away from the wall. Check that the flexible duct is not crushed, kinked, or excessively long. Replace with a rigid or semi-rigid metal duct if possible.
- Clean vent system: Disconnect the duct from both the dryer and wall. Use a vent brush or vacuum to remove lint from the entire run to the outside. Ensure the exterior vent flap opens freely.
- Clean internal lint passages: Remove the rear panel and carefully vacuum lint from around the blower housing and exhaust channel. Do not disturb wiring or sensors.
- Check airflow sensor (if present): Some Bosch models use a pressure or airflow sensor. Inspect the small rubber hose and connections for blockages or cracks. Replace the sensor if readings are erratic.
After reassembly, run a timed cycle with no load to confirm normal operation and that E03 does not reappear.
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Repair Difficulty
Medium
3/5
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