Bosch dryer lint blockage: clean the filter and check airflow safely

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   Turn the program selector or dryer control off, allow the drum and door area to cool, then remove the lint filter and clear visible lint from the filter and the accessible filter opening.

   Expected result: Lint or compacted fluff is present on the screen or around the opening; the filter is clear but a warning or poor airflow remains.

   Next step: Clean the filter as the exact model instructions specify and continue only with the applicable airflow branch. Do not run the dryer without the filter installed.

   Why this matters

   Why: A dirty filter can impair operation and increase drying time; a clear screen does not rule out lint in the accessible opening, condenser, or model-specific airflow path.

2. Check 2

   If the filter is severely clogged or has detergent or fabric-softener residue, rinse or gently wash it only as the applicable Bosch instructions allow, then let it dry completely before reinstalling it.

   Expected result: Water no longer beads on a residue-coated mesh after cleaning, and the fully dry filter can be reinserted without damage; or the mesh is damaged, warped, or still blocked.

   Next step: Reinstall only a fully dry, undamaged filter. If it remains damaged or the warning returns, stop and use Bosch model-specific service guidance rather than modifying the filter.

   Why this matters

   Why: Residue can hold moisture and reduce effective airflow even when loose lint has been removed. A damaged or persistently blocked filter is not restored by forcing it into place.

3. Check 3

   For a Bosch dryer that has an exhaust duct and outside vent, inspect the outside outlet and visible duct for lint, obstruction, sharp bends, or crushing; disconnect power before moving the dryer or cleaning the duct.

   Expected result: The outside hood is blocked or the visible duct is kinked/crushed, or the outlet is clear and airflow appears steady.

   Next step: Remove only visible external obstructions and arrange a qualified vent cleaning when the internal duct is restricted or inaccessible. If the dryer is ventless, follow its manual instead of applying this branch.

   Why this matters

   Why: Bosch identifies a blocked or restricted vent as an airflow problem that can contribute to incomplete drying; a clear outlet does not prove the hidden duct is clear.

4. Check 4

   Record the complete model number and any display or indicator message before resetting anything; compare the message with the Bosch manual or official model support page.

   Expected result: The display matches a Bosch lint-filter warning such as E01/E02 on a supported model, an airflow/overheating message such as E12 on a supported model, or a different/unlisted message.

   Next step: Follow only the exact model's documented cleaning and service instructions. If the code is unlisted, returns after cleaning, or is associated with overheating, stop using the dryer and request Bosch or qualified service.

   Why this matters

   Why: Bosch publishes model-family-specific meanings: E01/E02 are listed as blocked lint-filter indications, while E12 guidance addresses overheating from restricted airflow. A different code cannot be mapped from this page.

5. Check 5

   Stop the dryer immediately if there is a burning smell, smoke, unusually high heat, repeated shutdown, a damaged filter, or a lint warning that persists after the documented cleaning.

   Expected result: The hazard or repeated symptom disappears only after external cleaning, or it remains/returns when the dryer is otherwise used normally.

   Next step: Leave the dryer off, disconnect power only if it is safe, and arrange Bosch or qualified appliance/vent service. Do not bypass a thermal device, open electrical covers, or keep running test loads.

   Why this matters

   Why: Persistent restriction or overheating may involve an inaccessible duct, condenser, heater circuit, or another fault that cannot be confirmed from lint appearance alone.