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Quick answer
On the Bosch WTMC352BUC/06, a lint-filter warning together with an unresponsive panel should be treated first as a maintenance and safety indication, not as proof that a particular board, sensor or motor has failed. Turn the selector off, let the dryer cool, remove and clean the lint filter and the accessible filter opening, and reinstall the filter completely dry. Bosch documentation for its North American dryer family says the filter indicator can require a Start/Pause acknowledgement after cleaning, but the opened documentation is not identified for WTMC352BUC/06 and Bosch's current model lookup did not expose an exact manual for this older E-Nr. Do not keep trying button sequences from another Bosch model. If the warning and unresponsive controls return after the filter, airflow and door checks, disconnect the dryer and arrange Bosch or qualified appliance service.
Work through in order
Diagnostic checks
Use only checks that match the exact appliance or system and its official guide.
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Check 1
Record the exact panel state before changing anything: which lint-filter, Start/Pause or other indicators are lit or blinking, whether the display shows 00:00, and whether the selector or buttons respond.
Expected result: Only the filter reminder is present and controls respond, or multiple indicators are fixed/blinking and the panel is unresponsive as in the reported WTMC352BUC/06 symptom.
Next step: Take a photo or write down the pattern for service, then continue with the cool external maintenance check. Do not use a reset sequence copied from another model.
Why this matters
Why: A maintenance reminder with working controls is a different path from a persistent multi-light/unresponsive state; the light pattern alone does not identify an internal component.
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Check 2
Turn the program selector off, let the dryer cool, open the door, remove the lint filter and clear lint from both filter surfaces and the visible opening around it.
Expected result: Lint, dust or residue is present, or the filter and opening are already visibly clear.
Next step: For a severely clogged filter, rinse it gently under running water and let it dry completely. Reinsert it fully before any test; do not reach deep into the housing with a hard object.
Why this matters
Why: A loaded filter can trigger the maintenance indication and restrict drying airflow; a clear filter makes simple lint loading less likely but does not prove the warning circuit is defective.
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Check 3
With the filter removed and the appliance disconnected only as needed for cool cleaning, vacuum or wipe the accessible filter opening using only a soft instrument, staying within the opening's manufacturer-stated reach.
Expected result: Loose lint is removed from the accessible area, or the area is already clear but the warning remains unchanged.
Next step: Reinstall the completely dry filter and close the door. Do not remove panels, probe wiring or push tools farther into the housing.
Why this matters
Why: Lint in the opening can keep maintenance and airflow problems present; a clear accessible opening with the same unresponsive panel points beyond routine cleaning, without naming the failed part.
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Check 4
Check the door closure and the external exhaust path without disassembling the dryer: the door should close securely, and the vent outlet should not be visibly blocked or crushed.
Expected result: The door is not latched or the exhaust path is visibly restricted, or both are clear.
Next step: Correct only the visible obstruction and close the door normally. If the warning and no-response state persist with a clear path, stop troubleshooting and arrange service.
Why this matters
Why: A door that is not closed or restricted airflow can prevent a cycle or cause a maintenance warning, but these observations do not prove why a control panel is unresponsive.
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Check 5
After the filter is fully dry and seated, use only the control acknowledgement described in the exact WTMC352BUC/06 documentation if Bosch provides it; do not repeat power cycles or try sequences from a newer Bosch dryer.
Expected result: The indication clears and the controls respond, or the same lights and unresponsive state return immediately.
Next step: If the state remains or returns, switch off and disconnect the dryer and provide the model suffix, indicator pattern, filter/airflow checks and any recent event to Bosch or an authorized servicer.
Why this matters
Why: Clearing after the correct model-specific acknowledgement supports a maintenance reminder; immediate recurrence without an exact-model procedure leaves the cause unresolved.
Use your observations
Decision map
Find the observation that best matches what you see, then follow the next safe action.
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PATH 01Next step
What you see
The filter was visibly loaded, the controls respond, and the warning clears after the filter is cleaned, dried and correctly reinserted.
Do this next
Clean the filter before or after each load and monitor drying time and airflow. Use the exact model documentation if the light returns.
Why this path and its safety boundary
Why it matters: The indication behaved like a maintenance reminder; this does not establish an internal repair need.
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PATH 02Next step
What you see
The filter and accessible opening are clean and dry, but the lint-filter and Start/Pause indicators remain active while the panel ignores buttons or selector changes.
Do this next
Do not substitute another model's sequence. Disconnect the dryer and arrange Bosch or qualified service with the recorded light pattern.
Why this path and its safety boundary
Why it matters: The reported symptom is beyond a simple lint-removal check, and the exact reset semantics for WTMC352BUC/06 have not been verified from Bosch's public documentation.
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PATH 03Next step
What you see
The door will not latch or the external exhaust is visibly blocked, and the warning or no-start behavior changes after that accessible issue is corrected.
Do this next
Run only the normal model-supported cycle after the dryer is cool and the filter is dry. Stop if the warning returns or the dryer overheats.
Why this path and its safety boundary
Why it matters: A closure or airflow condition may have prevented normal operation, but it still does not prove a failed lint sensor or control board.
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PATH 04Next step
What you see
The warning is accompanied by burning odor, smoke, abnormal heat, damaged wiring, repeated breaker trips or a hot load that does not cool normally.
Do this next
Stop using the dryer, disconnect power if it is safe to do so, keep the area clear and arrange urgent qualified appliance service. Do not reopen the console or run another test load.
Why this path and its safety boundary
Why it matters: This is a fire, electrical or overheating safety concern rather than a reset problem.
Helpful context
Understand the symptom
What the warning does and does not prove
Bosch dryers use a filter reminder to prompt lint maintenance, and Bosch troubleshooting material also connects filter or condenser maintenance with a dryer that will not start or will not dry properly. A warning that remains lit after cleaning does not identify a failed control board, thermistor, motor or filter sensor by itself. The exact WTMC352BUC/06 manual was not available through Bosch's current model search, so an acknowledgement sequence from a newer or different Bosch E-Nr. cannot be transferred to this dryer.
Do the accessible maintenance once, with the dryer cool
Turn the selector off and wait for the drum and door area to cool. Pull out the lint filter, remove lint from both surfaces and the visible filter opening, and rinse a severely clogged filter only if it can be dried completely before reinstalling. Bosch's manual warns that the filter area is a fire hazard and limits cleaning inside that opening to a soft instrument or vacuum within the stated reach. Do not push a rigid object deep into the housing.
Treat a persistent warning as a service boundary
If the filter is clean, dry and seated but the panel still shows the warning and ignores the selector or buttons, record the exact indicator pattern and disconnect the dryer. Do not open the console, bridge a door switch, test live wiring or repeatedly run the dryer with a suspected airflow restriction. Bosch states that repairs and part replacement should be performed by authorized service providers in the opened manual.
Common questions
FAQ
Does the Bosch lint-filter light prove that the filter sensor or control board has failed?
No. It first calls for filter maintenance, and Bosch guidance also links filter or condenser maintenance with drying and no-start symptoms. A persistent light with an unresponsive panel needs model-specific service diagnosis.
Can I rinse the lint filter?
Bosch says a severely dirty or clogged filter may be rinsed under warm running water, but it must be dried thoroughly before it goes back into the dryer. Never run the dryer with a wet or missing filter.
Can I use a reset sequence from another Bosch dryer?
No. Bosch's opened manual describes a Start/Pause acknowledgement for its documented dryer family, but it is not identified for WTMC352BUC/06. Use the exact model documentation or service route rather than transferring a sequence across E-Nrs.
When should I stop trying to clear the warning?
Stop when the clean, dry filter and accessible opening do not change the warning, the controls remain unresponsive, or there is smoke, burning odor, abnormal heat or breaker activity. Disconnect the appliance when safe and arrange qualified service.
Read the exact guide
Official sources
- Dryer troubleshooting: Dryer is not drying clothes completelyBosch Home Appliances · Used for Bosch's general external checks of the lint filter, moisture sensor and vent outlet, and its direction to professional support when the issue persists. It is not treated as a model-specific WTMC352BUC/06 reset guide.
- Dryer Maintenance: Cleaning your dryer’s lint filterBosch Home Appliances · Official Bosch family-level maintenance guidance used for removing lint, optional gentle rinsing of a dirty filter, complete drying and reinsertion. It does not define the WTMC352BUC/06 warning-reset sequence or diagnose an internal fault.
- Bosch 300 Nexxt Dryer. Lint filter warning will not reset.Reddit r/appliancerepair · Exact Reddit post opened and used only to confirm the assigned model/symptom context and the poster's reported unsuccessful cleaning/unplugging attempts. It is not treated as official diagnosis, repair instruction or proof of outcome.
- Bosch Dryers Troubleshooting & Repair | Bosch - Owner Support – Error Codes, Parts, Cleaning & MaintenanceBosch Home Appliances · Used only for Bosch's official support/manual lookup and authorized repair boundary after routine maintenance does not resolve an unresponsive dryer. It does not establish the assigned model's warning semantics.
- Bosch Clothes Dryer Use and Care ManualBosch Home Appliances · Opened official Bosch PDF with North American dryer maintenance and troubleshooting content. The document's example E-Nr. and current features do not identify WTMC352BUC/06, so it is used only for family-level safety, filter maintenance and the existence of a Start/Pause acknowledgement in that documented family; it is not used to promise that sequence for the assigned older model.
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