Direct answer
Suction that fades can indicate a filter loading with fine dust, an air-path flap closing, a soft blockage moving into place or thermal protection.
What this covers
- Vacuums · airflow
- The exact symptom in the title before component-level repair
- Consumer-accessible controls, connections and maintenance areas
What it does not cover
- ×Smoke, burning odor, swelling, liquid on powered parts or damaged wiring
- ×Opening sealed panels, bypassing interlocks or live-electrical testing
- ×Account ownership, billing or warranty disputes
Observe before changing anything
ReversibleStart with an empty bin and note whether motor pitch changes before suction drops.
Isolate the failing boundary
ReversibleDisconnect power and inspect every section of hose, wand, cyclone, filter and floor head separately.
Apply the narrow correction
ReversibleRemove the restriction and install clean, completely dry approved filters.
Verify the result and stop at the boundary
ReversibleStop for hot plastic, burning odor or repeated thermal shutdown.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Exact questions
Common follow-ups
What should I check first for “Vacuum loses suction after a few minutes”?+
Start with an empty bin and note whether motor pitch changes before suction drops.
How do I know whether the problem is external or inside the device?+
Disconnect power and inspect every section of hose, wand, cyclone, filter and floor head separately.
When should I stop and request repair?+
Stop for hot plastic, burning odor or repeated thermal shutdown.
Answer for the exact device and software version shown above.