Direct answer
A filter alert normally requests airflow maintenance, not refrigerant service. Clean and fully dry the customer-serviceable filter, then reset only the reminder.
What this covers
- Residential hybrid water heaters with removable air filters
- The exact condition described in the title
- Customer-accessible checks before internal repair or reset
What it does not cover
- ×A different brand, model family or similar-looking code
- ×Internal live-electrical, gas, refrigerant or sealed-system testing
- ×A guarantee that a named component has failed without isolation
Capture the exact state
ReversibleInspect alert, filter, clearance and changes in recovery or fan noise.
Separate the likely fault domains
ReversibleCompare blockage with room temperature and required clearance.
Correct only the proven, accessible condition
ReversibleClean by the approved method, dry fully, reinstall correctly and clear the reminder.
Verify once before going farther
ReversibleConfirm normal fan operation and no alert through a heating cycle.
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 record first for “Heat-pump water heater shows a filter alert”?+
Inspect alert, filter, clearance and changes in recovery or fan noise.
Does the symptom or code prove a part has failed?+
No. Compare blockage with room temperature and required clearance.
When should I stop troubleshooting?+
Stop for damaged housing, electrical odor, repeated shutdown or refrigerant damage.
Answer for the exact device and software version shown above.