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Signs a system may need deeper cleaning
A dirty filter is not the only source of poor airflow or odor. Buildup can develop on the coil, blower, louvers, drain pan or condensate path, depending on equipment and operating conditions.
- Persistent musty or stale odor while the unit runs
- Visible residue inside the indoor unit
- Reduced airflow after filters have been serviced
- Water dripping or recurring condensate blockage
- Heavy dust exposure, pets or recent construction