HVAC Maintenance Checklist & Filter Guide
Routine checks can help heating and cooling equipment operate as intended. Use the equipment manual for the correct filter, replacement schedule, and service requirements.
How Often Should You Replace Filters?
Follow the system and filter manufacturers' instructions. Many residential filters are replaced every 60 to 90 days, but pets, smoke, construction dust, heavy use, and filter type may require more frequent checks.
- Record the exact filter dimensions and airflow direction.
- Inspect the filter regularly and replace it on the manufacturer's schedule or when visibly dirty.
- Use only a filter rating that the HVAC system supports; an overly restrictive filter can reduce airflow.
Seasonal HVAC Checklists
Spring Checklist (AC Focus)
Before the heat of summer hits, prep your air conditioner:
- Clear leaves, brush, and grass clippings from the outdoor condenser unit.
- Check the condensate drain for signs of blockage. Follow the manual or contact a technician before cleaning it.
- Confirm vents are open and not blocked by furniture.
Fall Checklist (Furnace Focus)
Before freezing temperatures arrive, inspect your heating system:
- Schedule service if you notice fuel odors, soot, ignition trouble, or repeated shutdowns.
- Listen for unusual squealing, rattling, or thumping noises from the blower.
- Test carbon monoxide alarms and replace them according to the alarm manufacturer's instructions.
The replacement filter must fit correctly and be compatible with your HVAC system.
Keep HVAC Service Records
Save filter sizes, manual links, service dates, and technician notes. Set reminders that match the equipment manufacturer's schedule.