HVAC Maintenance Checklist (12 Tasks)
Your HVAC system is the single most expensive mechanical system in your home, and it works harder than almost anything else — cooling in summer, heating in winter, running around the clock. A neglected system can fail in the middle of a heat wave or cold snap, and repairs can run into the thousands. This 12-task checklist covers everything from basic filter maintenance to professional inspections, helping you extend the life of your equipment and keep your energy bills in check.
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Get Started FreeFrequently Asked Questions
How often should I service my HVAC system?
Service your AC in spring before cooling season and your furnace or heat pump in fall before heating season — once per year for each function. If you have a heat pump that handles both heating and cooling, service it twice a year. Annual tune-ups cost $80–$150 per visit and are far cheaper than emergency repairs.
How long does an HVAC system last?
Central air conditioners typically last 15–20 years; furnaces 20–30 years; heat pumps 15–20 years. Systems that receive regular maintenance reach the high end of these ranges. Systems that are neglected, oversized, or undersized for the home tend to fail earlier. Check the manufacture date on the nameplate — it is usually encoded in the serial number.
What HVAC maintenance can I do myself?
DIY tasks include replacing air filters, cleaning the outdoor condenser coil, clearing the condensate drain, checking thermostat calibration, and inspecting visible ductwork for obvious leaks. Leave refrigerant work, heat exchanger inspection, electrical connections, and any gas-related work to licensed professionals.
How do I know if my HVAC system needs refrigerant?
Signs of low refrigerant include: AC that blows warm air after running for a while, ice forming on the refrigerant lines near the indoor unit, unusually long run times to reach setpoint, and higher than normal electricity bills. Low refrigerant always indicates a leak — adding refrigerant without finding and fixing the leak is a temporary fix.