HVAC maintenance, limited to what the evidence supports
Two pre-season tune-ups a year, disciplined filter changes, and clean coils. That is what ENERGY STAR and the industry standard actually call for, and it is what we arrange.
HVAC maintenance has an evidence problem: the useful guidance is buried under sales programs. So here is the actual standard of care. ENERGY STAR recommends a yearly tune-up of your heating and cooling system, with the cooling checkup scheduled in spring and the heating checkup in fall, plus inspecting your air filter monthly and changing it at least every 3 months. On the professional side, ANSI/ACCA 4 QM-2019, reaffirmed in 2024, is the national standard defining the minimum inspection tasks for residential HVAC maintenance. That is the whole recipe. Anything a contractor adds on top should come with a reason.
Why the boring tasks pay
The economics rest on one fact: heating and cooling account for roughly 43 percent of a typical home's utility bill, according to the US Department of Energy, which makes HVAC the biggest energy expense in most homes. Against that baseline, the documented savings are meaningful. The Department of Energy states that replacing a dirty, clogged filter with a clean one can lower an air conditioner's energy consumption by 5 to 15 percent. ENERGY STAR's maintenance checklist notes that airflow problems, the kind a tune-up finds and corrects, can reduce system efficiency by up to 15 percent. And a pre-season visit catches weak capacitors, low refrigerant charge, and dirty coils before the first extreme week of the season turns them into breakdowns, when demand for technicians peaks and schedules are tightest.
A proper tune-up in the metros we serve, Phoenix, Dallas, San Antonio, and Charlotte, is scheduled by season: cooling checks in spring before triple-digit heat arrives, heating checks in fall before the first cold front. One heat pump doing both jobs still deserves both visits, because the failure modes of each season are different.
What a real maintenance visit includes
These are the tasks with evidence or an industry standard behind them. If a maintenance plan sells you more than this, ask why.
Spring cooling tune-up
Refrigerant charge, electrical connections, coil condition, and blower adjustment, checked before the first heat wave, per the ENERGY STAR maintenance checklist.
Fall heating tune-up
Ignition, heat exchanger inspection, defrost operation on heat pumps, and safety controls, checked before the first cold snap.
Filter service
Inspect monthly, change at least every 3 months, per ENERGY STAR. The single highest-value maintenance task a homeowner can do.
Coil cleaning
Dirty condenser and evaporator coils force the system to work harder for less cooling. Cleaning restores heat transfer where it matters.
Condensate drain service
A clogged drain line is a leading cause of AC water damage and summer shutdowns. Clearing it is quick and cheap compared to drywall repair.
Electrical and airflow checks
Loose connections and blower problems degrade quietly. ENERGY STAR notes airflow problems can reduce system efficiency by up to 15 percent.
Book the tune-up before the season does it for you
A licensed local technician runs the pre-season checklist and quotes any repair separately, for your approval first.
Frequently asked questions
How often should HVAC equipment be professionally serviced?
ENERGY STAR recommends a yearly tune-up of your heating and cooling system, with the cooling checkup scheduled in spring and the heating checkup in fall. For homes with a single heat pump doing both jobs, that works out to pre-season checks twice a year, which also matches the industry-standard maintenance schedule.
Is there an actual industry standard for HVAC maintenance?
Yes. ANSI/ACCA 4 QM-2019, reaffirmed in 2024, is the national standard for maintenance of residential HVAC systems. It defines the minimum inspection tasks a proper maintenance visit should include, so you can ask a contractor whether their tune-up follows it.
How often should I change my air filter?
ENERGY STAR advises inspecting the filter monthly and changing it at least every 3 months. In dusty climates or homes with pets, monthly changes during heavy-use season are reasonable. The US Department of Energy notes that replacing a dirty, clogged filter with a clean one can lower AC energy consumption by 5 to 15 percent.
Does maintenance actually save money or is it an upsell?
The evidence supports specific tasks rather than maintenance in general: clean filters cut AC energy use by 5 to 15 percent per the Department of Energy, and ENERGY STAR reports airflow problems can reduce efficiency by up to 15 percent. With heating and cooling making up roughly 43 percent of a typical utility bill per DOE, small percentage gains are real dollars. What is not supported: monthly professional visits or blanket part replacements on healthy systems.
Request a maintenance visit
Tell us which system needs a tune-up and a local technician will call you back to schedule.