How Often Should I Service My HVAC?

TL;DR: Twice a year — once for cooling before summer, once for heating before winter — plus regular filter changes. Skipping a season is how small issues become expensive ones.

_Last reviewed: July 2026 · 4 min read_

If you're wondering how often your HVAC really needs service, the honest answer is: twice a year — once for cooling in spring, once for heating in fall — plus filter changes every 1 to 3 months. Skipping a season is exactly how a $180 tune-up becomes a $2,000 breakdown.

Okoniq Property Hub tracks each visit and warranty expiration so you're never guessing what's due. Here's the schedule and why it matters.

What does "twice a year" cover?

Spring cooling visit (March-May): the technician cleans the outdoor condenser coils, checks refrigerant charge, tests the capacitor and contactor, and confirms the system will hold up when temperatures spike. Missed spring service is the single most common cause of July "no cool" emergency calls.

Fall heating visit (September-November): the technician inspects the burner or heat exchanger, tests the ignition, checks flue draft (gas systems), inspects electric elements (heat pumps and electric furnaces), and confirms carbon monoxide levels are safe. Missed fall service is the single most common cause of January "no heat" emergencies.

A single "annual" visit is not enough for combined heat/AC systems in most climates — either the cooling side or the heating side goes uninspected.

How often should I change the filter?

Depends on the filter type and household:

• 1" fiberglass filters: every 30 days
• 1" pleated filters: every 60-90 days
• 4-5" media filters: every 6-12 months
• HEPA filters: per manufacturer schedule

Factors that shorten the interval: pets, allergies, wildfire smoke season, recent construction/renovation dust, tobacco. Factors that extend it: unoccupied vacation homes, higher-MERV filters used lightly.

A clogged filter is the #1 cause of frozen coils, weak airflow, and premature blower motor failure — and it costs $8.

Should I service it even if nothing seems wrong?

Yes. HVAC systems fail because small issues compound over months. A capacitor drifting toward end-of-life doesn't fail dramatically — it fails on the hottest day of the year when demand is highest. Regular service catches the drift before it strands you.

Also: manufacturer warranties often require documented annual maintenance to remain valid. Refrigerant leaks, compressor failures, and heat exchanger issues — the exact expensive ones — are the parts most likely to have warranty coverage denied for "insufficient maintenance." A $180 annual visit protects a $3,000+ potential warranty claim.

What about DIY?

You can and should do the easy bits yourself:

• Filter changes
• Keep 2 feet of clearance around the outdoor condenser (trim shrubs, clear leaves)
• Rinse the outdoor coils with a garden hose (turn power off first)
• Ensure the condensate drain isn't clogged (see AC condensate drain line care if you already have that post)

Leave the professional stuff (refrigerant, gas valves, electrical inside the air handler) to a licensed HVAC tech.

How long should my HVAC last?

• Central AC / heat pump: 12-15 years typical, 15-20 with excellent service
• Gas furnace: 15-20 years typical, up to 25 with excellent service
• Boiler: 15-30 years depending on type and water quality
• Mini-split: 10-18 years

Regular service adds 3-5 years to typical lifespan on the average system. That's a huge return on $360/year of service.

Never lose track of your HVAC service schedule

Twice-a-year service only works if it actually happens. Okoniq Property Hub sends reminders based on your last service date and stores each visit's invoice, tech notes, and warranty documents together. Related: fall home maintenance checklist tied to records and the Maintenance & Repairs hub. For general HVAC efficiency tips, the ENERGY STAR heating & cooling page is a solid free resource.

Frequently asked questions

Are annual maintenance contracts worth it?

Usually yes — priced right (~$150-$250/year for two visits), they beat pay-per-visit costs and often include filter changes and priority service. Read the fine print for what "covered" repairs actually mean.

What if I have a heat pump instead of separate systems?

Same schedule — treat spring and fall as cooling-mode and heating-mode tune-ups respectively. Heat pumps benefit especially from twice-a-year visits because they run year-round.

Should I service a system that's older than 15 years?

Yes — regular service is what pushes it further past average lifespan. But budget for replacement; running old systems to failure often means replacing during a heat wave or cold snap when prices and wait times spike.

Okoniq Property Hub helps homeowners keep HVAC records connected to warranty windows and vendor history. Get started free.

FAQ

How much does HVAC maintenance cost if I don't have a contract?

Expect $80–$150 per visit without a contract, so $160–$300/year for both spring and fall service. Annual contracts typically bundle both visits for $150–$250 total, saving $10–$50 and often including priority scheduling during peak breakdown season.

Can I skip the spring AC check if I serviced the furnace in fall?

No — fall service inspects only the heating components (burner, heat exchanger, ignition), while spring service addresses the cooling side (condenser coils, refrigerant, capacitor). Skipping spring means the AC runs uninspected for an entire cooling season, and that's when July emergency calls happen.

What happens if I miss a year of HVAC maintenance?

Small issues like a weakening capacitor or dirty coils compound into breakdowns during peak demand, and many manufacturer warranties require documented annual service to honor claims on expensive parts like compressors and heat exchangers. A single missed year can void coverage on a $3,000+ repair.

Do mini-splits need the same twice-a-year service schedule?

Yes — mini-splits run year-round for both heating and cooling, so they benefit even more from spring and fall tune-ups. Technicians clean indoor and outdoor coils, check refrigerant, and inspect the inverter compressor, which is costlier to replace than conventional systems.