How Often Should You Service Your AC?

Published April 28, 2026 - Cavinder Plumbing, Heating and Cooling - Granger, IN

Quick answer: Service your central air conditioner once a year, ideally in spring before cooling season starts, so problems get caught before the first heat wave. If you have a heat pump, service it twice a year - once in spring and once in fall - because it runs year-round for both cooling and heating. Annual service keeps the system efficient, satisfies most manufacturer warranty requirements, and catches small problems before they become breakdowns on the hottest day of the Michiana summer. Below is what a tune-up actually includes and why the timing matters.

To get on the schedule before the rush, call (574) 633-4557. Cavinder services air conditioners and heat pumps in Granger, South Bend, Mishawaka, Elkhart, and across Michiana.

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The Short Answer: Once a Year for AC, Twice for Heat Pumps

A standard central air conditioner needs professional service once a year. The best time is spring, before you rely on it through a Northern Indiana summer.

A heat pump is different. Because it provides both cooling in summer and heating in the milder parts of the heating season, it runs far more hours per year than an AC-only system. That extra runtime means a heat pump should be serviced twice a year - once in spring to prep for cooling and once in fall to prep for heating. Think of it as the same logic as servicing a furnace and an AC separately, just in one piece of equipment.

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What a Tune-Up Includes

A real AC tune-up is more than a quick look. A thorough visit generally covers:

• Cleaning the outdoor condenser coil - a season of dust, grass clippings, and cottonwood reduces how well the unit sheds heat
• Checking refrigerant charge - a system low on refrigerant runs longer, cools poorly, and can freeze up
• Inspecting and testing the electrical components - capacitors, the contactor, and connections, which are common failure points in summer heat
• Checking the evaporator coil and condensate drain - a clogged drain backs up water and can trip a safety switch
• Testing system performance - temperature split, airflow, and how the system cycles
• Replacing or checking the air filter and confirming the thermostat reads and signals correctly
• Lubricating moving parts and tightening connections as needed

The point is to find the weak link - a tired capacitor, a slightly low charge, a dirty coil - before it strands you without cooling in July.

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Why Annual Service Matters

Skipping maintenance doesn't save money; it just defers and usually multiplies the cost. Three reasons annual service pays off:

• Efficiency. A dirty coil, low charge, or clogged filter makes the system work harder for the same cooling, which shows up on your NIPSCO or AEP Indiana Michigan Power bill. Cleaning and tuning restores the efficiency you paid for.
• Warranty requirements. Most manufacturers require documented annual maintenance to keep the parts warranty valid. Skip it, and a denied warranty claim can turn a covered repair into an out-of-pocket one. Keep your service records.
• Catching small problems early. A weak capacitor or a refrigerant leak found in April is a planned, inexpensive fix. The same part failing during a heat wave is an emergency call, often with a wait. Maintenance turns surprises into scheduled work.

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Seasonal Timing for Michiana

Timing is half the value of a tune-up. For Northern Indiana and Southwest Michigan:

• Spring (roughly April into May) is the sweet spot for AC service. The weather is mild, schedules are open before the summer rush, and anything found can be fixed before you actually need cooling.
• Fall is the second visit for heat pumps, prepping the system for the heating season after a summer of cooling.
• Avoid waiting for the first heat wave. The busiest, hardest-to-book stretch is the first stretch of 90-degree days, exactly when a neglected system is most likely to fail. Booking in spring gets you ahead of that.

If you've never had your system serviced or it's been a couple of years, the best time to start is now, whatever the season - see our spring AC tune-up guide for why April is the ideal window.

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A Maintenance Plan Makes It Automatic

The hardest part of annual service is remembering to book it before the season hits. A maintenance plan solves that - the Cavinder Shield maintenance plans schedule your seasonal visits so the AC (and the heat pump's second visit) gets serviced on time without you having to track it.

A plan also keeps a documented service history, which is exactly what manufacturers want to see on a warranty claim, and it typically bundles the seasonal tune-ups so the cost is predictable. See our maintenance agreements for what's included, and our air conditioner repair page if something's already not cooling right.

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Frequently Asked Questions

How often should a central air conditioner be serviced?

Once a year, ideally in spring before cooling season. Annual service keeps the system efficient, satisfies most manufacturer warranty requirements, and catches small problems before they cause a breakdown during a Michiana heat wave. Heat pumps are the exception - they need service twice a year because they run for both cooling and heating.

Why do heat pumps need service twice a year?

A heat pump provides both cooling and heating, so it runs far more hours per year than an AC-only system. That extra runtime means more wear, so it gets a spring visit to prep for cooling and a fall visit to prep for heating. It is the same idea as servicing a separate furnace and AC, combined into one system.

What's the best time of year to service my AC in Indiana?

Spring, roughly April into May. The weather is mild, technicians are available before the summer rush, and anything found can be repaired before you rely on cooling. Waiting until the first 90-degree stretch means competing for appointments at exactly the time neglected systems tend to fail.

Does AC maintenance really affect my warranty?

Yes. Most air conditioner and heat pump manufacturers require documented annual maintenance to keep the parts warranty valid. If a major component fails and you cannot show it was maintained, a claim can be denied, turning a covered repair into an out-of-pocket expense. Keep your service records, or let a maintenance plan keep them for you.

What happens if I never service my air conditioner?

It will still run for a while, but efficiency drops as the coil gets dirty and the charge drifts, so your cooling bills climb. Small problems go unnoticed until they cause a breakdown, often during peak heat when service is hardest to book. And you may void the manufacturer warranty. Skipping maintenance does not save money; it defers and usually increases the cost.

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Schedule Your AC Tune-Up

Call (574) 633-4557 or book online. Licensed in Indiana (CO19900013 HVAC / PC19700254 plumbing). We service air conditioners and heat pumps in Granger, South Bend, Mishawaka, Elkhart, and across St. Joseph and Elkhart County. Ask about the Cavinder Shield maintenance plans. 24/7 emergency service available.