Central Air Conditioner

A central air conditioner is a whole-home cooling system that uses ductwork to distribute conditioned air throughout your living spaces, keeping every room comfortable during warm months. From sizing and installation to seasonal maintenance and repairs, there's a lot to consider when managing this essential system. Angi helps you find the right pros and resources to keep your home cool and comfortable year-round.

Related to Central Air Conditioner Service

Central Air Conditioner Service Articles and Advice
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Should You Replace the AC Coil or the Entire HVAC System?
An AC coil is an expensive part to replace and it won’t always be the right investment. Learn whether to replace a coil or the entire system.
Barbara Bellesi Zito  •  Jul 9, 2026
Adding Central Air to Your House: Can You Install AC in Your Home?
Adding central air to a house can add comfort and increase your home’s value. Our guide explains what you need to know about installing AC.
Taylor Freitas  •  Jul 9, 2026
What Are the Best Options for Installing Central Air in a House Without Ducts?
What should you do if you want central AC but don’t have ductwork? Here are your best options for installing central air in a house without ducts.
Paige Bennett  •  Jul 9, 2026
6 Signs of a Leaking Evaporator Coil in Your Home’s AC
Leaking AC coils can compromise your entire home cooling system. Look for these six signs of a leaking evaporator coil, and schedule a repair ASAP.
Elisa Greenberg  •  Jul 9, 2026
Central Air vs. Forced Air: What’s the Difference?
You'll need to consider several factors when deciding central air vs. forced air. Our guide will discuss the differences between central and forced air.
Paige Bennett  •  Jul 9, 2026
5 Signs of a Bad AC Condenser in Your Home
How do you know when your home’s AC is broken? Look for these five signs of a bad AC condenser.
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Common Central Air Conditioner Service Questions

If your home has an existing forced-air heat system, you can add a central air conditioner to it. An HVAC technician can retrofit your forced-air heating system by installing an evaporator coil onto the furnace plenum, the box next to the furnace that draws in air. Once installed, the air conditioning coils use the furnace’s blower to circulate the air.

If your central AC is not blowing cold air, you should try resetting the system. Many systems have a reset button. Make sure your thermostat is off, then turn off the circuit breaker that powers your AC. Hold the reset button for three to five seconds, then turn the circuit back on. Set your thermostat to cool and choose a temperature cooler than the room. Your system should turn on quickly.

The time it takes to install or replace a central AC unit depends heavily on whether new ductwork is needed. If you are replacing an existing unit and the ductwork is in good condition, the installation can often be completed in about one day. However, if you need to install a new system where no ductwork exists, or if the existing ductwork needs extensive repairs or replacement, the project will take longer. Installing new ductwork in an average single-family home typically takes at least two days, and can take up to five days or more for larger homes or those with complex layouts and hard-to-reach areas. The timeline can also be extended if significant electrical or plumbing updates are required. As an alternative, ductless mini-split systems and window AC units do not require ductwork and can usually be installed in two to six hours.

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There are many ways to keep your house cool without central air. In fact, ductless mini-split AC systems are a solid alternative to central AC for situations when you can’t install ducts in your home. If you’re looking for a more budget-friendly cooling solution, consider using window AC units or portable air conditioners.