Short answer
Replace an AC when repairs are getting expensive on an aging system, when the compressor or indoor coil fails on an older unit, or when the system can't keep the house comfortable. The price depends on system size, equipment type, where it's installed, ductwork condition and electrical work. Get a written quote that lists model numbers and everything included.
If your AC just died, the first question isn't which system to buy. It's whether the one you have is worth fixing. Ask that first, and expect a straight answer. When replacement is the right call, here's what you should know.
Signs it's time to replace
- The compressor or the indoor coil has failed on a system that's well into its second decade.
- You're on the second or third refrigerant leak.
- Repairs are coming every season, and the bills are adding up.
- The system can't keep up on hot afternoons even when it's working correctly.
- The house is clammy, some rooms are always hot, or the power bill keeps climbing.
Age alone isn't a reason. A well-kept older system with no major failures can keep going. A young system with a bad install may never work right. See AC repair for the repair side of that decision.
What drives the price
Size (tonnage)
Bigger houses need bigger systems, and bigger costs more. But bigger than the house needs is worse, not better: it cools fast, shuts off before it removes humidity, and leaves the house cold and damp.
AC and furnace, or heat pump
Many Upstate homes run a heat pump, which heats and cools with the same outdoor unit. Others pair an AC with a gas furnace. What you have now, and what fuel you have at the house, shapes what makes sense. See heat pumps.
Where the equipment lives
An air handler in an open closet is a different job from one wedged into a crawlspace or a tight attic. Access affects labor, and labor is a real part of the price.
Ductwork condition
A new system pushing air through crushed, disconnected or leaking ducts won't perform. If the ducts need work, that belongs in the quote. See ductwork.
Electrical, line set, and the old equipment
The electrical circuit and disconnect, the copper refrigerant line between the units, the drain line and pan, the thermostat, and hauling off the old equipment can all be part of the job. A good quote says which ones are.
What we check before quoting
- The house: size, layout, insulation, windows, and which rooms are uncomfortable now.
- The existing system: age, type, size, and why it's being replaced.
- The ductwork: condition, sizing, leaks, and how well each room gets air.
- Access: attic, crawlspace or closet, and what it takes to get equipment in and out.
- Electrical and drainage: what can be reused and what needs to change.
- Your priorities: budget, how long you plan to stay, and comfort problems you want solved.
What it costs
Ask what the service call costs when you call. For what drives the price of a repair or a new system, see what HVAC work costs.
How to compare quotes
Whoever you hire, ask for these in writing:
- The model numbers of every piece of equipment, indoor and outdoor.
- How the system was sized, and whether that came from the house or from the old unit's label.
- Everything included: line set, pad, electrical, drain, thermostat, ductwork, disposal, permits.
- The warranty on equipment, and separately on labor.
Two quotes that look far apart are often quoting different work. Lining them up item by item is the fastest way to see why.
Local detail
Boiling Springs grew from 4,544 residents in 2000 to 10,405 at the 2020 census, and most of that growth was new subdivisions. The original systems in those houses are now fifteen to twenty-five years old, the age when replacement starts coming up. Many sit in hot attics or crawlspaces, and access matters for both the price and how easily the new system can be serviced later.
Common questions
How much does a new AC system cost in the Spartanburg and Greenville area?
It depends on the size of the system, whether it is an AC with a furnace or a heat pump, where the equipment sits (attic, crawlspace or closet), the condition of the ductwork, and any electrical work needed. Ask for a written quote that lists the equipment model numbers and everything included.
What size AC does my house need?
The right size comes from the house itself: square footage, insulation, windows, which way it faces, and ductwork. Copying the tonnage of the old unit repeats any mistake the last installer made. An oversized system short-cycles and leaves the house clammy, which is a common Upstate complaint.
Should I replace my AC and furnace at the same time?
Often, yes, when both are older, because the indoor and outdoor equipment are designed to work as a matched system. If the furnace is young and in good condition, replacing only the outdoor unit and coil can make sense. It is a case-by-case decision.
Do I need to replace my ductwork with a new system?
Not always. Ductwork in good condition can be reused. Crushed, disconnected, leaky or undersized ducts should be fixed, because a new system cannot deliver air through ducts that lose it.