Heat Pump vs Central Air Conditioner: What to Install When Your AC Dies

Quick answer

If your central AC has died, a heat pump is usually the better replacement. It cools exactly like an air conditioner — it’s the same kind of machine, with a valve that lets it run in reverse to heat — and typically costs only about $1,000–$2,500 more than a comparable new AC when you keep your existing furnace. In return, you get efficient heating for spring, fall and mild winter days. The savings are largest if you heat with propane, oil or electric resistance; with cheap natural gas they’re modest, but you also gain a backup heat source.

Heat pump vs central AC at a glance

	Central air conditioner	Heat pump
Cools your home	Yes	Yes, with the same efficiency ratings (SEER2)
Heats your home	No	Yes, efficiently (typically 2–3× as efficient as electric resistance)
Typical replacement cost (3 tons, existing furnace and ducts)	~$5,000–$7,500	~$6,000–$9,500
Works with your existing gas furnace	Yes	Yes — as a “dual-fuel” system
Lifespan	~15–20 years	~12–15 years (runs year-round)
Maintenance	Once a year, before summer	Ideally twice a year (before heating and cooling seasons)
Federal tax credit in 2026	None	None (25C ended December 31, 2025)
State and utility rebates	Rare	Common

How much more does a heat pump cost than an AC?

The answer depends on what else you’re replacing. Prices are typical 2026 installed costs for a 3-ton system using existing ductwork.

Scenario	New central AC	Heat pump	Difference
AC dies, gas furnace is fine (keep the furnace)	~$5,000–$7,500 (outdoor unit + indoor coil)	~$6,000–$9,500 as dual-fuel (outdoor unit + coil + compatible thermostat)	~$1,000–$2,500 more
AC and furnace both need replacing	~$9,000–$13,000 (new furnace + new AC)	~$8,000–$12,000 (heat pump + air handler)	About the same, sometimes less
AC dies, home heated by electric furnace or baseboards	~$5,000–$7,500	~$6,000–$9,500	~$1,000–$2,500 more, recovered quickly in heating savings
Variable-speed / high-efficiency tier	~$8,000–$11,000	~$9,500–$13,000	~$1,500–$2,500 more

What drives the gap: the heat pump’s outdoor unit has a reversing valve and defrost controls, and it needs a thermostat that can manage a heat pump plus backup heat. With a dual-fuel setup, the installer also sets the outdoor temperature at which the system switches to the furnace.

Rebates can close the gap. Many state and utility programs offer heat pump rebates but nothing for central AC. Since September 2026, the federal HEAR rebate covers only upgrades from electric equipment, and some states may allow it when a heat pump replaces an electric AC while the furnace stays. Check your state’s rules.

How much will a heat pump save on heating?

Cooling costs are about the same whichever you choose, since a heat pump and an AC with the same SEER2 rating cool equally efficiently. The difference is heating: the heat pump takes over some or all of your winter heating.

Assumptions: 2,000 sq ft home, moderate-to-cold climate, 2026 US-average prices (18¢/kWh electricity, $1.50/therm gas, $2.80/gal propane, $3.80/gal oil).

You heat with	Yearly heating savings with a heat pump	Payback on a ~$1,000–$2,500 premium
Electric furnace or baseboards	~$1,500–$1,750	Under 2 years
Propane furnace	~$500–$700	~2–4 years
Oil furnace or boiler	~$550–$700	~2–4 years
Natural gas furnace (dual-fuel)	~$90–$250	~5–25 years, depending on your rates

With natural gas, your local prices decide. Divide your electric rate (per kWh) by your gas price (per therm). Below roughly 0.09–0.11, the heat pump heats more cheaply than gas for much of the winter and savings grow; above that, the furnace stays cheaper and the thermostat should lean on it more. We explain the rule in our heat pump vs gas furnace comparison.

Time-of-use and heat pump electric rates can improve these numbers. Some utilities offer discounted winter rates to heat pump owners.

Cooling, lifespan, maintenance and comfort

Cooling performance: a tie

In cooling mode, a heat pump is an air conditioner: same compressor, same coils, same refrigerant cycle. A heat pump and an AC with the same SEER2 rating will cool your home equally well and cost the same to run in summer. Both now use newer, lower-impact refrigerants (R-454B or R-32) on new equipment.

Lifespan: AC lasts a bit longer

	Typical lifespan	Why
Central AC	~15–20 years	Runs only in the cooling season
Heat pump	~12–15 years	Runs most of the year, heating and cooling

In a dual-fuel setup, the heat pump runs fewer winter hours because the furnace handles the coldest days, which can help it last longer.

Maintenance

Both need clean filters and a clear outdoor unit. An AC gets one annual tune-up before summer; a heat pump benefits from a check before both the cooling and heating seasons, roughly $100–$200 per visit. In winter, you’ll also need to keep snow and ice clear of the outdoor unit.

Comfort

Variable-speed heat pumps run long, gentle cycles that keep temperatures even and remove humidity well in summer. In winter, heat pump air feels warm rather than hot (about 85–100°F at the vents vs 120–140°F from a gas furnace). In a dual-fuel system, you get heat pump comfort in mild weather and the furnace’s hotter air on the coldest days.

When a central AC still makes sense

Very cheap natural gas and pricey electricity (your electric-rate-to-gas-price ratio is well above 0.12) and you rarely need heat in spring and fall. The heat pump would mostly sit idle in heating mode.
Your budget is truly fixed at the lowest-cost option and no heat pump rebates are available.
Your furnace is brand new and you expect to sell the home soon. The extra heating savings won’t have time to pay back.
Your ducts and air handler can’t support it. Rarely, an older furnace blower or undersized ducts can’t deliver the airflow a heat pump needs without extra work.

Even in these cases, ask for a heat pump quote alongside the AC quote. The gap is often smaller than expected.

What to ask for in your quotes

Matching quotes for an AC and a heat pump of the same size and SEER2 tier, so you can see the true difference
A Manual J load calculation, not a size based on your old unit
For dual-fuel: confirmation your furnace is compatible, and the planned switchover (balance point) temperature
A thermostat that supports dual-fuel or heat pump with auxiliary heat
Model numbers and the AHRI certificate for the matched outdoor unit and indoor coil
Refrigerant type (R-454B or R-32) and whether a new line set is needed
Which state or utility rebates the installer will process
Warranty terms for parts, compressor and labor

Frequently asked questions

Should I replace my AC with a heat pump?

In most cases, yes. A heat pump cools just as well, costs only about $1,000–$2,500 more when you keep your furnace, and adds efficient heating. It pays off fastest if you heat with electricity, propane or oil.

Can I replace my AC with a heat pump and keep my gas furnace?

Yes. That’s a dual-fuel (hybrid) system. The heat pump handles cooling and mild-weather heating, and the furnace takes over in the coldest weather. You’ll need a compatible thermostat.

Is a heat pump as good as an AC for cooling?

Yes. In cooling mode a heat pump works exactly like an air conditioner. Units with the same SEER2 rating cool equally well.

Does a heat pump cost more to run than an AC?

Not for cooling; summer costs are the same at the same SEER2. In winter, a heat pump uses electricity to heat, which usually replaces more expensive fuel use.

Do heat pumps last as long as air conditioners?

Slightly less: about 12–15 years versus 15–20 for an AC, because heat pumps run year-round. A dual-fuel setup can extend a heat pump’s life.

Is there a tax credit for replacing an AC with a heat pump in 2026?

No. The federal 25C credit ended for systems installed after December 31, 2025. Check state and utility rebates, which often favor heat pumps over central AC.

Related guides

Heat Pump vs Gas Furnace: Total Cost Over 15 Years
Dual-Fuel Hybrid Heat Pump vs All-Electric: Which Saves More?
Is a Heat Pump Still Worth It Without the Federal Tax Credit?
What Size Heat Pump Do I Need? Sizing by Square Footage and Climate Zone
How to Compare Heat Pump Quotes: A Line-by-Line Checklist
Heat Pump Installation Cost in 2026: Real Prices by Home Size and System Type

Costs and savings are illustrative 2026 estimates for a 2,000 sq ft home using US-average energy prices. Your results will depend on your climate, home, equipment and local rates.