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The fast filter is a rule of thumb, not an industry standard: multiply system age by the repair quote. Above $5,000? Get a replacement quote before approving the repair. Below? Repair usually makes sense. The real answer adjusts for system type (a cracked heat exchanger, or a failed compressor on an AC over 10 years old, usually tips toward replace), refrigerant (R-22 costs $90 to $150 per pound vs. $20 to $50 for R-410A, per our cost guide), efficiency gap (ENERGY STAR-certified gas furnaces in the northern U.S. are up to 18 percent more efficient than standard models, per ENERGY STAR), and the 2026 reality (federal 25C tax credit terminated 12/31/2025 by OBBBA; HEEHR rebates in select states, which no longer cover switching from gas to a heat pump). This guide is the framework for working through it.
You are looking at a repair quote that feels too high — or you are looking at a system that has been quietly limping along and you sense the next failure is coming. The repair-or-replace decision is rarely just about money. It is about where this system fits in the curve of remaining useful life, what the next 24 months of operating cost and repair risk actually look like, and whether the technology that's replaceable today (heat pumps, condensing furnaces, variable-speed everything) buys back the upfront premium.
This framework is the structural answer. Five questions, real cost math, system-type modifiers, and the 2026 reality of disappearing federal tax credits and rolling state rebates. Cost figures throughout come from our complete 2026 HVAC Cost Guide, the site’s single pricing reference (Cool Call Pro editorial estimates; your local quotes will differ).
The 5-Question Decision Framework
Every repair-or-replace call answers five questions. Get all five right and the answer is usually obvious; get any one wrong and you can pay $5,000 to find out.
1. How old is the system, exactly?
Look for the manufacturer’s nameplate on the indoor unit or the outdoor cabinet. The manufacture date is either printed there or encoded in the serial number, and the technician can decode it for your brand. Check the label rather than relying on memory. Age sets the baseline for the rest of this framework: ENERGY STAR suggests it may be time to talk to a contractor about replacement once a heat pump or air conditioner is more than 10 years old, or a furnace is more than 15.
2. What is the actual repair quote, broken down by parts and labor?
Get the quote itemized. If the quote does not separate parts from labor, ask for a written breakdown: it is the only way to compare two quotes line by line, and the framework math depends on knowing the real numbers.
3. What component failed, and what does that signal about the rest?
Some failures are isolated; others are end-of-life signals. A capacitor failure in year 5 is normal and isolated — replace it, move on. A compressor failure in year 12 is different: the compressor is the most expensive AC repair in our cost guide, and every other part of the system is just as old. Likewise, a flame sensor cleaning on a 7-year-old furnace is fine; a heat exchanger crack on the same furnace is end-of-life. The component matters more than the dollar figure in many cases.
4. What is the system's refrigerant type and efficiency rating?
Older R-22 (HCFC-22) systems face a hidden tax. R-22 is an ozone-depleting refrigerant that EPA has phased out except for limited uses such as servicing existing equipment, and our cost guide puts it at $90 to $150 per pound vs. $20 to $50 per pound for R-410A. A leak that needs 3 pounds added is $270 to $450 in R-22 vs. $60 to $150 in R-410A, before labor. Efficiency rating (SEER2 or SEER on an AC, AFUE on a furnace) determines the operating-cost gap to a new unit. For example, replacing an 80% AFUE furnace with a 95% AFUE model cuts gas use by about 16 percent (1 − 80 ÷ 95); DOE’s federal purchasing guidance shows the same gap in its northern-region example, 621 vs. 523 therms a year.
5. How long do you expect to be in this house?
Simple payback is the extra installed cost divided by the annual energy savings, and it depends on your own energy prices and run hours (DOE’s federal purchasing guidance shows the method). If you are selling in 2 years, the math shifts toward repair (you do not capture the savings). The longer you stay, the more of the savings you keep. This is the question vendors never ask but you should never skip — it can completely flip the answer.
The $5,000 Rule and Why It Oversimplifies
A common rule of thumb (not an industry standard): multiply the system's age by the repair estimate. If the result exceeds $5,000, get a replacement quote before approving the repair. Below $5,000, repair usually makes sense.
- 12-year-old AC, $1,200 compressor: 12 × $1,200 = $14,400 → replace
- 5-year-old AC, $400 capacitor: 5 × $400 = $2,000 → repair
- 17-year-old furnace, $300 ignitor: 17 × $300 = $5,100 → replace (and the furnace is already past ENERGY STAR’s 15-year mark)
- 8-year-old furnace, $250 flame sensor cleaning: 8 × $250 = $2,000 → repair
The rule captures something real: a repair on an old system buys fewer remaining years, so a single repair quote understates the real cost of keeping it. But it oversimplifies in three specific ways:
It ignores component severity. A heat exchanger crack is end-of-life regardless of what the multiplication says. A control board on a young system might multiply to "replace" on the math, but it is a one-and-done repair on a healthy unit.
It ignores refrigerant type. Two identical-age AC systems with $800 leak repairs — one R-22, one R-410A — face very different futures. The R-22 system will keep paying phase-out prices for refrigerant ($90 to $150 per pound vs. $20 to $50 for R-410A, per our cost guide); the R-410A system is fine.
It ignores efficiency-gap recapture. Replacement is not just a cost: a more efficient unit also lowers the energy bill every year it runs. ENERGY STAR says certified units, installed correctly, can save up to 20 percent on heating and cooling costs when they replace an AC or heat pump more than 10 years old. The rule treats replacement as pure expense, when it is partly an investment that pays back.
Use the $5,000 rule as the fast filter, then apply the next four sections to refine the answer in either direction.
Repair Cost Thresholds by Component
Here are the 2026 repair and replacement ranges from our cost guide, each paired with a rule-of-thumb signal:
| Component | 2026 Cost | Rule-of-Thumb Signal |
|---|---|---|
| Diagnostic / service call | $65–$150 | Some providers credit it toward the repair; ask when you call |
| Capacitor (AC) | $150–$400 | Usually repair |
| Contactor | $100–$300 | Usually repair |
| Refrigerant recharge (R-410A) | $150–$600 | Find & fix the leak first; a recharge alone only delays the problem |
| Furnace ignitor | $100–$300 | Usually repair |
| Furnace flame sensor cleaning/replacement | $75–$250 | Usually repair |
| Furnace gas valve | $200–$600 | Repair on younger systems; run the $5,000 rule past 10 years |
| Furnace draft inducer motor | $200–$700 | Repair on younger systems; run the $5,000 rule past 10 years |
| Blower motor | $300–$1,000 | Run the $5,000 rule |
| Furnace control board | $300–$900 | Run the $5,000 rule |
| AC evaporator coil | $600–$2,000 | Get a replacement quote if the system is over 10 years old |
| AC compressor | $1,200–$3,500 | Get a replacement quote if the system is over 10 years old |
| Furnace heat exchanger | $600–$4,000 | Get a replacement quote on older furnaces; do not run a furnace with a confirmed crack (CO risk) |
| Emergency / after-hours surcharge | $100–$300 | Pay only when truly unsafe to wait |
| Full AC replacement (3-ton) | $3,200–$7,000 | The replace target |
| Gas furnace replacement | $2,500–$6,500 | The replace target |
| Heat pump system (ducted, 2–3 ton, standard efficiency) | $7,600–$9,500 | The replace target if you switch to a heat pump |
| AC + furnace combined | $5,800–$12,000 | Ask for a combined quote and separate quotes, then compare |
Ranges from our 2026 cost guide (Cool Call Pro editorial estimates). Signals are rules of thumb, not industry standards. Actual costs vary by region, provider, and system age.
The Age-Adjusted Decision Matrix
Apply the system age and repair cost to this matrix to get a directional answer. The dollar cut-offs are simply the $5,000 rule worked out for each age (5,000 ÷ age), so treat them as a rule of thumb, not a standard:
- System age 0–5 years: Repair usually wins. The $5,000 rule only flags repairs above about $1,000 at 5 years, and the equipment may still be under the manufacturer’s parts warranty — check the warranty terms before paying for parts. Replacing a young system over one repair throws away most of its service life.
- System age 6–10 years: The cut-off falls from about $830 (6 years) to $500 (10 years). Below it, repair; above it, get a replacement quote. R-22 systems hit the threshold sooner because every refrigerant top-up costs more.
- System age 11–14 years: The cut-off is roughly $450 to $360, so minor repairs (capacitor, contactor, drain line, thermostat, ignitor, flame sensor — $75 to $500 in our cost guide) can still pass. A heat exchanger crack or compressor failure points to replacement. An AC or heat pump this age is already past ENERGY STAR’s 10-year mark.
- System age 15–18 years: The cut-off is roughly $330 to $280, so only the cheapest repairs pass. A furnace is now past ENERGY STAR’s 15-year mark as well. Get a replacement quote alongside any repair quote so the next failure is not an emergency decision.
- System age 19+ years: The cut-off drops below about $265, so nearly any repair fails the rule. Plan the replacement rather than waiting for a no-heat or no-cool day.
Climate changes the math too, mostly through run hours: the more hours a system runs, the more an efficiency upgrade saves each year. DOE’s federal purchasing guidance even assumes different central-AC service lives by region — 18 years in hot-humid Southeast states, 25 in hot-dry Southwest states and 24 in northern states (DOE FEMP) — so no single age cut-off fits everywhere. In heating-dominated Cheyenne, WY and Indianapolis, the furnace side carries more weight; in Fresno, CA’s hot-dry summers, the AC does; Wilmington and Knoxville put real load on both.
System-Type Modifiers: AC vs Furnace vs Heat Pump
The framework adjusts by system type. Each technology has different end-of-life signals and different replace economics:
AC systems: Compressor failure is the defining end-of-life event. A compressor replacement runs $1,200 to $3,500 in our cost guide, against $3,200 to $7,000 for a complete 3-ton AC, and after the repair every other part of a 10+ year system is still just as old. On a system past ENERGY STAR’s 10-year mark, get a full-replacement quote before approving a compressor. See our complete AC troubleshooting guide for the full failure-mode picture.
Gas furnaces: A cracked heat exchanger is the classic end-of-life event. The heat exchanger keeps combustion gases, including carbon monoxide, out of the air your blower circulates, so a confirmed crack is a safety problem, not just a repair line: do not keep running the furnace, and weigh a heat exchanger repair ($600 to $4,000) against a new gas furnace ($2,500 to $6,500), both per our cost guide. Signs a technician looks for during a tune-up: rust streaking, soot around the burners, a wavy yellow flame instead of a steady blue one. For age, DOE’s federal purchasing guidance assumes a 21-year average furnace life (DOE FEMP). Our furnace diagnostic guide covers the full end-of-life signal set.
Heat pumps: Compressor failure is also the end-of-life event, similar to AC, but a heat pump works in both seasons. DOE’s federal purchasing guidance assumes a 15-year average life for an air-source heat pump, versus 18 to 25 years for a central AC depending on region (DOE FEMP). The repair-vs-replace math also has a different shape: a heat pump that needs replacing is a chance to right-size the system, possibly with cold-climate technology if the home is in a cold zone. See our heat pump vs gas furnace comparison for the full replacement decision.
Dual-fuel systems (heat pump + small gas furnace backup): The heat pump and furnace have independent end-of-life curves and can be replaced separately. When one fails, evaluate that side alone with the framework, then check the age of the other side: if it is also near the end of its life, ask for a quote on both.
The 2026 Reality: OBBBA, IAQ, and the Heat-Pump Shift
Three things shape a repair-or-replace decision in 2026:
The federal Section 25C Energy Efficient Home Improvement Credit is gone. The One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025) terminated 25C for property placed in service after December 31, 2025. HVAC equipment installed in 2026 does not qualify for the federal credit. If your install was completed by Dec 31, 2025, you can still claim the credit on your 2025 tax return — see the IRS Section 25C page. For 2026 installs, the federal subsidy is closed.
HEEHR (High-Efficiency Electric Home Rebate program) is available in select states, but it no longer pays for switching from gas. The statute caps the rebate at up to $8,000 for an income-qualified heat pump. Under DOE Program Notice 26-2 (effective May 29, 2026), DOE removed rebates for fuel switching — replacing non-electric equipment such as a gas, oil, or propane furnace or boiler — and now allows HEEHR rebates only for upgrading existing electric heating and cooling equipment to more efficient electric equipment, plus HVAC in new construction. So if you are replacing a gas furnace with a heat pump, do not build a HEEHR rebate into your math; if you are replacing electric equipment (for example, electric resistance heat or an older heat pump), ask your state program whether you qualify. Per DOE, rebates are available in select states only. Check your state energy office for current availability. Some utilities run their own rebates too; search by ZIP code in DSIRE or ask your utility.
Indoor air quality can factor into the decision. A replacement is a chance to ask about a filter rack that fits higher-MERV filters, a variable-speed blower, and — if you switch to an all-electric heat pump — removing the furnace as a combustion source in the home. For families with respiratory health concerns, those features may be worth weighing alongside the cost math.
The honest framing: do the framework math without counting on federal credits, then treat any state or utility rebate as a bonus. Be wary of any quote for a 2026 install that counts on a federal tax credit, and ask the contractor to show which state or utility program any promised rebate comes from. This is general guidance, not tax advice; consult a qualified tax professional and your state energy office for your specific situation.
Get connected with a technician in your ZIP code.
Call Now — (844) 582-1795Disclosure: We are a referral service and may receive compensation for qualified calls. Calls may be routed to an independent provider network and may be recorded. Pricing and availability vary by provider and location.
Climate-Specific Considerations
Climate changes which system carries the load, and that changes where the efficiency savings come from:
Cold-humid climates (Indianapolis, Wilmington, the Great Lakes, Mid-Atlantic): The furnace carries the longer season, so its AFUE and heat-exchanger condition drive the decision, and every point of AFUE is worth more per year. ENERGY STAR recommends a contractor check the heating system every fall — see our maintenance playbook.
Mountain / cold-dry climates (Cheyenne, Salt Lake City, Reno): Long heating seasons make the AFUE gap worth more per year, so run the AFUE math above with your own gas bill. At high altitude, ask the installer how a new furnace will be set up for your elevation.
Mixed-humid climates (Knoxville, Charlotte, Nashville): Both the AC and the heating system carry real load. If both are past ENERGY STAR’s age marks (10 years for the AC, 15 for the furnace), ask for one quote to replace both together and separate quotes for each, and compare.
Hot-dry climates (Fresno, Phoenix, Tucson, Las Vegas): The AC carries the load, so cooling efficiency matters most: under DOE’s method, savings scale with cooling hours. Heating-side decisions matter less here and can often wait.
Browse local service providers in Cheyenne, Indianapolis, Wilmington, Knoxville, or Fresno, or browse our full Wyoming and Indiana state hubs.
When to Get a Second Opinion
Always get a second quote when:
- The repair quote is over $1,000
- The technician recommends full replacement on a system under 10 years old
- The technician will not show you measurements (capacitor microfarads, refrigerant pressures, manometer reading, heat exchanger borescope, CO measurement)
- The quote does not separate parts from labor
- You feel pressure for a same-day decision on a five-figure repair
- The technician quotes a "package deal" replacement without itemizing
Whichever way you lean, ask the technician quoting the job — or a second technician — these questions before you commit:
- “What is the complete cost, itemized by parts and labor?” Get it in writing before agreeing to anything.
- “Are other components near the end of their life that I should factor in?” A borderline capacitor or a pitted coil changes the math.
- “What refrigerant does my system use, and how will that affect future service costs?” This matters most on R-22 systems (see our refrigerant guide).
- “If I replace, what size and efficiency do you recommend, and why?” Sizing should come from a load calculation (ACCA Manual J), not from the old unit’s nameplate.
- “Which rebates apply to my replacement?” The federal Section 25C credit ended for 2026 installations; utility rebates and your state’s HEEHR program (where launched, and only when you are replacing existing electric equipment) are what remain.
Quotes for the same job can differ between providers, so comparison-shopping a major repair or a replacement is worth the time. Cool Call Pro connects homeowners with independent technicians for these comparison quotes — the second opinion is the cheapest insurance you will buy.
Deep-Dive Guides for Specific Scenarios
This framework is the pillar of our repair-or-replace series. Related guides in this series apply it to specific decisions:
Should I Put $1,000 into a 12-Year-Old AC?
The framework applied to one common scenario: a four-figure repair on an aging AC.
Heat Pump vs. Gas Furnace: Cheaper to Run?
When replacement opens the heat pump option: operating cost by energy price.
14 SEER vs. 18 SEER: Years to Payback?
How to work out whether a higher-efficiency AC pays back its extra cost.
More reference guides:
- 2026 HVAC Cost Guide — pricing for every repair and replacement decision
- Year-Round HVAC Maintenance Playbook — the maintenance schedule for your system
- Complete AC Troubleshooting Guide — AC failure modes and what each signals about remaining life
- Furnace Not Working? Diagnostic Guide — furnace failure modes and the heat-exchanger-crack signal
- HVAC Financing Options — how to fund a replacement when the math says replace
Trusted Industry Sources
The guidance in this article is consistent with published recommendations from:
- ENERGY STAR — Heat & Cool Efficiently
- DOE FEMP — Purchasing Energy-Efficient Residential Central Air Conditioners
- EPA Section 608 — Refrigerant Handling Regulations
- CDC — About Carbon Monoxide (relevant for heat exchanger decisions)
- ENERGY STAR — Clean Heating & Cooling
- IRS Section 25C (terminated for 2026 installs; 2025 returns still eligible)
A technician can assess your system and walk you through your options.
Call Now — (844) 582-1795Disclosure: We are a referral service and may receive compensation for qualified calls. Calls may be routed to an independent provider network and may be recorded. Pricing and availability vary by provider and location.
Frequently Asked Questions
A common rule of thumb (not an industry standard): multiply the system's age by the repair quote. If the result exceeds $5,000, get a replacement quote before approving the repair. A 12-year-old AC with a $1,200 compressor quote (12 × 1,200 = 14,400) points toward replacement. A 5-year-old AC with a $400 capacitor repair (5 × 400 = 2,000) points toward repair. The rule is a starting point — climate, refrigerant type, AFUE rating, and how long you plan to stay adjust the answer in either direction. ENERGY STAR suggests talking to a contractor about replacement once an AC or heat pump is more than 10 years old or a furnace is more than 15, and a cracked heat exchanger or a failed compressor on an older AC usually points to replacement.
Often not, but it depends on the repair. The $5,000 rule of thumb puts the cut-off for a 15-year-old system at about $330 (15 × $333 ≈ $5,000), and a 15-year-old AC or heat pump is already past ENERGY STAR's 10-year replacement mark. A minor repair (capacitor, contactor, drain line, thermostat — $75 to $500 in our cost guide) can still be reasonable on a well-maintained system that uses R-410A rather than R-22. A major repair such as a compressor or heat exchanger usually points to replacement.
Multiply the system's age (in years) by the repair quote. If the result exceeds $5,000, get a replacement quote before approving the repair. It is a rule of thumb, not an industry standard, and it captures two things: (1) a repair on an old system buys fewer remaining years, so a single repair quote understates the real cost of keeping it; (2) newer systems with minor repairs are worth keeping. Climate, refrigerant type (R-22 costs $90 to $150 per pound vs. $20 to $50 for R-410A, per our cost guide), AFUE/SEER rating, and warranty status all shift the cut-off up or down. Use it as a fast filter, not a final answer.
Yes — until the operating cost or repair frequency makes replacement cheaper. To estimate how much more an old AC costs to run, use DOE's method: the share of cooling electricity saved by moving to a higher rating is 1 − (old rating ÷ new rating), so going from 13 SEER to 15 SEER cuts cooling electricity by about 13%. Multiply that share by your annual cooling electricity cost and by the years you expect to stay, then compare with the replacement price. R-22 systems are particularly worth flagging — R-22 costs $90 to $150 per pound in our cost guide, so a top-up of 2 to 3 pounds is $180 to $450 in refrigerant alone, and a system that needs refrigerant has a leak.
You usually cannot tell yourself, and you should not open the furnace to look. Signs that call for a technician: a CO alarm sounding while the furnace runs, soot around the furnace, or a technician's report of rust streaking or an abnormal (yellow or wavy) burner flame during a tune-up. A technician can inspect the heat exchanger and measure CO with a combustion analyzer; ask to see the photos or readings. If a CO alarm sounds, do not look for the source: get everyone outside to fresh air and call 911 or the fire department (CPSC guidance). A confirmed crack is a carbon monoxide risk: do not keep running the furnace, and weigh a heat exchanger repair ($600 to $4,000 in our cost guide) against a new gas furnace ($2,500 to $6,500).
On AC systems older than 10 years (ENERGY STAR's replacement mark), get a full-replacement quote before approving a new compressor. In our cost guide, a compressor replacement runs $1,200 to $3,500, while a complete 3-ton AC runs $3,200 to $7,000 installed and comes with a new manufacturer warranty. After a compressor swap, every other part of the system is still as old as it was. By the $5,000 rule of thumb, any compressor quote in that range on a 12-year-old system (12 × $1,200 = $14,400) points toward replacement.
Borderline — it depends on the repair. By the $5,000 rule of thumb, a 10-year-old furnace breaks even at a $500 repair quote. In our cost guide, an ignitor ($100 to $300) or flame sensor ($75 to $250) sits below that line; a gas valve ($200 to $600), draft inducer ($200 to $700), control board ($300 to $900) or blower motor ($300 to $1,000) can land on either side; a heat exchanger ($600 to $4,000) usually lands above it. Climate matters too — a furnace that carries a long heating season, as in Indianapolis, earns more from an efficiency upgrade than one in milder Knoxville. Always get the AFUE rating from the nameplate before deciding.
AFUE (Annual Fuel Utilization Efficiency) is the ratio of useful heat output to fuel input over a whole heating season, expressed as a percentage (DOE). You will find it on the furnace nameplate. The efficiency gap matters for the replace decision: replacing an 80% AFUE furnace with a 95% AFUE model cuts gas use by about 16 percent (1 − 80 ÷ 95). DOE's federal purchasing example for the northern region shows 621 therms a year at 80% AFUE vs. 523 therms at 95%. ENERGY STAR says certified gas furnaces in the northern half of the U.S. are up to 18 percent more energy efficient than baseline models.
The federal Section 25C Energy Efficient Home Improvement Credit was terminated for property placed in service after December 31, 2025 by the One Big Beautiful Bill Act (Public Law 119-21, signed July 4, 2025). HVAC equipment installed in 2026 does not qualify for the federal credit. The High-Efficiency Electric Home Rebate (HEEHR) program is available in select states and may offer up to $8,000 toward an income-qualified heat pump, but under DOE Program Notice 26-2 (effective May 29, 2026) it no longer covers fuel switching: rebates apply to upgrading existing electric heating or cooling equipment to more efficient electric equipment, and to new construction, not to replacing a gas, oil, or propane furnace or boiler. Rules and availability vary by state program — check your state energy office. Some utilities also offer their own rebates; check with your utility. This is general guidance, not tax advice; consult a qualified tax professional for your specific situation.
There is no single number. DOE's federal purchasing guidance assumes an average service life of 18 to 25 years for a residential central air conditioner (18 in hot-humid Southeast states, 25 in hot-dry Southwest states, 24 in northern states), 15 years for an air-source heat pump, and 21 years for a gas furnace. These are life-cycle-cost modelling assumptions, not a promise of how long any one unit will last. For repair-or-replace timing, ENERGY STAR's marks are more practical: consider replacement once an AC or heat pump is more than 10 years old or a furnace is more than 15, especially if it needs frequent repairs while energy bills are rising. See our maintenance playbook for the maintenance schedule.
If both systems are near the end of their service life (for example, an AC past ENERGY STAR's 10-year mark and a furnace past its 15-year mark), price it both ways: ask for one quote to replace both together and separate quotes for each, then compare. Our cost guide lists an AC + furnace split system at $5,800 to $12,000 installed, against $3,200 to $7,000 for a 3-ton AC alone and $2,500 to $6,500 for a gas furnace alone. If one system is much newer than the other, replacing only the older one can make sense; ask the installer to confirm the new unit is compatible with the one you keep.
Signals that usually tip the decision toward replacement: (1) age past ENERGY STAR's marks (10+ years for an AC or heat pump, 15+ for a furnace) combined with a major repair quote; (2) a confirmed cracked heat exchanger on a furnace; (3) compressor failure on an AC over 10 years old; (4) repeated breaker trips after professional repair attempts; (5) frequent repairs while your energy bills keep rising, which ENERGY STAR lists as a sign to call a contractor; (6) an R-22 system that needs refrigerant. Two or more of these make replacement the likely answer. Less obvious but still pointing toward replacement: rooms that never reach setpoint despite the system running constantly, or repeated short-cycling that survives multiple repair attempts.
Often, yes. A heat pump handles both heating and cooling, so it can replace both an AC and a gas furnace. Whether it is cheaper to run depends on your local electricity and gas prices and on how efficiently the heat pump runs in your climate: at 2025 U.S. average residential prices (EIA), a heat pump has to average a COP of about 3.3 to match the heating cost of a 95% AFUE gas furnace. In cold climates, look for ENERGY STAR Cold Climate models, which must keep at least 70% of their 47°F heating capacity at 5°F; ENERGY STAR says pairing them with a backup heat source is the most efficient way to heat at even lower temperatures, which is what a dual-fuel system (heat pump plus gas furnace) does. See our heat pump vs. gas furnace comparison for the cost math.
Per our 2026 cost guide: a full AC replacement for a 3-ton system runs $3,200 to $7,000 installed. A gas furnace runs $2,500 to $6,500 installed. An AC + furnace split system runs $5,800 to $12,000. A ducted heat pump system (2–3 ton, standard efficiency) runs $7,600 to $9,500; cold-climate and high-efficiency models cost more (see the cost guide). Complex retrofits or duct modifications add $500 to $2,000 or more. Night, weekend, and holiday calls add $100 to $300 on top of the repair cost. These are Cool Call Pro editorial estimates — actual costs vary by region, system size, and provider.
Yes — for any repair over $1,000 or any replacement decision, get 2 to 3 written quotes. Quotes for the same job can differ between providers, so comparing is worth the time. Ask each technician to show you the readings that justify their recommendation: capacitor microfarads, refrigerant pressures, manometer reading on gas furnaces, heat exchanger borescope photos. A technician who refuses to show measurements or pushes for same-day decisions on a five-figure repair is a flag. Cool Call Pro connects homeowners with independent technicians for these comparison quotes — call (844) 582-1795.
The manufacturer warranty (from brands such as Carrier, Trane, Lennox, Goodman, or Rheem) covers defective components for periods that vary by brand, model, and part; read the warranty document for your exact model and check whether it covers labor. The contractor warranty is separate: it comes from the installer and covers their workmanship, for whatever term they put in writing. Check whether your brand requires product registration or maintenance records to keep full coverage, and keep your service records either way.
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