Key takeaways
- Typical cost in South Hooksett: $7,000–$12,000 (for a combined AC and furnace replacement); national range $7,000–$12,000.
- Biggest local factors: hard freezes, long heating season and high humidity.
- How long it takes: Most AC or furnace swaps take one day.
- Permits: Replacing an AC, heat pump or furnace usually needs a mechanical permit, and the installer normally pulls it.
- Best timing: Book furnace or heat pump service in early fall, before the first hard freeze.
- Before you hire: get at least three written, itemized quotes from licensed, insured New Hampshire contractors.
How much does HVAC repair and replacement cost in South Hooksett, NH?
Replacing a central AC and furnace together typically costs $7,000–$12,000 installed. An AC alone runs about $2,500–$9,000 and a furnace $2,000–$6,900, depending on size, efficiency and brand. Most single repairs cost $250–$700. New Hampshire prices run at the U.S. average, so a typical South Hooksett job lands around $7,000–$12,000. Local labor rates, permit fees and your home's specifics move the final number.
| Job | Typical cost | Notes |
|---|---|---|
| AC + furnace replacement | $7,000–$12,000 | Average-size home, standard efficiency |
| Central AC replacement | $2,500–$9,000 | Higher-SEER2 units cost more up front |
| Furnace replacement | $2,000–$6,900 | 90%+ AFUE models run $3,300–$6,900 |
| Heat pump system | $5,000–$18,000+ | High-efficiency and multi-zone at the top end |
| Average AC repair | $250–$700 | National average about $375 |
| Capacitor replacement | $100–$400 | One of the most common summer repairs |
| Refrigerant leak repair | $200–$1,500 | Recharge alone $100–$600 after the leak is fixed |
In a smaller community like South Hooksett, some specialists travel in from nearby cities and may add a trip charge. Ask whether travel is included, and consider bundling projects.
How we calculate costs
National ranges come from published cost surveys (cited below). Local estimates apply an approximate state cost index. Read our methodology.
HVAC cost questions for South Hooksett, NH
- What is the cost of AC + furnace replacement in South Hooksett, NH? The typical cost of AC + furnace replacement in South Hooksett, NH is $7,000–$12,000. Average-size home, standard efficiency.
- What is the cost of central AC replacement in South Hooksett, NH? The typical cost of central AC replacement in South Hooksett, NH is $2,500–$9,000. Higher-SEER2 units cost more up front.
- What is the cost of furnace replacement in South Hooksett, NH? The typical cost of furnace replacement in South Hooksett, NH is $2,000–$6,900. 90%+ AFUE models run $3,300–$6,900.
- What is the cost of heat pump system in South Hooksett, NH? The typical cost of heat pump system in South Hooksett, NH is $5,000–$18,000+. High-efficiency and multi-zone at the top end.
- What is the cost of average AC repair in South Hooksett, NH? The typical cost of average AC repair in South Hooksett, NH is $250–$700. National average about $375.
- What is the cost of capacitor replacement in South Hooksett, NH? The typical cost of capacitor replacement in South Hooksett, NH is $100–$400. One of the most common summer repairs.
- What is the cost of refrigerant leak repair in South Hooksett, NH? The typical cost of refrigerant leak repair in South Hooksett, NH is $200–$1,500. Recharge alone $100–$600 after the leak is fixed.
- What is the cost of compressor replacement in South Hooksett, NH? The typical cost of compressor replacement in South Hooksett, NH is $600–$3,000. Often triggers a replace-the-system decision.
- What is the cost of evaporator coil replacement in South Hooksett, NH? The typical cost of evaporator coil replacement in South Hooksett, NH is $400–$2,700. Coil leaks are common on older systems.
- What is the cost of blower motor replacement in South Hooksett, NH? The typical cost of blower motor replacement in South Hooksett, NH is $300–$2,000. Variable-speed motors cost more.
- What is the cost of thermostat replacement in South Hooksett, NH? The typical cost of thermostat replacement in South Hooksett, NH is $150–$500. Smart thermostats at the higher end.
What affects HVAC repair and replacement in South Hooksett
South Hooksett has cold, snowy winters and warm summers. Book furnace or heat pump service in early fall, before the first hard freeze.
Signs your HVAC system needs repair
- Warm air from vents or the system can't reach the thermostat setting
- Short cycling — turning on and off every few minutes
- Ice on the refrigerant lines or outdoor unit
- Grinding, squealing, banging or buzzing noises
- Water pooling around the indoor unit
- A sudden jump in energy bills
- Burning or musty smells from vents
One symptom doesn't always mean a big repair. A clogged filter or tripped breaker causes many no-cooling calls, so check those first.
Common questions about HVAC repair and replacement in South Hooksett
How much does a new AC unit cost for a 2,000 sq ft house in South Hooksett, NH?
Most 2,000 sq ft homes need a 3–4 ton system. A central AC replacement alone typically runs $2,500–$9,000 nationally, and replacing both the AC and furnace costs about $7,000–$12,000 in South Hooksett, NH.
Is it worth repairing a 15-year-old AC?
Usually not. Use the $5,000 rule: multiply the unit's age by the repair cost. If the result is over $5,000, replacing is usually the better value. A $400 repair on a 15-year-old unit scores $6,000.
How long does an HVAC system last in South Hooksett, NH?
Furnaces typically last 15–20 years, and central air conditioners and heat pumps 10–15 years. Long cooling seasons and skipped maintenance shorten those lives.
What size AC do I need for my house?
A rough rule is one ton of cooling per 500–600 square feet, but insulation, windows, climate and ductwork change that. Ask for a Manual J load calculation instead of a square-footage guess.
Should I replace my AC and furnace at the same time?
Often yes when both are over 12–15 years old. A matched system runs more efficiently, and you pay for one installation visit and one permit instead of two.
Why is my AC running but not cooling?
The usual causes are a clogged filter, a frozen evaporator coil, a tripped outdoor unit, a failed capacitor or low refrigerant from a leak. Replace the filter and check the breaker first; if that doesn't fix it, call a technician.
How much does an AC tune-up cost?
A tune-up typically costs about $75–$200 per visit. Many companies offer maintenance plans that bundle a spring AC and fall furnace check.
Are there rebates for a new heat pump in South Hooksett, NH?
Federal energy tax credits changed in 2025, so check current IRS guidance. Utilities and some states still offer rebates for high-efficiency heat pumps, so ask installers which programs apply in South Hooksett, NH.
Timeline, permits and DIY in South Hooksett
How long it takes
Most AC or furnace swaps take one day. A full system with new ductwork takes 2–5 days.
Permits
Replacing an AC, heat pump or furnace usually needs a mechanical permit, and the installer normally pulls it. Check with the South Hooksett building department for local rules.
DIY or hire a pro?
Filters, clearing debris from the outdoor unit and flushing the condensate line are safe DIY jobs. Refrigerant, gas and electrical work need a licensed technician.
Questions to ask South Hooksett contractors
Ask every bidder the same questions so you can compare quotes apples to apples.
- Will you do a Manual J load calculation instead of sizing by square footage?
- What SEER2, HSPF2 or AFUE rating is quoted, and does it qualify for rebates or tax credits?
- Are the permit, haul-away and thermostat included?
- What is the labor warranty, separate from the parts warranty?
Maintenance that prevents costly repairs
- Replace filters every 1–3 months
- Book a tune-up before each cooling and heating season
- Keep 2 feet of clearance around the outdoor unit
How to hire for HVAC repair and replacement in South Hooksett
- Confirm the contractor is licensed for HVAC work in New Hampshire and insured.
- Ask for a Manual J load calculation instead of a size-by-square-feet guess.
- Get three written quotes listing exact equipment model numbers and SEER2/AFUE ratings.
- Compare labor warranties, not just manufacturer warranties.
- Make sure the quote includes permits, haul-away and thermostat setup.
HVAC in South Hooksett: FAQs
How much does HVAC replacement cost in South Hooksett, NH?
Most South Hooksett homeowners can plan on $7,000–$12,000 to replace a central AC and furnace together, or about $2,500–$9,000 for an AC alone. Local labor rates, ductwork and permits in South Hooksett move the final price.
When is the best time to replace an HVAC system in South Hooksett?
Spring and fall are the slow seasons for HVAC contractors in South Hooksett, so you'll usually get faster scheduling and better pricing than during a summer heat wave or winter cold snap.
Is a heat pump a good idea in South Hooksett?
It can be. South Hooksett has a long heating season, so look at cold-climate heat pumps or a dual-fuel setup that pairs a heat pump with a gas furnace for the coldest days.
Do I need a permit to replace my AC in South Hooksett?
Most cities, including South Hooksett, require a mechanical permit for equipment replacement. A licensed contractor normally pulls it and schedules the inspection.
How much does HVAC repair and replacement cost in South Hooksett compared to the national average?
With New Hampshire's regional cost index of 1.00, expect roughly $7,000–$12,000 in South Hooksett, versus $7,000–$12,000 nationally.
How long does HVAC repair and replacement take in South Hooksett?
Most AC or furnace swaps take one day. A full system with new ductwork takes 2–5 days. Permit and inspection scheduling in South Hooksett can add a few days.
Do I need a permit for HVAC repair and replacement in South Hooksett?
Replacing an AC, heat pump or furnace usually needs a mechanical permit, and the installer normally pulls it. Confirm with the South Hooksett or county building department.
HVAC near South Hooksett
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Other home services in South Hooksett
Sources: PickHVAC — Furnace & AC replacement cost · Fixr — AC repair cost (2026). Ranges are rounded estimates; see our editorial policy.
Local risk factors reflect general New Hampshire climate patterns; check FEMA's National Risk Index for county-level ratings. Local estimates apply an approximate regional cost index to national ranges.