Furnace Repair in Londonderry
Get fast, fair pricing from licensed local pros. Typical Londonderry cost: $75 – $225 installed.
- Flame sensor
- $75 – $225
- Igniter
- $150 – $425
- Blower motor
- $375 – $1.4k
- Control board
- $275 – $750
What's going on with your HVAC system?
- Licensed& fully insured
- Same-dayservice available
- Upfrontpricing, no pressure
- Localpros, nationwide
Furnace repair cost by part.
Typical Londonderry repair pricing including parts and labor. A diagnostic fee usually applies and is often credited toward the work.
Furnace repair costs in Londonderry, New Hampshire, typically range from a $70–$175 diagnostic fee to component-specific pricing: flame sensor $75–$225, igniter $150–$425, blower motor $375–$1,400, control board $275–$750, and heat exchanger $1,400–$3,300+. With 80.3% homeownership and a median home built in 1983 (about 43 years old), many local furnaces are aging and may need repairs or replacement. New Hampshire requires a mechanical permit for furnace work, and the state's cold climate means proper sizing is critical for efficiency and comfort.
- Diagnostic / service callOften credited toward the repair$70 – $175
- Flame sensor or thermocoupleCommon no-heat cause on gas units$75 – $225
- Hot-surface igniterFurnace clicks but won’t light$150 – $425
- Blower motorNo airflow / weak airflow$375 – $1,400
- Heat exchangerCracked exchanger often means replace$1,400 – $3,300+
* A cracked heat exchanger is a safety issue — on an older furnace, replacement is usually the call.
Pricing reviewed · Local data from U.S. Census ACS
HVAC systems in Londonderry
U.S. Census ACS- Households
- 4,857
- Homeowners
- 3,734
- 80% own
- Median home value
- $392,000
- Median income
- $113,557
- Median home built
- 1983
- Housing units
- 4,649
With a median home built in 1983, many Londonderry AC and furnace systems are at or past their 12–15 year lifespan — a common reason replacements spike here.
Ready to get your HVAC system serviced in Londonderry?
Speak with a licensed, insured HVAC technician near you. Upfront pricing, same-day availability, no obligation.
- Licensed & insured
- Same-day availability
- Upfront, no-pressure pricing
- Local pros near you
No obligation — talk through your options.
What’s different about Londonderry.
Generic cost pages skip the things that actually decide your price and which system fits here — local code, climate, and the money you can claim back.
Recommended unit for Londonderry
Given New Hampshire’s cold climate and mixed heating, dual-fuel (cold-climate heat pump + gas furnace) is the sensible default for most Londonderry homes. The cooling season is short, so the budget is better spent on heating efficiency than on ultra-high SEER2. A pro can confirm the right size and system for your home with a load calculation.
Sources: NHSaves Heat Pumps (residential rebates) · NH Department of Energy Home Electrification & Appliance Rebates · Choose Energy NH electricity rates
What Londonderry code requires
Installing or replacing an HVAC system in Londonderry follows New Hampshire rules under the state mechanical code. Here’s what applies statewide:
- PermitRequired
Mechanical permit pulled by your licensed HVAC contractor; covers equipment, refrigerant, and the electrical disconnect.
- SEER2 minimum13.4 SEER2 (North)
Federal North-region minimum for new split-system AC. Higher tiers cut bills and unlock rebates.
- Load calculationRecommended
Sizing by load calc — not rule of thumb — prevents an oversized unit that short-cycles and never dehumidifies.
- RefrigerantR-454B / R-32 (R-410A phased down 2025+)
- Good to know—
Cold-climate sizing matters: NHSaves rebates require cold-climate heat pumps rated for low ambient (NEEP-listed) performance, and equipment must use R-32/R-454B (R-410A no longer allowed).
Sources: NHSaves Heat Pumps (residential rebates) · NH Department of Energy Home Electrification & Appliance Rebates · Choose Energy NH electricity rates
Not sure which rules and rebates apply to your home?
A licensed Londonderry pro will walk you through code, the right unit, and what you can claim back — in one quick call.
No obligation — talk through your options.
Money back in Londonderry
New Hampshire heating is mostly mixed, which shapes the money back:
- State$250 per ton, up to $1,250NHSaves Cold-Climate Heat Pump Rebate (standard tier, switching from oil/gas/propane) →
State or utility program — verify eligibility before you buy.
- State$750 (UEF 2.0+)NHSaves Heat Pump Water Heater Rebate →
State or utility program — verify eligibility before you buy.
- Federal30% of cost, up to $2,000Federal 25C tax credit — heat pump →
For a qualifying ENERGY STAR heat pump meeting the CEE efficiency tier. Claimed on your federal return.
- Federal30% of cost, up to $600Federal 25C tax credit — central AC →
For a qualifying high-efficiency central air conditioner.
The federal 25C tax credit (30%, up to $2,000 for a qualifying heat pump and up to $600 for a high-efficiency central AC) applies in every state, including New Hampshire.
Comfort back in three steps.
- 1
Tell us what’s wrong
Use the cost tool or call — takes 30 seconds. No cool air, no heat, or time for a new system.
- 2
Get matched with a local pro
We connect you with a licensed, insured HVAC technician near you — often the same day.
- 3
Repair or replace, fast
Your pro confirms the price on-site and gets your comfort back. Most jobs done in a few hours.
Furnace Repair in Londonderry, explained.
What influences furnace repair costs in Londonderry?
Labor rates reflect the local median household income of $113,557, and permit fees add to the total. The age of your home (median built 1983) can mean older systems with harder-to-find parts or more extensive repairs. Cold-climate sizing is important—undersized or oversized units reduce efficiency. Additionally, if a repair leads to replacement, federal 25C tax credits (30%, up to $2,000 for qualifying heat pumps) and NHSaves rebates (requiring cold-climate rated equipment with R-32/R-454B refrigerant) can affect overall costs.
Common furnace issues in Londonderry
Igniter failure
A worn-out igniter prevents the furnace from lighting, costing $150–$425 to replace.
Blower motor malfunction
A faulty blower motor reduces airflow and heating efficiency, with repair costs of $375–$1,400.
Heat exchanger cracks
Cracked heat exchangers can leak carbon monoxide and require replacement costing $1,400–$3,300+.
Furnace Repair FAQs — Londonderry
Yes, New Hampshire requires a mechanical permit for most furnace repairs and replacements. Your contractor should handle the permit, which adds to the overall cost.
Furnace Repair near Londonderry
Get a furnace repair quote.
No heat? Compare licensed local pros fast.