When your heating or cooling system breaks down, you need a qualified technician fast — especially in a state where winter temperatures regularly drop below zero and summers are increasingly hot and humid. Plumbing HVAC Services New Hampshire provides expert HVAC repair services for all system types throughout the Granite State, with same-day service and 24/7 emergency response.
HVAC Repairs We Perform in NH
Common HVAC Problems in New Hampshire Homes
Furnace Won't Start
The most common causes of a furnace that won't start are a failed hot surface ignitor (these have a limited lifespan of 3–7 years), a faulty flame sensor that shuts the system down as a safety measure, a clogged or cracked inducer, or a tripped pressure switch. Most of these are same-day repairs that restore heat quickly. We carry common ignitors and sensors on every service vehicle.
Furnace Runs But Doesn't Heat
If your furnace is running but blowing cool air, the burners may be failing to light (ignitor or gas valve issue), the heat exchanger may have a crack triggering the high-limit switch, or the thermostat may be misconfigured. A cracked heat exchanger is a serious safety issue — it allows combustion gases including carbon monoxide to enter the airstream — and requires immediate professional assessment.
AC Not Cooling
Low refrigerant (from a leak), a dirty evaporator or condenser coil, failed capacitor, or a failing compressor are the most common causes of an AC system that runs but doesn't cool. We diagnose with manifold gauges, amp draw testing, and visual inspection to find the root cause before recommending any repair.
Heat Pump Running Constantly
In very cold weather, a cold-climate heat pump running more frequently is normal — it's working harder as outdoor temperature drops. But a system running all day and night without reaching setpoint may have a refrigerant issue, a defrost control problem, or be undersized for the load. We distinguish between normal operation and a genuine fault.
Ready to Schedule Service?
Licensed NH technicians available 24/7. Same-day appointments available.
📞 (603) 555-0100Diagnostic Process
Thorough Diagnostic
We don't just replace parts hoping to find the fix — we perform a systematic diagnostic using calibrated instruments to identify the root cause of the failure.
Upfront Repair Quote
Once diagnosed, we present a written flat-rate repair quote. You approve it before we begin. If the repair cost approaches replacement cost, we'll tell you honestly and give you both options.
Professional Repair
Using quality OEM or equivalent parts, we complete the repair to manufacturer specifications. We carry an extensive parts inventory to minimize return trips.
System Test & Verification
We run the system through a complete cycle, verify normal operation, confirm safety controls are active, and document all work performed.
Preventive Maintenance — Fewer Repairs, Longer Life
The most cost-effective HVAC service is the one you don't need because you prevented the failure. Our annual maintenance program covers your heating and cooling systems with a comprehensive inspection and tune-up each fall and spring. Members receive priority scheduling, discounts on repairs, and the peace of mind that comes from knowing your systems are ready for NH's demanding seasons.
HVAC Repair FAQs
Simple repairs like capacitor or ignitor replacement run $150–$350. Motor replacements $300–$700. Control board replacement $400–$900. Compressor replacement $800–$2,500. We always provide a written estimate before beginning work.
Yes. We service all major HVAC brands including Carrier, Trane, Lennox, Bryant, Rheem, York, Goodman, Amana, Mitsubishi, Daikin, Fujitsu, and others. Our technicians receive multi-brand training and carry a broad parts inventory.
Yes, for most service calls. We prioritize no-heat calls in winter and no-cool calls during heat events. Same-day service is available across most NH service areas.
When the repair cost exceeds 50% of replacement cost and the system is more than 10–12 years old, replacement typically offers better long-term economics — especially with the efficiency improvements and available rebates on new systems. We give you an honest, unbiased assessment.
Annual maintenance is the single most effective preventive measure. Change your air filter every 1–3 months. Keep outdoor condenser and heat pump units clear of snow, ice, and debris. Schedule spring AC tune-ups and fall heating tune-ups before peak season demand.
Serving All of New Hampshire
We provide HVAC repair throughout New Hampshire including Manchester, Nashua, Concord, Dover, Portsmouth, and all surrounding communities. See all service areas →