While New Hampshire winters dominate most homeowners' attention, summer comfort matters too — and NH summers have become noticeably hotter and more humid in recent decades. When your air conditioning system fails on a 95°F July day, you need fast, reliable service from technicians who know NH cooling systems inside and out. Plumbing HVAC Services New Hampshire provides complete air conditioning services throughout the Granite State.
AC Services We Offer in New Hampshire
Common AC Problems in NH Homes
AC Not Cooling Enough
If your AC is running but not cooling effectively, the most common culprits are low refrigerant (indicating a leak), a dirty evaporator or condenser coil, a failing compressor, or an undersized system for the space being cooled. We diagnose with precision — not guesswork — using refrigerant gauges, thermal imaging, and amp draw testing.
AC Not Turning On
A system that won't start is often caused by a tripped breaker, blown fuse, failed capacitor (one of the most common AC repairs), bad contactor, or thermostat failure. Capacitor and contactor replacements are quick, affordable repairs that restore function the same day.
AC Freezing Up
Ice forming on the evaporator coil or refrigerant lines indicates restricted airflow (usually a dirty filter or blocked return), low refrigerant, or a failing blower motor. If your AC is frozen, turn it off and let it thaw completely before calling us — running a frozen AC risks compressor damage.
Unusual Noises from AC
Banging or clanking indicates loose or broken components. Squealing often points to a worn fan belt or bearing. Clicking at startup/shutdown is normal; continuous clicking suggests a relay or control board issue. Hissing may indicate a refrigerant leak. Any unusual sound warrants prompt diagnosis before minor issues become major failures.
Poor Humidity Control
NH summers can be quite humid, and air conditioning provides significant dehumidification. If your home feels clammy even with the AC running, possible causes include an oversized system (short-cycling before removing humidity), a dirty evaporator coil, or low refrigerant. A properly sized, properly maintained AC should keep indoor humidity below 60% during NH's humid months.
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Licensed NH technicians available 24/7. Same-day appointments available.
📞 (603) 555-0100AC Tune-Up & Preventive Maintenance
Annual AC tune-ups performed in spring — before the cooling season — are the single most cost-effective thing you can do for your air conditioning system. A comprehensive tune-up includes:
- Inspection and cleaning of evaporator and condenser coils
- Refrigerant level check and leak test
- Capacitor and contactor testing
- Blower motor inspection and lubrication
- Thermostat calibration and control board check
- Filter replacement (or inspection)
- Condensate drain clearing
- Safety control testing
- Ductwork inspection for leaks
Properly maintained AC systems last 5–8 years longer than neglected ones and operate 15–20% more efficiently throughout their service life.
AC FAQs
Minor repairs like capacitor or contactor replacement run $150–$350. Refrigerant recharge is $200–$500 depending on system size and refrigerant type. Major repairs like compressor replacement cost $800–$2,000+. We always provide a written estimate before work begins.
The general rule: if repair cost exceeds 50% of replacement cost and the unit is over 10 years old, replacement is usually the better investment. We provide honest guidance — we'll tell you when a repair makes economic sense and when it doesn't.
Yes. We service all major mini-split brands including Mitsubishi, Daikin, Fujitsu, LG, Samsung, and others. We're equipped with the diagnostic tools and refrigerant handling equipment for these systems.
Annual spring tune-ups are recommended. Replace or clean your filter every 1–3 months during the cooling season. Have your system inspected if you notice any changes in performance, unusual sounds, or increased energy bills.
Systems installed before 2010 likely use R-22 (Freon), which has been phased out and is now very expensive. Systems 2010–2020 typically use R-410A. Newer systems use R-32 or R-454B. We handle all refrigerant types and can advise on cost implications of servicing older R-22 systems.
Serving All of New Hampshire
We provide AC services throughout New Hampshire including Manchester, Nashua, Concord, Dover, Portsmouth, and all surrounding communities. See all service areas →