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AC Repair in Dover, NH: outdoor air conditioner condensers beside a two-story home

AC Repair in Dover, NH

Complete AC Repair From Diagnosis to Done

From swollen capacitors to refrigerant leaks and frozen evaporator coils, we find the real fault and fix it right the first time.

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Our technicians who handle AC Repair in Dover, NH
Serving Dover

Trusted Local Experts in Dover

Time matters when the AC is down or the heat is out. Dover HVAC provides Dover homes and businesses with fast, thorough service backed by experienced technicians and fully stocked service vehicles.

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An outside unit that hums while the fan stays still is the call we get most in July in Dover, NH, and the cause is usually a failed run capacitor. That inexpensive component starts the compressor and fan, fades for years without complaint, and then quits under peak load. It is far from the only suspect, though. Contactors pit and stop passing clean power, condenser fan bearings dry out, small refrigerant leaks drain away cooling capacity, and evaporator coils ice over when a clogged filter strangles airflow.

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When the heat goes out, see Furnace Repair.

Warning Signs for AC Repair

The sooner you notice these red flags, the easier and cheaper the fix. Watch for these telltale signs:

  • Rapid on-off cycling that never brings the temperature down
  • Room-temperature air from the registers even though the AC is running
  • Rising electric costs paired with a sticky, uncomfortable house
  • A hot electrical smell or a tripped breaker whenever the air conditioner kicks on
  • Hissing or bubbling sounds that suggest a refrigerant leak
  • Puddles near the air handler or water stains on the ceiling beneath it
  • The outdoor unit humming or clicking but the fan not spinning
  • Ice on the refrigerant lines or a frozen indoor coil

Act Before It Gets Worse

What seems like a minor issue today can take out a compressor or heat exchanger tomorrow. At the first hint of a problem, call (351) 345-9323 for a fast inspection.

Technician holding a new run capacitor beside an outdoor AC unit in Dover, NH
A weak run capacitor is the most common reason an outdoor unit hums but will not start.
The Details

AC Repair, Done Properly

Warm air from the vents can mean a failed capacitor, a refrigerant leak, a frozen coil, or a duct problem, and each one carries a very different price to fix. That is why Dover HVAC tests before touching anything. We meter capacitors against their microfarad rating, compare compressor and fan amp draws to the data plate, judge the refrigerant charge by superheat and subcooling instead of pressure alone, and inspect the coil, blower wheel, and filter whenever there is ice. Adding refrigerant without locating the leak only buys cold air until the charge leaks out again.

Honest advice is part of every visit. If an aging system's compressor has failed, we explain the repair-versus-replacement math plainly and let you decide. Most of the time, though, the fix is simpler, and because our trucks stock capacitors, contactors, fan motors, hard-start kits, and condensate pumps, cooling is usually restored before we leave. We work on central air, heat pumps, and ductless mini splits from all major brands. Need AC repair in Dover? Call (351) 345-9323 and an experienced technician will be on the way.

Pricing

How Much Does AC Repair Cost in Dover?

For most Dover homeowners, an AC repair comes in somewhere between $150 and $650. The part that failed drives the price: a capacitor is a quick, inexpensive fix, while a coil or compressor is a major repair. Every repair starts with a diagnosis and a clear, upfront price.

Factors That Change the Price

  • The age of the system and whether parts are still readily available
  • Refrigerant type, because R-22 recharges are much more expensive
  • Timing, such as same-day or after-hours service versus a scheduled visit
  • How hard the equipment is to reach, such as attics, crawlspaces, or rooftops

If a repair would cost more than a third of a new system, or your AC is past 12 to 15 years old, we'll show you both numbers side by side so you can decide. Call (351) 345-9323 for a quote.

RepairTypical costWhat it usually means
Capacitor replacementThe most common AC failure; outdoor unit hums but won't start$150–$400The most common AC failure; outdoor unit hums but won't start
Contactor replacementWorn relay that stops the condenser from starting$150–$350Worn relay that stops the condenser from starting
Condenser fan motorFan won't spin, unit overheats and shuts down$300–$700Outdoor fan stops, compressor trips on high heat
Refrigerant leak repair + rechargeVaries with where the leak is and how much charge is lost$300–$1,500Depends on leak location and refrigerant type
Evaporator coil replacementCorroded or leaking indoor coil$1,000–$2,500Corroded or leaking indoor coil
Compressor replacementLargest single repair; often weighed against a new system$1,500–$3,000Largest single repair; often weighed against a new system

Typical ranges for common repairs. Your exact price is quoted after diagnosis.

How It Works

What to Expect From Our AC Repair

We follow a proven process to ensure every repair and installation is completed to the highest standards.

1

System Diagnosis

Capacitors, the contactor, motors, and amp draws are all measured, the charge is evaluated through superheat and subcooling, and the coil, filter, and drain are inspected so the real failure is found.

2

Honest Findings & Quote

You get a plain explanation of the fault and its cause, plus a firm price, before we start. When a failed compressor or coil makes replacement the smarter move, we show you the numbers.

3

Repair From a Stocked Truck

Since the common summer failures, like capacitors, contactors, and fan motors, are stocked on the truck, most AC repairs are wrapped up during the first visit.

4

Test Under Load

The repair is proven, not assumed. We watch a full cooling cycle, confirm the temperature drop across the coil, verify amp draws and charge, and make sure the condensate line is clear.

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FAQ

Your AC Repair Questions Answered

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The usual causes are a low refrigerant charge from a leak, a frozen evaporator coil, a failed outdoor fan or compressor capacitor, or return air bypassing the coil through duct leaks. Each has a different fix and a different cost, which is why we test before we touch anything. Call (351) 345-9323 and we will find it fast in Dover.
Ice means the evaporator coil is running below freezing, either because airflow collapsed, usually a clogged filter, dirty coil, or failing blower, or because the refrigerant charge is low. Running it frozen risks the compressor. Shut the system off, let it thaw, and call (351) 345-9323 so we can fix the cause, not the symptom.
If the fault is a capacitor, contactor, motor, or drain issue, repair is usually the smart move at any age. If the compressor or evaporator coil has failed on a system past the twelve-year mark, replacement often wins, especially since older R-410A and R-22 systems cost more to keep charged. We show you the honest math. Call (351) 345-9323 for straight answers.
Most calls are handled the same day. Since the majority of summer breakdowns come down to capacitors, contactors, or fan motors, and we keep all of them on the truck, the repair is usually finished in one trip. Call (351) 345-9323 to get a technician on the way in Dover.
Why It Matters

The Benefits of Professional AC Repair

Start with the refrigerant. It lives in a sealed, pressurized loop, venting it is prohibited under federal rules, and correct service requires gauges, a vacuum pump, and a recovery machine rather than a store-bought recharge kit. Add capacitors that hold a dangerous charge with the power off and a condensing unit fed by 240 volts, and the risks add up quickly. Then there are the diagnostic traps: an iced coil often points to poor airflow rather than low charge, and topping off a system with an unrepaired leak lets moisture and acid slowly damage the compressor while your money escapes with the refrigerant.

What you get from a pro is a repair that holds. Our experienced technicians find leaks with dye and electronic detectors, base every charge decision on superheat and subcooling, test electrical parts with a meter before condemning them, and measure static pressure and inspect the blower and filter whenever airflow is in question. Parts-cannon fixes tend to bring you back in a few weeks. Ours are built to last through the heat. And if the numbers say replacement is the better call, we show you those numbers honestly, without pressure.

DIY vs. Professional AC Repair

Online tutorials may help in a pinch, yet lasting repairs and code-compliant installs depend on trained technicians.

FactorDIY AttemptProfessional Service
Refrigerant Leaks Adding refrigerant while it keeps leaking Leak repaired and correct charge restored by weight
Electrical Safety Stored capacitor charge and live 240V Capacitors drained, power confirmed off
Iced Coils Same ice, again and again Root cause found: airflow or charge
Troubleshooting Guesswork on faults that look the same Instrument readings, not hunches
Replacement Parts Whatever capacitor or motor fits Correct ratings for your exact unit
Outcome Short-lived relief Repair verified under real load
Outdoor AC condenser with trimmed shrubs set well back at a home in Dover
Homeowner Tips

AC Repair Prevention Tips

A few simple habits now, like regular filter changes and seasonal tune-ups, can add years to your system's life. Follow these tips from our experienced technicians:

  • Pay attention to buzzing or clicking when the AC starts, a common warning of a failing capacitor
  • Schedule a spring tune-up so weak parts are caught before summer arrives
  • Keep supply and return vents open; closing rooms raises static pressure on the blower
  • Shade helps, but never enclose the outdoor unit; it needs free airflow on all sides
  • Replace the filter every month in summer, since restricted airflow is the top cause of frozen coils
  • Flush the condensate drain line with the season's first use to head off clogs
  • Keep shrubs two feet from the outdoor unit and gently rinse its coil each spring

Get AC Repair Help Today

Get your comfort back before a small fault becomes a full breakdown.

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Areas We Serve for AC Repair

Wherever you are in the area, the same experienced team handles your AC repair. Find your community below.

Dover Nashua Manchester Portsmouth

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The Dover HVAC Difference

The Dover HVAC Promise

Every AC repair job we complete reflects our commitment to quality and customer satisfaction.

Honest, Upfront Pricing

You get a clear, written quote before any work begins, no hidden fees and no high-pressure upsells, just a fair price for the job.

Done Safely, Done Right

HVAC systems combine gas, refrigerant, and high-voltage electricity. Our technicians follow code on every connection, from gas lines to disconnects, and test everything before we leave.

Rooted in Dover

Being a family-run business in Dover means our reputation rides on every job, so we never cut corners.

Fixed Right the First Time

We dig deeper than the symptom, from error codes to static pressure, so your comfort stays reliable long after we leave.

★★★★★ Rated 4.8/5 by Dover homeowners  ·  Upfront Pricing  ·  Fast Response  ·  All Brands Serviced

Schedule Your AC Repair Today

A struggling HVAC system rarely fixes itself. Reach out to Dover HVAC and we'll handle it before it fails completely.

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