Air Conditioning Repair and Service

Air Conditioning Repair and Tune-up Services in New Hampshire and Massachusetts

We Can Fix Your Home’s Broken AC System and Provide Preventive Maintenance


A broken or failing air conditioning system can be extremely frustrating because – if not properly maintained – they tend to break down when the weather is scorching. While most air conditioner repairs require an HVAC professional, homeowners can troubleshoot some common home AC problems; and we’ve provided some information below to help you do just that. If you need professional help, just give us a call and we’ll send one of our expert AC technicians to your home to fix it promptly and at a fair price.

It’s also wise to remember that industry best practices call for annual maintenance (and that, to stay current under warranty, manufacturers require it). Fortunately, we also specialize in air conditioner tune-ups to help ensure that your system keeps you cool all summer long.

Common Air Conditioning Problems

Problem: My Air Conditioner Isn’t Cooling Effectively
Potential Causes/Solutions: Possible causes include refrigerant that is low or leaking, thermostat issues, a clogged drain or a dirty filter. You can (and regularly should) change your filter. You can also check to make sure your condensate drain line is not clogged, and check your thermostat to make sure it is set properly and is reading the correct temperature. Issues involving refrigerant are best handled by an HVAC professional.

Problem: My Central AC Isn’t Working at All
Potential Causes/Solutions: First, make sure your thermostat is functioning; the problem could be as simple as a burned-out battery. Also, your outdoor compressor and fan controls could be worn out from turning on and off too frequently. If so, you’ll want to check (or have a professional check) your unit’s electrical connections.

Problem: My Air Conditioner Has Limited Air Flow
Potential Causes/Solutions: Your ducts could be clogged or constricted, or leaking air. Your filter could also be part of the problem, restricting airflow through your system, cutting its efficiency and reducing its ability to cool the air. For central air systems, our technicians check for duct system leakage as part of your periodic maintenance.

Problem: My Energy Bills Are Unusually High
Potential Causes/Solutions: A spike in operating costs most often signals inefficient operation. After a dirty filter, the most likely culprit may be a choked condenser coil. If so, it is probably time for a tune-up.

Frequently Asked Questions

Q: What’s the most important thing I can do to help keep my AC system running smoothly?
A: Change the filter regularly. This helps your cooling system operate at peak levels while improving indoor air quality. The U.S. Department of Energy reports that changing your HVAC filter can lower your air conditioner’s energy consumption by 5% to 15%. High-quality 4-inch-thick filters should be changed every 6-9 months, while cheaper 1-inch filters may need to be replaced every 30 days.

Q: What certifications does an HVAC technician need?
A: HVAC technicians handling controlled refrigerant are required to have Environmental Protection Agency Section 608 certification. State licensing requirements vary greatly, so homeowners can gain added peace of mind by choosing a contractor whose technicians receive advanced training and certification from NATE (North American Technician Excellence) — the nation’s largest nonprofit certification organization for heating, ventilation, air conditioning and refrigeration professionals.

Q: What are some of the signs that my air conditioner may need repairs?
A: Signs that you may need AC service include: leaking around the outside unit, the air coming into the house isn’t cool enough, the unit is short-cycling or constantly turning on and off, higher-than-normal energy bills or excessive noise during start-up and operation.

Q: How long will my AC system last?
A: It varies, of course, but the average is 15-17 years. In some new construction projects where the emphasis is on keeping costs to a minimum, the less-expensive systems chosen may have a shorter lifespan, averaging 11-13 years.

Q: Do I ever need to have my refrigerant “topped off”?
A: No. HVAC systems do not consume the refrigerant as part of the cooling process. If the refrigerant is low, this indicates either that there is a leak or that it was set up improperly.

Q: How does an air conditioner work?
A: Heat is extracted from the home by passing indoor air across a refrigerant coil. Refrigerant lines carry the heat to the outdoor unit, where it is released into the outside air. A fan blows air across the chilled coils into your home. The cooling cycle continues until the indoor temperature reaches the thermostat setting. The process is explained in this video from How Stuff Works. And you can find a more detailed explanation (along with more helpful information and tips) in this Energy Saver 101 infographic from the U.S. Department of Energy.

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Get Your AC Unit Tuned Up for the Summer Months

Your home should be a haven of cool from the discomfort of summer heat and humidity. So scheduling some springtime maintenance is wise. When performing an air conditioning tune-up, our expert HVAC technicians:

  • Check to ensure the correct amount of refrigerant
  • Test for refrigerant leaks using a leak detector
  • Capture any refrigerant that must be evacuated from the system
  • Check for duct leakage in central systems
  • Measure airflow through the evaporator coil
  • Inspect electric terminals, clean and tighten connections, and apply a non-conductive coating if needed
  • Oil motors and check belts for tightness and wear
  • Check the accuracy of the thermostat

Watch the video below to learn some quick tips for maintaining your home’s cooling system.

FAST same day service, upfront pricing and clean, courteous technicians. Air conditioning problems? Lose the wait! Why wait all day for service? Schedule an appointment that’s convenient for you. We’ll show up on time, listen to your needs, diagnose your situation, make recommendations and prepare pricing by the job, not by the hour, so there are no surprises. Our technicians will take great care of your home. They wear shoe covers, put down drop cloths, are trained to perform the work you need and will thoroughly clean up the work area. We follow up with a phone call to be sure you are satisfied. We stand by everything we do.

We’re here to help make your home heating problems go away. Just call Heritage – we’ll get it fixed today 603-668-4438 (NH) | 978-252-4800 (MA).

Our home cooling contractor services are 100% GUARANTEED. We back all our work with a written guarantee. If you’re not satisfied, we will come back and fix the job for FREE.

Heritage offers plumbing, heating, cooling, and electric repair, installation, and maintenance to residences in New Hampshire and Northern Massachusetts. We routinely install, repair, and maintain oil and propane fired furnaces, boilers, hot water heaters, central air conditioning units, Ductless AC units, and mini splits, as well as perform all of the necessary plumbing and electrical repairs, installations, and services you would come to expect from a trusted local plumbing and heating company. We service the needs of residents throughout NH and MA, including those from the New Hampshire areas of Manchester, Concord, Nashua, Salem, Derry, and Portsmouth. We also serve homeowners in northern Massachusetts including Chelmsford, Wakefield, Westford, Winchester, and Woburn. Town not listed? Don’t worry. If your home is within driving distance of these towns and cities, rest assured we have you covered! If you are ready to schedule an appointment, please call 603-668-4438 (NH) | 978-252-4800 (MA) or click here to schedule online. Problem solved!