Gas Furnace Service, Repair & Maintenance

Professional Gas Furnace Repairs, Service and Maintenance in NH and MA

Keep Your System Running Safely and Efficiently with Gas Furnace Maintenance

Your gas furnace keeps you warm and cozy all winter, until one day … brrrrr! Fortunately, you can always count on our five-star technicians to perform timely, professional gas furnace repairs to get your heat flowing again. We also specialize in performing the high-quality gas furnace service and maintenance that you need to guard against any unexpected breakdowns.

Annual gas furnace maintenance also keeps you and your family safer and can help you save money by ensuring that your system runs at peak efficiency. Because we believe part of our job is to educate homeowners about their heating systems, listed below is some helpful information about common gas furnace problems along with the answers to some frequently asked questions.

Of course, our expert technicians also specialize in:

HVAC problems solved in 2016

Needing gas furnace repairs in the middle of winter can be a huge hassle. At Heritage, we are here to help fix this inconvenience in a timely, professional, and friendly manner. Our trained technicians will enter your home in a clean and courteous manner and will leave their workspace spotless when they leave.

There are a few different reasons why your gas furnace might be due for a repair. The most obvious sign of a faulty furnace is lack of heat. If your furnace is not producing any heat, it could be due to a broken thermostat, circuit breaker, gas valve, pilot light, and more. Our technicians will diagnose the issue and resolve it quickly.

Perhaps your gas furnace is producing heat, but just not as much of it as it should. In this case, you might have a dirty filter, the air chamber might be blocked, or the burner may need to be readjusted. Some of these issues can also cause your furnace to operate sporadically or to not shut off.

Common Gas Furnace Problems Gas Furnace Service

Problem: No heat
Potential Causes/Solutions: If you have a digital thermostat, check to make sure the visual display is functioning because if it isn’t you may be able to resolve your issue by simply replacing the battery. Also make sure the device is set to “heat” and that all other settings appear to be correct. The problem could also be related to your circuit breaker, the gas valve, pilot light (in older systems) and more.

Problem: Insufficient heat
Potential Causes/Solutions: If your gas furnace is producing heat, but just not as much as it should, the issue could involve a dirty filter, a blocked air chamber or a burner in need of readjustment. Some of these issues can also cause your furnace to operate sporadically or to not shut off. For more insight on potential causes and possible solutions to gas furnace problems, here’s a troubleshooting guide from home improvement expert Bob Vila.

Problem: Damaged heat exchanger
Explanation: Hot air generated during the combustion process passes through a critical component called the heat exchanger, which warms the air being circulated back into your home. It also keeps the gases created during combustion separate from your breathing air. When it becomes cracked or damaged, it affects not only your gas furnace’s ability to keep you warm, it can also increase the risk of exposure to potentially deadly carbon monoxide (CO). The risk of carbon monoxide exposure is higher in a house with a gas heating system, so we recommend safeguarding your home with a CO monitor.

There are many different causes of heat exchanger malfunction or failure, including normal wear and tear. That’s why it’s important to have regular gas furnace maintenance each year. If there’s any sign of damage, our technicians can quickly diagnose the problem and clearly spell out your options.

Frequently Asked Questions

Why do I need professional annual maintenance for my gas furnace?
A: In addition to making sure your heat exchanger is in good shape, annual gas furnace maintenance helps prevent breakdowns and keeps your system running safely and efficiently (saving you money on fuel costs). Plus, getting annual maintenance is not just our recommendation, most manufacturers require it in order to stay in compliance with the terms of your warranty.

Q: What type of training is needed for technicians to work on gas furnace equipment?
A: One of the most important things to know about Heritage is that training for our gas furnace specialists, and for all of our technicians, goes far beyond applicable state or governmental requirements. Distinct from our competitors, we operate a state-of-the-art training center where our technicians receive up to 150 hours of specialized, hands-on training every year.

Regarding training requirements within our coverage area:

  • New Hampshire has strict licensure requirements for any individuals installing, modifying or repairing gas-fired equipment.
  • In Massachusetts, a gas license is not required to perform maintenance and most service work, but it is required when installing or changing gas piping or when installing or altering the venting.

This means that in both states, Heritage technicians receive significantly more comprehensive training than our competitors.

Q: If my heat exchanger needs to be replaced, does it make more sense to get a new gas furnace?
A: For safety purposes, both New Hampshire and Massachusetts require that a failed heat exchanger be shut down until either the heat exchanger or the entire system is replaced. However, replacing the heat exchanger can cost several thousand dollars. Depending on the age and condition of your gas furnace system, this can be a bit like putting a new engine in a car with 150,000-200,000 miles on it, so each system must be evaluated on a case-by-case basis. The good news is that our experienced technicians will always keep you in the know about what they discover, what your options are and how much any needed gas furnace repairs will cost.

Q: How do I know the heating technician is really looking after my best interests?
A: The responsibility of being invited into your home to repair or maintain your gas furnace heating system is one that we take extremely seriously. We thoroughly vet and train every technician to approach each service call with the utmost professionalism, courteousness and care. You can also be certain that our technicians will be friendly, straightforward and helpful when it comes to explaining their findings so you can fully understand the issue and get honest answers to all of your questions.

Q: Are there any key gas furnace maintenance procedures I can do at home?
A: Apart from making sure to schedule annual gas furnace maintenance, it is important to regularly replace your air filter — a relatively simple process even for homeowners who are not mechanically inclined.

For more information about furnaces and boilers, check out this informational page from the U.S. Department of Energy and this infographic.

As always, please don’t hesitate to contact us to schedule a repair or to talk more about the importance of getting regular maintenance for your gas furnace heating system!

In addition to noticing that your furnace isn’t turning on or off properly, you may also detect an unusual noise. This is often a sign of a broken belt or motor. You may also identify a strange smell. These can be signs that you need immediate gas furnace repairs. If this is the case, just call Heritage! Our trained technicians are ready to help.

Even if you are not in need of a specific repair, it is important to have your furnace checked before every cold season. Our gas furnace maintenance service ensures that your heating system is working properly and performing at its best.

We repair a variety of heating system brands including:Gas Furnace Repair

  • Goodman
  • Amana
  • Rheem
  • Rinnai
  • Mitsubishi
  • Burnham
  • Miller
  • Bryant
  • Bard

We offer home gas furnace maintenance and repair services in New Hampshire and Northern Massachusetts. Contact us to schedule an appointment that’s convenient for you.


New Hampshire Office
28 Commercial Ct, Auburn, NH 03032
NH LIC #2490C - NH ELC 0316C

Massachusetts Office
2550 Main St, Tewksbury, MA 01876
MA LIC #15719 - MA ELC 1190 - MA SM LIC #524

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