HVAC & Plumbing Repair, Installation & Maintenance in Manchester, NH
GSMS has been Manchester, NH's trusted provider for air conditioning, heating and plumbingservices since 1987. Our licensed and insured cooling, heating and plumbing technicians deliver top-notch installations, repairs, and maintenance, ensuring your home's comfort and safety year-round.
We specialize in energy-efficient solutions, including heat pumps, mini-splits, and smart thermostats, tailored to meet the unique needs of Manchester residents.
Ready to experience 5 Star Plumbing, Heating and AC services near you?
Contact GSMS online or call 603-424-8258 today for a free estimate.

HVAC & Plumbing Service FAQs
One of the most common reasons your AC unit might stop working is a failed capacitor near Manchester. Especially the start capacitor, which is essential for getting your system up and running. Clogged air filters can choke airflow, refrigerant leaks can sabotage cooling efficiency, and drainage problems can cause water damage or system failure.
HVAC systems are machines that demand specialized tools and parts for proper repairs. These components don’t come cheap, especially when they must be ordered from specific manufacturers or hard-to-find suppliers.
If you're planning to install a new HVAC system in the Manchester area, you can expect to invest anywhere from $5,500 to $15,000. Your overall cost will be shaped by important factors like they type of unit you choose, the unit’s cooling capacity, its energy efficiency rating, the condition of your current ductwork, and any upgrades you choose to include.
The cost to replace a water heater typically ranges from $850 to $4,500 near Manchester. Whether you choose a traditional tank or a tankless model, the unit's size, and how complex the installation is will depend how much it cost.
Air Conditioning Repair and Installation Service
- AC Repair: Our expert technicians provide quick and reliable air conditioning repairs. We handle all types of AC unit issues, and can fix anything from refrigerant leaks to malfunctioning compressors.
- AC Replacement: If your current cooling unit is outdated or beyond repair, we’ll help you choose the right system for your home, ensuring optimal performance and energy efficiency for your home.
Boiler Installation and Replacement Service in Manchester
If your boiler is on its last leg or you're tired of dealing with constant breakdowns, it’s time for an upgrade. A new, Energy Kinetics boiler doesn’t just keep your Manchester area home warm, it saves you money on energy bills and provides reliable heat when you need it most.
What to Expect During Your Boiler Installation
We know that replacing your boiler might sound like a big job, but we handle everything from start to finish so you don’t have to worry about a thing.
Here’s how it works:
- Free Consultation & Quote: One of our certified technicians will assess your current heating system, discuss your needs, and provide a transparent quote with no hidden fees.
- Safe Removal of Your Old Boiler: We disconnect and remove your existing boiler, ensuring all gas and water lines are safely handled. If any upgrades are needed for better efficiency, we’ll let you know upfront.
- Professional Installation: Our team installs your new boiler, making sure everything is set up correctly, safely, and efficiently. We also test the system to ensure it’s running at peak performance.
- Cleanup & Final Walkthrough: We respect your home, so we clean up after ourselves and take away your old boiler. Before we leave, we’ll walk you through your new system and answer any questions.
Need a New Boiler? We Make Installation Easy and Hassle-Free
Our professional boiler installation and replacement services make the process simple and stress-free, so you can enjoy a warm, comfortable home without the hassle.
Local Furnace Installation and Repair Service in Manchester
Is your furnace struggling to keep up with the cold? Whether you need a brand-new system or emergency repairs, we’ve got you covered. A properly installed, high-efficiency furnace not only keeps your home warm but also saves you money on energy bills. Our expert team makes the entire process easy, so you can enjoy a cozy, comfortable home without the stress.
Choosing the Right Furnace for Your Home
Not all furnaces are the same, and choosing the right one makes a big difference. We help homeowners find the best fit based on home size, heating needs, and budget.
Here are the main types:
- Gas Furnaces – The most common and cost-effective option, offering powerful heating and efficiency.
- Electric Furnaces – A great alternative for homes without gas lines, providing clean and reliable heat.
- Oil Furnaces – A good option for homes in colder climates that don’t have natural gas access.
- High-Efficiency Models – Advanced systems that maximize energy savings and performance.
If you’re not sure which system is the type you need, our team will walk you through your options and recommend the ideal choice for your home.
Ductless Mini Split Installation
- Mini-Split Heat Pumps: Our team installs and services mini-split heat pumps, providing efficient heating and cooling solutions for homes without ductwork.
- Mitsubishi Mini-Splits: We are experienced in installing and maintaining Mitsubishi mini-splits, ensuring your home benefits from the latest in ductless technology.
Plumbing Service in Manchester
From leaky faucets to full-scale pipe replacements, we handle it all. Our expert plumbers provide fast, reliable service to keep your home's plumbing running smoothly. Whether you need an urgent repair, a fixture upgrade, or a complete repiping, we’re here to help with top-quality workmanship and upfront pricing. No surprises! Just expert service you can trust.
We understand the importance of reliable and efficient plumbing in maintaining a comfortable home. Our skilled plumbers are dedicated to delivering great service because it's in our DNA!
Water Heater Replacement, Repair and Tankless Water Heater Installation
If you're tired of running out of hot water or looking for a more energy-efficient way to heat your home's water, a tankless water heater could be the perfect solution. GSMS offers professional tankless water heater installation, repair, and maintenance services in Manchester. Whether you're upgrading your system or need a quick repair, we're here to help.
Common Issue We Fix
If you notice these things happening with your water heater, give us a call!
- No Hot Water: Diagnosing and fixing issues that cause a lack of hot water.
- Leaking Tank: Repairing leaks to prevent water damage and ensure efficient operation.
- Strange Noises: Addressing unusual sounds from your water heater, which could indicate sediment buildup or other problems.
- Inconsistent Temperature: Resolving issues that lead to fluctuating water temperatures.
Upgrading to a tankless water heater is a smart investment, but it's important to get the right size and model for your home's needs. Our experts will assess your hot water usage and recommend the best system to keep your household comfortable. We install top brands like Rinnai, ensuring you get reliable performance and maximum energy savings.
Kitchen and Bathroom Plumbing Solutions
- Faucet and Sink Installation: Installing new faucets and sinks to enhance your kitchen and bathroom.
- Dishwasher and Garbage Disposal Installation: Ensuring your kitchen appliances are properly connected and functioning efficiently.
- Toilet Repair and Installation: Fixing leaks, unclogging blockages, and installing new toilets.
- Shower and Tub Services: Repairing leaks, replacing fixtures, and installing new showers and bathtubs.
- Pipe Repair and Replacement: Addressing leaks and damaged pipes to prevent water damage and maintain optimal plumbing performance.
Get the Best Local Plumbing, Heating and Air Experts near Manchester, NH
When it comes to maintaining a comfortable and efficient home, GSMS is your trusted local expert. With over three decades of experience, our family-owned business has built a reputation for delivering top-quality HVAC service tailored to the unique needs of homeowners in the area.
Need a quick repair, total replacement, or maintenance for your HVAC or Plumbing system? Call 603-424-8258 today!
Recent Jobs and Reviews in Manchester, NH
Customers say: The recent reviews exhibit a predominantly positive sentiment, with recurring themes of satisfaction, professionalism, and expertise. Customers express gratitude, recommend the company, and acknowledge the quality of the work performed. Positive reviews frequently mention friendly and knowledgeable technicians, timely responses, and efficient service. Negative reviews are minimal and do not represent a clear, recurring trend. Overall, the reviews suggest a positive experience with the company, with many customers expressing satisfaction with their HVAC and plumbing needs.
Our Local Reviews by City
- Amherst, NH (10)
- Atkinson, NH (2)
- Auburn, NH (1)
- Barrington, NH (22)
- Bedford, NH (28)
- Candia, NH (2)
- Chester, NH (2)
- Concord, NH (7)
- Deerfield, NH (1)
- Derry, NH (3)
- Dover, NH (1)
- Durham, NH (2)
- Epping, NH (1)
- Gilford, NH (1)
- Gilmanton, NH (1)
- Goffstown, NH (8)
- Greenland, NH (2)
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- Henniker, NH (3)
- Hillsborough, NH (1)
- Hollis, NH (17)
- Hooksett, NH (16)
- Hudson, NH (7)
- Lee, NH (1)
- Litchfield, NH (3)
- Londonderry, NH (14)
- Manchester, NH (60)
- Merrimack, NH (52)
- Milford, NH (8)
- Moultonborough, NH (1)
- Nashua, NH (58)
- New Boston, NH (4)
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- York, ME (1)
Job Locations and Reviews
Always GREAT service
Replaced the circulator flanges and seals. Purged all the air out of the system. Returns came back hot. Make sure there was no leaks as well.
Replaced leaking hy vent and leaking pressure relief valve. Bled the air out of the system. Return came back hot.
We will safely replace your existing 40-gallon electric water heater with a brand-new, direct replacement unit in the same location. This installation includes complete code compliance for the city of Manchester, as well as a leak detection and shut-off system to protect your home. Scope of Work: Removal & Disposal: Safely drain, disconnect, and remove the existing 40-gallon electric water heater. Plumbing Modification: Cut out and remove the existing sediment filter on the water line. Because your home is on municipal city water, this filter is unnecessary; removing it will streamline your plumbing and eliminate a potential maintenance headache. New Tank Installation: Provide and install a new 40-gallon electric water heater in the existing location. Code & Performance Upgrades: Provide and install all new essential components to meet current Manchester plumbing codes and extend the life of the tank. This includes a new thermal expansion tank, a thermostatic mixing valve, and a v
Completed the maintenance on the gas boiler. Started off with checking electrical connections and everything looked good. I vacuumed out the burner box and the burner tubes. I checked all the boiler accessories and I found that the pressure relief valve was leaking and the high vent was leaking water. I checked incoming and outgoing gas pressures and those were according to manufacturer specifications. Lastly I ran the boiler and performed a combustion analyzer test. This checks the unit CO, CO2 and oxygen levels. The boiler was running good. I will send over an estimate for those repairs. This unit is from 1978.
Completed the boiler maintenance today. I started off with checking the wiring connections and everything looked good. I vacuumed out the burner box and the burner tubes. I checked all the boiler accessories and everything looked good. The only thing I notice was that the circulator pump is leaking water from the flange so I will send over an estimate to replace that. I checked incoming and outgoing gas pressures and those were according to manufacturer specifications. Lastly I ran the boiler and performed a combustion analyzer test that checks the unit CO, CO2 and oxygen levels. The boiler was running good. The boiler is from 1975-1977.
N/A
Replacement of the existing tank-style water heater. Install a 40-gallon indirect tank as a new zone off the existing boiler. The boiler was prepiped and set up to allow for this plan in the future.
Add in a pressure reducing valve.
Water heater isn't keeping up. Client wanted the water heater replaced.
I started off with doing the maintenance on the Rinnai floor heater. I vacuumed the air filters. I vacuumed out the whole inside of the unit and the blower wheels. I checked all the electrical connections and everything looked good. I checked all the vent pipe connections for carbon monoxide leaks and there was none. I used an electronic sniffer on the gas lines and there is no leaks as well. The bathroom fan was extremely dirty so there was poor air flow. I took it all apart and cleaned it. It was a night and day difference with the amount of suction now. Lastly I took a look at the water heater and the date says it was manufactured in September of 2005. There is a water filter that filters the water before the tank and it is extremely dirty. I would highly recommend replacing the tank due to the age because if that tank was to fail there would be 40 plus gallons of water all over the floor and the ceiling below.
To permanently resolve the leak and ensure safe, consistent water temperatures, we recommend a complete internal rebuild of the shower valve using genuine OEM Kohler replacement parts. We do not recommend a "partial" repair, as disturbing the old, hardened O-rings on the secondary components will likely cause new leaks behind the finished wall.
I reccomend replacing water tank due to high TDS on hit water, yellow color, and anode rod being completely gone.
Completed the plumbing maintenance today. I started off with flushing the water tank. I labeled a few emergency shut offs. I inspected the drain pipes downstairs and the client was saying that there was a leak at some point. The area was still a little wet and I believe it is sewage. I told her that we can come out and take a look and she said that she would let us know.
Replace old moen single handle shower cartridge.
Fantastic service
Qwentin is awesome, very knowledgeable and an overall good guy
Qwentin is a pleasure to have work at our house. He is friendly, informative, and clearly knows what he is doing.
All was great.
Excellent work
Great service!
Excellent service!
👍
Home club member. Always great customer service from scheduling staff to HVAC technicians. Today, received maintenance furnace service from Qwentin Gauvin. Trustworthy, genuine and service oriented technician. Appreciate his efforts.
Service
Excellent Service!
Qwentin serviced our furnace and installed our new Nest unit. He was friendly, attentive and thorough
Only great service from Jack with GSMS. Longtime customer!
Great service!
