HVAC and Plumbing Service in Chester, NH
Are you looking for reliable HVAC and plumbing company in Chester, NH for your home? We understand that maintaining a comfortable and efficient home environment is crucial. Our team of skilled HVAC and plumbing professionals are here to address all your heating, cooling, and plumbing needs with top-notch service and expertise.
Since 1987, GSMS has been proud to offer local plumbing, heating and air conditioning services to residents of Chester, NH. With over three decades of experience, our family-owned business has built a reputation for excellence, reliability, and outstanding customer service.
Keeping Your Home Comfortable Year-Round with Expert HVAC Service
When it comes to your home’s climate control, we’ve got you covered. Our comprehensive HVAC services ensure that you stay warm in winter and cool in summer.
Boiler Installation and Replacement
Is your old boiler struggling to keep up? Our expert technicians specialize in boiler installation and replacement, ensuring your home stays warm and cozy. We’ll help you choose the right system for your needs and budget, and install it efficiently to minimize disruption to your daily life.
Furnace Installation and Repair
Don’t let a faulty furnace leave you in the cold. Our furnace installation services will equip your home with a reliable heating system. If your existing furnace needs attention, our furnace repair experts can quickly diagnose and fix the issue, restoring warmth to your home.
Heat Pump Solutions
Heat pumps offer an energy-efficient option for both heating and cooling. Whether you need heat pump repair or are considering heat pump installation, our team can guide you through the process and ensure optimal performance.
Air Conditioning Repair Service
When the summer heat hits, a malfunctioning AC can be more than just uncomfortable. Our air conditioning repair service is prompt and thorough, addressing issues before they escalate and keeping your home cool and comfortable.
Mini Split System Cost and Installation
Curious about mini split systems? These versatile units offer targeted climate control and can be a cost-effective solution for many homes. We can provide detailed information on mini split system costs and expert installation services to suit your specific needs.
Chester Plumbing Services
From minor leaks to major installations, our plumbing services cover all aspects of your home’s water systems.
Expert Plumbers 24/7
Our skilled plumbers are equipped to handle a wide range of issues, from fixing leaky faucets to addressing complex pipe problems. We pride ourselves on quick response times and thorough solutions.
Water Heater Repair and Installation
Don’t let a faulty water heater disrupt your daily routine. Our water heater repair services can quickly restore your hot water supply. If it’s time for a new unit, our water heater installation experts will help you choose and install the perfect system for your home.
Ready to Experience Comfort and Peace of Mind?
Don’t let plumbing, heating and cooling issues disrupt your home life! Whether you need a new boiler, a reliable furnace, AC repair or expert plumbing services, our dedicated team is here to help.
Contact us today for a free consultation and discover how we can enhance your home’s comfort and efficiency. Don’t take our word for it, see what your neighbors are saying about our services below!
Call 603-424-8258 now for HVAC and plumbing service in Chester, NH or fill out our online form to schedule your service! Your satisfaction is our priority, and we can’t wait to serve you!
Recent Jobs and Reviews in Amherst, NH
Amherst, NH at a glance
GSMS Air•Heating•Plumbing has completed 25 jobs in Amherst, NH between June 2026 and October 2026.
The 14 customer reviews shown here average 5.0 out of 5.
The most recent job was on October 30, 2026.
GSMS Air•Heating•Plumbing has completed 50 jobs in Amherst, NH in the last 12 months. The first job there was in August 2024.
Our Local Reviews by City
- Amherst, NH (14)
- Atkinson, NH (2)
- Auburn, NH (3)
- Barrington, NH (24)
- Bedford, NH (41)
- Bow, NH (3)
- Candia, NH (3)
- Chester, NH (2)
- Concord, NH (11)
- Deerfield, NH (1)
- Derry, NH (3)
- Dover, NH (1)
- Durham, NH (2)
- Epping, NH (4)
- Exeter, NH (2)
- Gilford, NH (1)
- Gilmanton, NH (4)
- Goffstown, NH (10)
- Greenland, NH (3)
- Hampstead, NH (2)
- Hampton, NH (3)
- Henniker, NH (3)
- Hillsborough, NH (1)
- Hollis, NH (20)
- Hooksett, NH (21)
- Hudson, NH (9)
- Lee, NH (2)
- Litchfield, NH (3)
- Londonderry, NH (17)
- Madbury, NH (1)
- Manchester, NH (78)
- Merrimack, NH (73)
- Milford, NH (9)
- Moultonborough, NH (2)
- Nashua, NH (72)
- New Boston, NH (4)
- Newbury, NH (1)
- Newmarket, NH (3)
- Northfield, NH (2)
- Northwood, NH (2)
- Pembroke, NH (1)
- Raymond, NH (1)
- Rochester, NH (2)
- Salem, NH (4)
- Sandown, NH (3)
- Strafford, NH (1)
- Stratham, NH (15)
- Tilton, NH (1)
- Weare, NH (8)
- Windham, NH (11)
- York, ME (2)
Job Locations and Reviews
Completed the oil boiler maintenance. Everything went great. Please see the attached form.
As always very easy to work with GSMS, professional and timely with no unexpected issues or problems.
.replace blower motor and flame sensor
GSMS was quick to respond to my heater issue and scheduled a technician, Jack. He was very knowledgeable and thorough in diagnosing the problem and explained what he did to resolve it.
New nozzle had issue. I replaced with new. Systrm has poor draft. Reccomend uprising flue to 6".
Oil furnace pm and replace first floor thermostat
Onstall Lennox S40 thermostat. Perform furnace maintenance. I reccomend installing gas low pressure switch and replacing the inducer vent coupling.
Look at ductwork in basement in regards to no air flow out of cieling supply grille. I found that the previous homeowner had taken the duct and connected it to the pellet furnace.
Furnace PM.
Showed up when scheduled and did a thorough inspection with diagnosis of two components in our furnace which would cause trouble down the road.
Furnace PM. Reccomend replacing combustion motor and flame rod.
Following our recent service visit where we discovered high carbon monoxide (CO) readings and had to red-tag your 31-year-old furnace, this proposal outlines the complete modernization of your home's heating and cooling infrastructure. The Hybrid Strategy (Dual-Fuel): We know your primary goal is to be energy-conscious and electrify your home as much as possible. However, based on our load calculations, an electric heat pump alone will not have the capacity to keep up with your home's heat loss on the coldest winter days. To give you the best of both worlds, we have designed a Lennox Hybrid System. This system pairs the top-tier Lennox SLP99 Modulating Gas Furnace with the ultra-efficient Lennox EL21KLV Cold-Climate Heat Pump. The system uses your "Thermal Balance Point" to maximize efficiency: during milder winter weather, it uses the highly efficient electric heat pump. The moment the temperature drops to the point where the heat pump can no longer keep up, the system's "brain" aut
Excellent service and very knowledgeable technician.
Remove toilet and reset
Completed the oil boiler maintenance today. Everything went great. Please see the attached form. I also replaced the air vent that had failed.
Rinnai no HW. Found inlet screen completely plugged. Still producing lukewarm water so I completed a flush on the HX. Hot water back on. Thank you! I reccomend testing water and adding a sediment filter to your home water. This was very premature for the system to be blocked up.
Installed taco leak shut off
I found that the cold water flexible line was leaking. I recommended installing a leak stop valve and hard piping in the cold water inlet.
Trouble shoot HW recirculation line that is pushing HW into CW pipes. We narrowed it down to shower valve upstairs. I also replaced the comdensate pump that wasn't working. Thank you!
Well Water test Comprehensive + radon.
This proposal outlines the replacement of your failed 40-gallon Bradford White power-vented natural gas water heater. Because your tank is currently covered under the manufacturer's warranty, the physical cost of the new tank itself is covered. The pricing in this proposal strictly covers the professional labor, the distributor's warranty processing fee, the necessary structural plumbing modifications, and the required safety code upgrades to properly install the new unit. Scope of Work 1. Demolition & Warranty Processing Removal: We will safely drain, disconnect, and remove your existing failed water heater. Warranty Handling: GSMS will handle the logistics of returning the failed tank and will cover the $100 warranty processing fee charged by the distributor on your behalf. 2. Equipment Installation & Code Upgrades The New Tank: We will supply and install your new warranty-replacement 40-gallon Bradford White power-vented natural gas water heater in the exact same footprint. Conn
Today I assessed the existing water treatment system. Also, I took a comprehensive + radon water test. Once we receive the results from the laboratory, we will report back to you with the results.
Completed the AC maintenance today. Everything went great. Please see the attached form.
Replaced the Lennox TXV valve under warranty. Client paid for labor and new refrigerant. Checked operating pressures and the unit was running perfect. Unit is in perfect operating condition now.
Replaced shower arm
Install new toilet
Install check valves on hot and cold outside faucet
Found that the TXV valve is acting up. Either the screen inside is plugged up or there's an issue with the valve itself. The part is covered under warranty but the labor is not. We will send over the estimate to replace the TXV valve in the next couple of days.
Completed the AC maintenance today. Everything went great! Please see the attached form.
No heat emergency situation handled immediately on a Sunday evening. Great service!
Courteous professional excellent service!
Professional service. These guys are the best. Trusted service provider!
A pleasure to deal with
Jack is always polite and friendly and willing to answer any questions we might have.
Jack is the best of the best
I couldn’t ask for more. In fact I signed up for a regular maintenance program with him
We count ourselves lucky for customers like you and look forward to working with you again in the future!
First time, here.Wonderful guys, great work. See them, next year!
Great
We have used GSMS for years and have always been very pleased with their service!
Love to hear it, Maria!! Thank you for taking the time to shout out our awesome team.
