Heating, Cooling & Plumbing in Deerfield, NH
From summer days at Pawtuckaway State Park to chilly nights after the Deerfield Fair, homeowners here know New England weather can be unpredictable. GSMS is just a short drive away and ready to keep your home prepared year-round with professional heating, cooling, and plumbing services.
Whether it’s an emergency breakdown or routine maintenance, our team has the experience and equipment to get the job done right. Call 603-424-8258 or contact us today to schedule service in Deerfield.
Heating Services in Deerfield, NH
When winter sets in, you need a heating system that can handle freezing temperatures. GSMS helps with:
Furnace Services
- Fast repairs when your furnace stops working
- Replacement options to improve comfort and efficiency
- Installation of modern, energy-saving models
Boilers
- Routine boiler tune-ups to extend system life
- Expert repairs to restore heat quickly
- High-efficiency boiler installations for reliable comfort
Heat Pumps
- Year-round heating and cooling in one system
- Maintenance and repairs to maximize efficiency
- Professional installation for homes looking to switch to modern comfort solutions
Air Conditioning Services in Deerfield
Summer humidity can make your home uncomfortable fast. GSMS provides:
- Central air conditioning repair, replacement, and new installation
- Ductless mini-splits for homes without ductwork or for targeted cooling
- Preventative maintenance to lower energy costs and reduce breakdowns
- Indoor air quality solutions, from dehumidifiers to whole-home filters
Plumbing Services in Deerfield, NH
Your home’s plumbing system should be reliable day in and day out. From everyday fixes to bigger repairs, GSMS offers full-service plumbing care for Deerfield homeowners:
- Water Heater Services – Repair, replace, or upgrade to tankless water heaters for on-demand hot water.
- Drain Cleaning & Hydro-Jetting – Clear blockages caused by grease, tree roots, and buildup.
- Sewer Line Services – Camera inspections to pinpoint problems, plus repair and replacement options.
- Fixture Installation & Upgrades – Modern faucets, sinks, showers, and toilets for style and efficiency.
- Pipe Repair & Replacement – Solutions for leaks, bursts, and aging pipes to protect your home.
- Water Filtration Systems – Whole-home and under-sink options for cleaner, better-tasting water.
- Preventative Plumbing Maintenance – Routine inspections to catch small issues before they turn into costly repairs.
Your Trusted Local Choice in Deerfield, NH
Since 1987, GSMS has been family-owned and committed to helping New England homeowners protect their comfort. Deerfield families rely on us for expert workmanship, honest advice, and solutions that are built to last. As a Lennox Premier Dealer, we offer the latest high-efficiency equipment, backed by 24/7 emergency service when you need it most.
Join our Home Club Membership to save on maintenance and repairs while enjoying peace of mind year-round.
Ready to get started? Call GSMS at 603-424-8258 or request service online today.
Recent Jobs and Reviews in Deerfield, NH
Our Local Reviews by City
- Amherst, NH (9)
- Atkinson, NH (2)
- Auburn, NH (1)
- Barrington, NH (20)
- Bedford, NH (26)
- Candia, NH (2)
- Chester, NH (2)
- Concord, NH (6)
- Deerfield, NH (1)
- Derry, NH (2)
- Dover, NH (1)
- Durham, NH (2)
- Epping, NH (1)
- Gilford, NH (1)
- Gilmanton, NH (1)
- Goffstown, NH (6)
- Greenland, NH (2)
- Hampstead, NH (2)
- Henniker, NH (3)
- Hillsborough, NH (1)
- Hollis, NH (11)
- Hooksett, NH (11)
- Hudson, NH (6)
- Lee, NH (1)
- Litchfield, NH (2)
- Londonderry, NH (12)
- Manchester, NH (42)
- Merrimack, NH (28)
- Milford, NH (6)
- Moultonborough, NH (1)
- Nashua, NH (38)
- New Boston, NH (3)
- Newbury, NH (1)
- Newmarket, NH (2)
- Northfield, NH (1)
- Northwood, NH (1)
- Pembroke, NH (1)
- Raymond, NH (1)
- Rochester, NH (2)
- Salem, NH (3)
- Sandown, NH (2)
- Stratham, NH (3)
- Tilton, NH (1)
- Weare, NH (5)
- Windham, NH (7)
- York, ME (1)
Job Locations and Reviews
Great service. Very knowledgeable. Great price.
AC maintenance today. Went great. See the maintenance form for detailed summary. Thank you!
Replace 4 burners and the burner housing which is corroded/ damaged. After reconnecting the gas pipe, I checked all of the fittings with a leak bubble solution. I rechecked the gas pressure in the gas valve as well. Lastly, I did a combustion test to check for oxygen, CO and CO2 levels and everything looked great.
The client said that his furnace seems to not be keeping up when we have very cold days. The first thing I checked was airflow when I arrived. The filter was very dirty. I replaced it with a new air filter. Next, I did a temperature rise calculation. The temperature rise was perfect, 55 degrees. Next, I checked the gas pressure and it was a little high. I adjusted it down to manufactures specification. I noticed that the burner tubes were a little rusty and upon noticing that the burner box was extremely rusty. I did a combustion test and the CO, CO2 and oxygen levels looked good. I believe that it was an airflow issue that caused the furnace to not be keeping up on extremely cold days. I showed the client a video of the burner box and the burners and told him I highly recommended he replaced them.
