Your Trusted Heating, AC & Plumbing Experts in Windham, NH
Since 1987, GSMS has been proud to offer top-notch HVAC services to residents of Windham, NH. With over three decades of experience, our family-owned business has built a reputation for excellence, reliability, and outstanding customer service. We provide a comprehensive range of HVAC services, including air conditioning repair, replacement, and maintenance, as well as heating services for furnaces and boilers. Our expert technicians are also skilled in installing and maintaining ductless mini-split systems, ensuring that your home stays comfortable year-round. At GSMS, we use only the highest quality products from leading manufacturers, guaranteeing efficient and long-lasting solutions for your HVAC needs. Whether you need a quick repair, a complete system installation, or regular maintenance, our team is dedicated to providing personalized service tailored to your specific requirements. Don’t let HVAC issues disrupt your comfort—call GSMS today at 603-424-8258 to schedule your HVAC service in Windham, NH, and experience the difference of working with trusted local professionals.
In addition to our heating and air conditioning services, we offer top-quality plumbing services to the residents of Windham, NH. With over three decades of experience, our family-owned business has established a reputation for trust, reliability, and exceptional customer care. Our comprehensive plumbing services include water heater repair, replacement, and maintenance for both tank and tankless models, ensuring your home has a consistent supply of hot water. We also specialize in kitchen plumbing, from faucet and sink installations to dishwasher and water line services. In the bathroom, our expert plumbers handle everything from toilet and shower repairs to vanity plumbing and pipe replacement. At GSMS, we use only the highest quality materials and the latest techniques to provide efficient and long-lasting solutions for your plumbing needs. Whether you require a quick repair, a complete installation, or regular maintenance, our team is committed to delivering personalized service tailored to your home’s unique requirements. Don’t let plumbing issues disrupt your daily routine—call GSMS today at 603-424-8258 to schedule your plumbing service in Windham, NH, and experience the peace of mind that comes with working with trusted local professionals.
Recent Jobs and Reviews in Windham, NH
Our Local Reviews by City
- Amherst, NH (3)
- Atkinson, NH (1)
- Auburn, NH (1)
- Barrington, NH (12)
- Bedford, NH (12)
- Candia, NH (2)
- Chester, NH (1)
- Concord, NH (5)
- Derry, NH (2)
- Epping, NH (1)
- Gilmanton, NH (1)
- Goffstown, NH (3)
- Henniker, NH (2)
- Hillsborough, NH (1)
- Hollis, NH (7)
- Hooksett, NH (5)
- Hudson, NH (4)
- Lee, NH (1)
- Londonderry, NH (9)
- Manchester, NH (32)
- Merrimack, NH (13)
- Milford, NH (3)
- Moultonborough, NH (1)
- Nashua, NH (19)
- New Boston, NH (2)
- Northfield, NH (1)
- Northwood, NH (1)
- Pembroke, NH (1)
- Raymond, NH (1)
- Rochester, NH (2)
- Salem, NH (3)
- Sandown, NH (1)
- Stratham, NH (1)
- Weare, NH (3)
- Windham, NH (6)
Job Locations and Reviews
Estimate for gasline to grill
Half upfront payment will be required for this project. Please see description for scope of work.
Fast and Efficient
Repaired outside faucet.(Will stop by and replace diverter valve new one has bad handle)
Mark is careful, knowledgable, efficient, and friendly Thanks!
Replaced toe kick heater
Thank you for the great service!!
Replaced rinnai water heater
I found the lennox smart hub to be failed. I tested all of the comm signals and they were good. I have had this before with a bad hub so I replaced it with a new generation. I tested the system and it is working correctly now. Thank you.
Water heater maintenance. Arrived to perform routine maintenance on a Rinnai tankless water heater, ensuring it was running efficiently. I flushed the system to remove any mineral buildup and checked for potential issues, preventing future breakdowns. After testing the unit, I confirmed it was operating at peak performance, providing reliable hot water for the homeowner.
Replace kitchen hot water heater
Fantastic. I couldn’t be more satisfied. I don’t have heat yet but I didn’t expect to. As long as he returns with the required parts in a reasonable length of time, I’ll be happy.
Thank you for the wonderful review and for taking the time to share your feedback.
Look at water source heat pump that has a failed heat exchanager. We will email back with price to fix.
Meeting with Rinaii rep. We diagnosed the servo valve as being the noise issue. The rep will order a new one under warranty. Thank you.
Atmospheric vent seemed to be stuck. Also possible grease buildup in trap. I flushed my drain cleaner and replaced the vent. Everything is draining great. I also found the basket strainer gasket to have a slow leak. I tightened that up! Thank you!
I replaced the two check valves and circulator pump on the Rinnai tank less water heater according to the rep. Please let us know if the noise goes away. I also collected another water sample to drop off. Thank you.
Excellent Service!
GSMS HomeClub heating maintenance on both Lennox Signature Series furnaces. Everything looks great. New air filter in each system. Shock well, follow instructions on sheet. I also replaced the crossover valve for the Rinnai tankless water heater system.
While performing the 4000 hour maintenance on your Rinnai combi boiler I noticed that the following components/ parts need to be replaced due to failure: boiler expansion tank, boiler relief valve, and boiler electronic water pressure sensor. Both isolation valves started leaking when I shut the valves off as required by the service manual. I exercised the valves on and off a few times and it is not leaking. Keep your eye on it and if it starts leaking it will need to be replaced. The condensation drain pan had an extreme crystallized mineral buildup that required tedious work to scrape off in order to ensure that the new gasket would seal properly when reinstalled. I reassembled all of the components with the new gaskets that came with the 4000 maintenance kit. When performing the startup the 3 way valve was not opening. I removed the solenoid and opened it manually. When I reinstalled the solenoid it opened and closed as required by the boiler heating demand, ie domestic hot water vs
Everything went great! Thank you
Started injector and turn toilet on.
Forgot to install pump.
Regarding the Faucet at my house ... would there be any kind of warranty on that unit - doesn't appear to be too long ago we put it in and now it became defective? Thanks - Phil
Adjusted the faucet for optimal water flow and repaired a critical issue with the kitchen drain. The drain had become disconnected from the trap, causing significant water leakage inside the cabinet. Reconnected the trap securely and checked for any additional leaks. Ensured the drain assembly was properly sealed to prevent future issues. After thorough testing, the faucet delivers consistent water flow, and the kitchen drain is functioning without leaks.
Mitsubishi Mini-Split Multi Zone Installation
