Recent Jobs and Reviews
Job Locations and Reviews
Mark D.
Check all controls we think it could be gas valve and pressure switch
Merrimack, NH 03054
Review
All was great.
Qwentin G.
Completed the plumbing maintenance today. I started off with flushing the rinnai tankless water heater with a cleaner for 40 minutes. After that I flushed 10 gallons of water through. I cleaned the water inlet screen. I vacuumed the inside of the unit and I vacuumed the air filter screen. I cleaned the electrode and flame sensors. I checked incoming gas pressure and that was according to manufacture specifications. Lastly I ran the unit and it was running great. I also completed the plumbing inspection. I took a look at all the fixtures and drains. The only drain that I saw leaking was the first floor bathroom. We will send over an estimate to repair the leaking pipe.
Manchester, NH 03104
Qwentin G.
I found that the collector box gasket had failed. I replaced the collector box, collector box gasket and inducer gasket. After I assembled it I ran the unit and checked for leaks and there was none. Lastly I performed a combustion analyzer test that checks the units CO, CO2 and oxygen levels and the furnace was running great.
Nashua, NH 03064
Mark D.
Plumbing for master bath for lav sink,shower and toilet.Customer to provide all fixtures.
Hampton, NH 03842
Review
Jack from GSMS came today and serviced our tankless hot water heater. Excellent job as always
Jack D.
GSMS HOMECLUB PLUMBING VISIT
Merrimack, NH 03054
Adam P.
Scope of Work: Replacement of the existing heating and cooling system with a new high-efficiency Lennox Heat Pump system. Indoor Equipment & Installation: Furnace & Coil: Installation of a new Lennox furnace and matching heat pump evaporator coil. Reuse of Existing Components: We will retain and re-connect to the existing return base and the existing AirBear filtration cabinet, as these are in good condition. Venting: The existing concentric vent kit will be removed and replaced with a new, optimized venting configuration routed to the exterior of the home. Lineset: A completely new refrigerant lineset will be run from the indoor unit to the outdoor unit location. Zoning & Controls (Smart Upgrade): Lennox Smart Zoning: The system will retain its current two-zone design but will be upgraded to the Lennox Smart Zoning System. This includes the installation of two new zone dampers, which allow for precise airflow modulation and significantly improved temperature control compared to
Bedford, NH 03110
Jack D.
Remove leaking fitting and reapply tape and dope.
Bedford, NH 03110
Qwentin G.
Completed the oil boiler maintenance today. I changed the nozzle, the pump strainer and the oil filter. I found that the expansion tank has failed. I found that the backflow preventer has failed and is leaking water on the ground. I brushed and vacuumed the heat exchanger. I ran the unit and performed a smoke test and got zero smoke. I performed a combustion analyzer test that checks the units CO, CO2 and oxygen levels and the boiler was running great. I replaced the whole house filter. I found a couple wires loose on the zone panel so that's why I believe the thermostats are being iffy. If this problem continues to exist then it could either be the zone panel or the circulator pump. The thermostat in the living room I sealed up the hole that the wire comes through because there's a draft coming through the wall making it sense lower than what it actually is. The client would like us to take a look at her shower. Whenever it is ran it leaks water out the bottom of it. I will send over
Londonderry, NH 03053
Jack D.
Rinnai wall heater not working. After trouble shooting I found 2 of the 3 flame sensors were reading very low and would not keep the main gas valve on. I removed them and cleaned them. I tested their flame sensing current after and it was good. The unit would stay lit. As a courtesy, I vacuumed the unit while I had the panels off. I noticed the middle propane tank outside was on 0%.
Rochester, NH 03867
Jack D.
Baseboard loop in "mud room" froze and burst. The Tennant said that the room was always cold. We cut it out of the first floor heat loop and bypassed it. Thank you!
Concord, NH 03301
Review
We had a no heat issue. Qwentin diagnosed the problem and kept me informed of the process. He got the furnace running and told me what to watch for until the part comes in that will be the permanent fix.
Review
Arrived on time, organized equipment. Friendly, answered all my “many questions”. Adam made sure all the equipment was in working order. Excellent service.
Review
A+
Review
Always amazing service, every team member at GSMS has always been great and performed exceptionally great service.
Review
Excellent Service
Review
Very nice and personable person. Explained everything to me in a way I could understand
Review
I never thought I’d meet anyone as cool nice and kind as Mark but Jack was amazing. He took on the dirty job.. No problem He was super communicative and explained everything. I’m really grateful to have Granite State Mechanical on speed dial.
Review
Jack was once again on time, diagnosed the problem quickly and fixed it. All GSMS staff are courteous and extremely professional. I wouldn’t go with anyone else.
Love dealing with this company. Their techs are always prompt, efficient and courteous. We've been happy to be their customer since 2010.
Response from GSMS Air•Heating•Plumbing:
Thank you so much for the kind words and for being part of the GSMS family since 2010! It means the world to us to have earned your trust over the years. I’m proud of our team for continuing to deliver the kind of service that keeps clients like you coming back. We truly appreciate your loyalty and support. – Zak D., Second-Generation Owner
Qwentin was on time, very friendly and professional. He was able to identify the issue, communicate it effectively, and then fix it. Highly recommend.
Response from GSMS Air•Heating•Plumbing:
Thank you so much for the kind words and for trusting GSMS to take care of your home. Qwentin is a rising star on our team, and it means a lot to hear that his professionalism and communication made a strong impression. As a local, family-run business, we’re grateful for your recommendation and honored to have earned your trust. – Zak D., Second-Generation Owner
Great water heater service. On time and professional l He gave me some helpful tips on other water related issues. Highly recommend GSMS.
Response from GSMS Air•Heating•Plumbing:
Thank you for the great review! I’m glad to hear our Specialist was able to get your water heater squared away and offer some extra tips while he was there. We always aim to go beyond just the repair, and I really appreciate you taking the time to share your experience. Thanks for choosing GSMS — it means a lot to our family and our team. – Zak D., Second-Generation Owner
top notch service, always professional. would recommend to anyone needing HVAC service, repair or install.
Response from GSMS Air•Heating•Plumbing:
It was a pleasure serving you and your family. Thank you for sharing your kind words with us. It means the world to us and to our entire team!
Had an issue with our heat pump. Reached out for assistance and they had someone on site that afternoon. Problem was resolved quickly. Super friendly service. The tech was exceptionally friendly and an excellent communicator. Highly recommend
Response from GSMS Air•Heating•Plumbing:
It was a pleasure serving you and your family. Thank you for sharing your kind words with us. It means the world to us and to our entire team!
Adam, Quin and Mark did a wonderful job installing my replacement oil boiler and oil tank. I have trusted GSM for 3 installs at my house because of their professionalism, workmanship, honesty, transparency and integrity for how they conduct their family business. Everyone who has worked at my house has always been informative, on time and respectful. I would recommend GSM to anyone who needs to have major plumbing or heating/cooling done in their home. Gina in customer service is the best at relaying information and gets back to you in a timely fashion. Zak is wonderful to work with and the entire team at GSM treats you with kindness. Thank you again for another wonderful experience because when it comes to your home it is one of the largest investments you will make in your life, and I trust GSM to be there for me in the future.
Response from GSMS Air•Heating•Plumbing:
We thank you for sharing your positive experience. It made our day.
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