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Jack Downing

Jack Downing

Senior Service Specialist

Rating

Reviews

LICENSES: GAS SERVICE

Having grown up in the family business, Jack officially entered the trades and joined the GSMS team seven years ago because it simply felt like the perfect fit. Guided by the Golden Rule, Jack appreciates the genuine kindness of both his colleagues and his clients, and he wants every customer to know that the team will always try to do their absolute best on every job. A natural learner who loves to master new skills, Jack stays incredibly active outside of work. You can usually find him renovating his first house, woodworking, playing the guitar and drums, or experimenting with new recipes on the grill and smoker. Depending on the season, he also loves skiing or cycling. Above all, he cherishes the time he spends with his fiancé, Hope, and their Australian Shepherd, Norman. Jack is also a proud member of the Pointer Fish & Game Club.

Name: Jack Downing

Recent Jobs and Reviews

Rated 5.0 out of 5 stars based on 170 customer reviews

Customers say: The overall sentiment across these reviews is overwhelmingly positive, reflecting high levels of customer satisfaction and appreciation. Customers consistently express enthusiasm about the quality of service they received, with recurring praise for professionalism, expertise, and efficiency. A dominant theme throughout is the technical skill and knowledge demonstrated by the service team, with many reviewers highlighting how thoroughly problems were diagnosed and resolved. The interpersonal qualities of the technicians emerge as another strong positive trend, with customers frequently describing them as friendly, personable, pleasant, and respectful. Communication stands out as a particularly valued aspect, with reviewers appreciating clear explanations, patience in answering questions, and being kept informed throughout the service process. Timeliness and punctuality are consistently mentioned as strengths, alongside respect for customers' property and maintaining clean, orderly work practices. Many customers express strong loyalty and trust in the company, with several indicating they are repeat customers or plan to continue using the service. The tone is enthusiastic and grateful, with multiple reviewers offering strong recommendations and expressing genuine happiness with the results. Overall, these reviews paint a picture of a service provider that excels in both technical competence and customer care, creating consistently positive experiences that foster long-term customer relationships.

Job Locations and Reviews

Jack D.
Jack D. Checked in
Boiler repairs: Expansion tank, relief valve, air vent, and temperature + pressure combination gauge. Boiler not able to repair. Red tagged.
Manchester, NH 03102
Review
GSMS is my go to and I have never been let down. Jack was here on time, was professional, courteous, friendly and completed my service quickly and efficiently. Always a great experience when GSMS comes around!
Jared - Hooksett, NH 03106
Jack D.
Jack D. Checked in
GSMS HomeClub AC maintenance on both systems. New Filters in both.
Hopkinton, NH 03229
Jack D.
Jack D. Checked in
GSMS HomeClub ductless system maintenance.
Hooksett, NH 03106
Review
excellent service, courteous and very fair price
R Carl - Concord, NH 03301
Jack D.
Jack D. Checked in
AC Maintenance. System operation improved.
Concord, NH 03301
Jack D.
Jack D. Checked in
Planned AC servicing.
Bedford, NH 03110
Review
Jack provided excellent service for the air conditioner.
Gary - Stratham, NH 03885
Jack D.
Jack D. Checked in
GSMS HomeClub AC Maintenance.
Stratham, NH 03885
Review
Excellent
Mike - Hampton, NH 03842
Jack D.
Jack D. Checked in
Fujitsu 97 error. Outdoor fan motor has play in shaft. I recommend replacing to prevent errors from happening again.
Candia, NH 03034
Jack D.
Jack D. Checked in
Completed the mini split maintenance today. Everything went great. Please see the attached form.
Londonderry, NH 03053
Jack D.
Jack D. Checked in
System low. Added 4lbs.
Hampton, NH 03842
Jack D.
Jack D. Checked in
Replace kitchen hood control module.
Bedford, NH 03110
Jack D.
Jack D. Checked in
GSMS HomeClub AC maintenance. Replaced Lennox PureAir filter kit.
Merrimack, NH 03054
Jack D.
Jack D. Checked in
Error 10 on Rinnai. Burners were plugged up. I blew them out with compressed nitrogen. We ran multiple fixtures to ensure hot water. 140F set at the tank which is very hot. I confirmed with client that it has always been set at that temperature.
Barrington, NH 03825
Jack D.
Jack D. Checked in
Replace condensate trap. Test with water/ cleaner.
Derry, NH 03038
Jack D.
Jack D. Checked in
Cleaned up the pump internals and it is working. A piece on the pump is slightly broken but I was able to seal it. I cycled over a quart of water through the pump and no leaks. I reccomend replacing the pump with a better option.
Bow, NH 03304
Review
Jack was on time and courteous. Addressed the issue
Sandra - Bedford, NH 03110
Jack D.
Jack D. Checked in
Undersink water heater leaking. Needs to be replaced. We will send an estimate.
Bedford, NH 03110
Go over entire system. Bypass humidifer 
 -Reccomend replacing the unit
 -Reccomend replacing the saddle valve with a stop valve


Zoning is now labeled
 -One of the 2nd floor zoned trunks has 1 grille in basement for supplemental heat. Close in summer.
 -One of the 1st floor zoned trunks has 2 grilles in basement for supplemental heat. Close both in summer. 
Blower motor capacitor needs replacement. It is a 15uf and it is currently reading 10uf. 
Furnace red tagged due to undiagnosed high CO.
We will provide water test quote with PFOA pricing.
Go over entire system. Bypass humidifer 
 -Reccomend replacing the unit
 -Reccomend replacing the saddle valve with a stop valve


Zoning is now labeled
 -One of the 2nd floor zoned trunks has 1 grille in basement for supplemental heat. Close in summer.
 -One of the 1st floor zoned trunks has 2 grilles in basement for supplemental heat. Close both in summer. 
Blower motor capacitor needs replacement. It is a 15uf and it is currently reading 10uf. 
Furnace red tagged due to undiagnosed high CO.
We will provide water test quote with PFOA pricing.
Jack D.
Jack D. Checked in
Go over entire system. Bypass humidifer -Reccomend replacing the unit -Reccomend replacing the saddle valve with a stop valve Zoning is now labeled -One of the 2nd floor zoned trunks has 1 grille in basement for supplemental heat. Close in summer. -One of the 1st floor zoned trunks has 2 grilles in basement for supplemental heat. Close both in summer. Blower motor capacitor needs replacement. It is a 15uf and it is currently reading 10uf. Furnace red tagged due to undiagnosed high CO. We will provide water test quote with PFOA pricing.
Amherst, NH 03031
Moultonborough, NH - PM on both central air systems in main home. Turn on Rinnai constant recirculation. Fix shower valve. Diagnose steam generator error. I found it to have low water level error. Tech support will be sending us the necessary parts under warranty; labor not included. PM on barn ductless system. Thank you.
Jack D.
Jack D. Checked in
PM on both central air systems in main home. Turn on Rinnai constant recirculation. Fix shower valve. Diagnose steam generator error. I found it to have low water level error. Tech support will be sending us the necessary parts under warranty; labor not included. PM on barn ductless system. Thank you.
Moultonborough, NH 03254
Review
Arrived on time, excellent service
Kathleen - Merrimack, NH 03054
GSMS HomeClub AC Maintenance.
GSMS HomeClub AC Maintenance.
Jack D.
Jack D. Checked in
GSMS HomeClub AC Maintenance.
Manchester, NH 03104
Jack D.
Jack D. Checked in
GSMS HomeClub AC maintenance.
Manchester, NH 03109
Jack D.
Jack D. Checked in
Mice chewed up wires.
Londonderry, NH 03053
Jack D.
Jack D. Checked in
Client not used to system running at efficient rate. I made sure to still check operating pressures and subcool. All set.
Goffstown, NH 03045
Jack D.
Jack D. Checked in
Replace internals for outside faucet.
Manchester, NH 03102
Jack D.
Jack D. Checked in
Tighten flare and top off with refrigerant.
Nashua, NH 03062
Jack D.
Jack D. Checked in
GSMS HomeClub AC maintenance.
Nashua, NH 03062
Jack D.
Jack D. Checked in
GSMS Homeclub AC visit. Everything went great. The loud noise at the outdoor unit was caused by the sheet metal resonating off of other pieces. I placed some plastic shims in certain spots and the noise is gone. Thank you!
Hooksett, NH 03106
Review
Great service
Raymond - Epping, NH 03042
Review
Jack was so knowledgeable and kind. Found the problem right awa
Cecile - Nashua, NH 03062
Review
Jack arrived promptly @ 8:30a, inspected and troubleshooted to find the problem as to why the AC was not working properly and repaired it promptly. Out the door within 3 hours and AC is working properly. Thanks so much!
Peggy - Manchester, NH 03103
Review
Jack replaced the hot water heater in our condo. He was prompt, very professional, and was very knowledgeable. He was mindful and took care regarding the items stored in the basement. He explained what he did and ensured all questions were answered before he left. GSMS will always service our homes. Thank you Jack and everyone on the GSMS team!
Deb - Hampton, NH 03842
Review
They are always great
Steve - Candia, NH 03034
Review
Arrived in a timely manner with a cheerful attitude. He went straight to work and completed the job quickly/efficiently. Thank you Jack.
Kathleen - Merrimack, NH 03054
Review
Very good.
Phil - Hooksett, NH 03106
Review
I’ve used GSMS for years now. They have always provided top notch services and workmanship. Shout out to Jack specifically for today help 🙌🏻
Sam - Concord, NH 03301
Review
Jack is a nice guy. Explains things well. Respectful of my home. Thorough
Georgia - Epping, NH 03042
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