0% Interest Financing and Lennox Rebates Up to $1,800
Request Service Call Now Contact Us Coupons

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 150 customer reviews

Customers say: The recent reviews exhibit a predominantly positive sentiment, with recurring themes of satisfaction, professionalism, and expertise. Customers express gratitude, recommend the company, and acknowledge the quality of the work performed. Positive reviews frequently mention friendly and knowledgeable technicians, timely responses, and efficient service. Negative reviews are minimal and do not represent a clear, recurring trend. Overall, the reviews suggest a positive experience with the company, with many customers expressing satisfaction with their HVAC and plumbing needs.

Job Locations and Reviews

Jack D.
Jack D. Checked in
GSMS HOMECLUB PLUMBING VISIT
Nashua, NH 03064
Jack D.
Jack D. Checked in
GSMS HOMECLUB PLUMBING VISIT.
Nashua, NH 03064
Jack D.
Jack D. Checked in
GSMS HOMECLUB PLUMBING VISIT. 80GAL HW HEATER NEED3D ANODE REPLACED.
Nashua, NH 03064
Jack D.
Jack D. Checked in
GSMS HOMECLUB PLUMBING VISIT
Nashua, NH 03064
Jack D.
Jack D. Checked in
Tighten cartridge nut and add thread lock to secure in place.
Nashua, NH 03064
Jack D.
Jack D. Checked in
Replace ptrap in upstairs sink.
Manchester, NH 03102
Jack D.
Jack D. Checked in
Diagnose cold water pressure loss in upstairs bathroom faucet. I had to remove and clean the cartridge. I also looked at a few other items to quote for repair that we will email over.
Barrington, NH 03825
Jack D.
Jack D. Checked in
Replace cracked fitting at well gauge.
New Boston, NH 03070
Jack D.
Jack D. Checked in
Go through each gas lantern to determine what needs to be done in order for them to be fixed.
Manchester, NH 03104
Jack D.
Jack D. Checked in
Replace 1/2" valve due to old stop and waste leaking.
Londonderry, NH 03053
Jack D.
Jack D. Checked in
Upon further investigation, it was determined that the Daikin mini-split unit in the elevator room has a crack in the drain pan which is further causing the leak. For this Daikin unit, the drain pan is a part of the bottom frame assembly and will require us to replace that section. This repair will be completed.
Londonderry, NH 03053
Review
The service was really good. He did great work.
Ann - Derry, NH 03038
Jack D.
Jack D. Checked in
New hot and cold copper manifolds were installed to replace the problematic polybutylene valves. New main water ball valve shut off installed and corroded piece of copper and rusty hanger replaced. Tested for leaks. Thank you!
Derry, NH 03038
Nashua, NH - I found the old valve that serves the out door faucet to ve the cause of the leak. I quoted a replacement. Thank you!
Jack D.
Jack D. Checked in
I found the old valve that serves the out door faucet to ve the cause of the leak. I quoted a replacement. Thank you!
Nashua, NH 03062
Jack D.
Jack D. Checked in
We will safely replace your existing 40-gallon electric water heater with a brand-new, direct replacement unit in the same location. This installation includes complete code compliance for the city of Manchester, as well as a leak detection and shut-off system to protect your home. Scope of Work: Removal & Disposal: Safely drain, disconnect, and remove the existing 40-gallon electric water heater. Plumbing Modification: Cut out and remove the existing sediment filter on the water line. Because your home is on municipal city water, this filter is unnecessary; removing it will streamline your plumbing and eliminate a potential maintenance headache. New Tank Installation: Provide and install a new 40-gallon electric water heater in the existing location. Code & Performance Upgrades: Provide and install all new essential components to meet current Manchester plumbing codes and extend the life of the tank. This includes a new thermal expansion tank, a thermostatic mixing valve, and a v
Manchester, NH 03101
Repair piping in closet that rodents chewed. Replace 2 valves under sink. We will quote to repair main shutoff valve and replace the hot and cold manifolds.
Repair piping in closet that rodents chewed. Replace 2 valves under sink. We will quote to repair main shutoff valve and replace the hot and cold manifolds.
Jack D.
Jack D. Checked in
Repair piping in closet that rodents chewed. Replace 2 valves under sink. We will quote to repair main shutoff valve and replace the hot and cold manifolds.
Derry, NH 03038
Jack D.
Jack D. Checked in
I believe the burning smell was caused by loose insulation threads making contact with the hest exchanger. I removed the threads and the smell went away.
Nashua, NH 03062
Replaced the failed indirect water tank. Checked for leaks and there was none. Replaced the domestic water expansion tank. Completed the maintenance on the boiler. I started off with checking all the wiring connections and everything looked good. Next I pulled the flame sensor and cleaned it. I vacuumed out the burners and the burner box. I checked incoming and outgoing gas pressure and those were accordance to manufacturer specifications. I inspected all the boiler accessories and the only thing that I found was that the high vent was leaking water. Lastly I ran the unit and performed a combustion analyzer test. This checks the unit CO, CO2 and oxygen levels. The boiler was running good. I bled the air from the hot and cold water lines before I left.
Replaced the failed indirect water tank. Checked for leaks and there was none. Replaced the domestic water expansion tank. Completed the maintenance on the boiler. I started off with checking all the wiring connections and everything looked good. Next I pulled the flame sensor and cleaned it. I vacuumed out the burners and the burner box. I checked incoming and outgoing gas pressure and those were accordance to manufacturer specifications. I inspected all the boiler accessories and the only thing that I found was that the high vent was leaking water. Lastly I ran the unit and performed a combustion analyzer test. This checks the unit CO, CO2 and oxygen levels. The boiler was running good. I bled the air from the hot and cold water lines before I left.
Jack D.
Jack D. Checked in
Replaced the failed indirect water tank. Checked for leaks and there was none. Replaced the domestic water expansion tank. Completed the maintenance on the boiler. I started off with checking all the wiring connections and everything looked good. Next I pulled the flame sensor and cleaned it. I vacuumed out the burners and the burner box. I checked incoming and outgoing gas pressure and those were accordance to manufacturer specifications. I inspected all the boiler accessories and the only thing that I found was that the high vent was leaking water. Lastly I ran the unit and performed a combustion analyzer test. This checks the unit CO, CO2 and oxygen levels. The boiler was running good. I bled the air from the hot and cold water lines before I left.
Hooksett, NH 03106
Jack D.
Jack D. Checked in
Boiler flow switch is bad. I installed temporary low water cut off in order to keep the boiler on line for the residents. We will order the switch and return this week to replace it.
Concord, NH 03301
Jack D.
Jack D. Checked in
Add in a pressure reducing valve.
Manchester, NH 03102
Manchester, NH - Replaced water heater.
Jack D.
Jack D. Checked in
Replaced water heater.
Manchester, NH 03102
Jack D.
Jack D. Checked in
Water heater estimate.
Merrimack, NH 03054
Jack D.
Jack D. Checked in
Add waste water check valve in basement trap. Add water hammer arrestors to washing machine valve. Perform comprehensive water test to drop off at NH State certified water testing facility.
Amherst, NH 03031
Replace toilet. Cutout old iron flange and add stainless steel flange. Replace Kohler canister gasket. Measure shower for replacement.
Replace toilet. Cutout old iron flange and add stainless steel flange. Replace Kohler canister gasket. Measure shower for replacement.
Jack D.
Jack D. Checked in
Replace toilet. Cutout old iron flange and add stainless steel flange. Replace Kohler canister gasket. Measure shower for replacement.
Hollis, NH 03049
Jack D.
Jack D. Checked in
To permanently resolve the leak and ensure safe, consistent water temperatures, we recommend a complete internal rebuild of the shower valve using genuine OEM Kohler replacement parts. We do not recommend a "partial" repair, as disturbing the old, hardened O-rings on the secondary components will likely cause new leaks behind the finished wall.
Manchester, NH 03102
Jack D.
Jack D. Checked in
I reccomend replacing water tank due to high TDS on hit water, yellow color, and anode rod being completely gone.
Manchester, NH 03102
Review
Excellent service.
Kathleen - Merrimack, NH 03054
Review
Professional service
Paul - Nashua, NH 03062
Review
When a GSMS contractor comes to your home, it’s not just another contractor doing a job, it’s a personable experience from someone who truly cares about the neatness and quality of their work to the quality of their relationship with you, the customer… they quickly feel like an extension of your family making you look forward to their visits and not feeling concerned in any way how it’s going to go. Always 5 stars from me and two thumbs up, if I can count my big toes, it’s 4 digits up from me!! 👍👍👍👍🙂🙂
Martin - Stratham, NH 03885
Review
Great work as always
Mark - Hollis, NH 03049
Review
Jack did a super job! Very thorough and competent. I feel like I’m in good hands with GSMS.
BJ - Merrimack, NH 03054
Review
Jack from GSMS came today and serviced our tankless hot water heater. Excellent job as always
Tom F - Merrimack, NH 03054
Review
Excellent Service
Guimont - Londonderry, NH 03053
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.
Kathleen - Nashua, NH 03064
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.
Ronald - Merrimack, NH 03054
Review
Excellent work
Turning - Manchester, NH 03103
Review
No heat emergency situation handled immediately on a Sunday evening. Great service!
Paul - Amherst, NH 03031
Review
Jack was prompt and did a great job tuning our furnace.
Vincent - Nashua, NH 03064
Review
Did annual maintenance on the furnaces so we are all set for winter!
Lori B - Nashua, NH 03060
Review
Excellent service!
Darlene - Manchester, NH 03109
Trusted Quality & Service