Verified record
56 Heating And Cooling Corp is a two-person HVAC outfit based in Lawrence, run by technician Luis Diaz, who — Thumbtack's profile says — is two years into the business and holds an EPA Universal refrigerant certification, a NORA oil-heat technician certification, and a Massachusetts Sheet Metal Apprentice License listed on the platform, not independently verified. It's a young track record but a striking one so far: 4.9 stars across 102 Thumbtack ratings, with Top Pro status. What comes through in the five reviews on file, all from early to mid 2026, is a pattern of Diaz walking customers through the diagnosis before touching anything. One reviewer's leaking heating system was traced to two broken pipes and repaired instead of the roughly $15,000 full replacement they'd been bracing for. Another called in a complicated NTI combination boiler problem — a corroded heat exchanger, then a failing flow switch — that Diaz worked through with the manufacturer's own technical support rather than guessing. A third needed a no-heat furnace fixed and got same-day diagnosis with the part installed once it arrived. Pricing came up once: a customer described some initial confusion over the bill, which by their account Diaz cleared up and made right rather than letting stand. There's no state-verified license on file yet — the sheet metal apprentice credential is a Thumbtack listing, not a registry check — and the five-review sample is thin and drawn from a single platform. For anyone with a furnace, boiler, or mini-split acting up and wanting the diagnosis explained along with the fix, this is the kind of profile worth a call; just confirm the license and get pricing in writing before the truck rolls.
Typical Greater Boston range for this kind of work, from regional averages — not a quote from 56 Heating And Cooling Corp. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
Here’s a professional, genuine review you could leave: ⭐⭐⭐⭐⭐ I had a complicated issue with my NTI GF200 combination boiler that was causing intermittent hot water problems. He was thorough in diagnosing the issue, took the time to work through it with NTI technical support, and ultimately identified that the flow switch needed to be replaced after first addressing a badly corroded heat exchanger that required a full cleaning. Throughout the process he was responsive, honest, and willing to explain what he found. When there was confusion about the pricing, he listened to my concerns, clarified everything, and worked with me to make it right. That level of professionalism and integrity goes a long way. The boiler is now working properly, and I appreciate the time and effort he put into solving a difficult problem rather than just replacing parts blindly. I would definitely recommend him to anyone looking for someone knowledgeable, hardworking, and committed to getting the job done correctly.
I can’t say enough good things about this company. From start to finish, they were professional, responsive, and delivered outstanding quality work at a very fair price. What really stood out was their commitment to customer service. When I needed help, they were incredibly responsive and even came out after hours to make sure everything was taken care of. That level of dedication is hard to find. Luis was especially excellent. He took the time to thoroughly explain how my HVAC system works, walked me through the different readings and measurements, and made sure I understood exactly what he was seeing and why it mattered. Rather than just fixing the issue and leaving, he educated me about the system so I could better understand and maintain it going forward. The workmanship was top-notch, the communication was excellent, and the value for the money was outstanding. If you’re looking for an HVAC company that truly cares about its customers and stands behind its work, I highly recommend them.
I was highly impressed by the punctuality, quality of work, and professionalism. Luis not only worked on servicing my HVAC and heating system; he also explained each step he took which helped me to understand the extent of what was being done. As a new homeowner, working with Luis was very refreshing. I highly recommend working with this company.
Luis was the diagnostic technician and the repair person. He really knew what was broken ( 2 pipes) and tested the entire heating system to be sure of his recommendations. I was so relieved not to have to do a full replacement which started at 15k !! I cannot say enough about this efficient and honest father / son company . The service North Shore to NH!!
Excellent experience with 56 heating and cooling. The team was at my house within hours to diagnose the problem and returned back once the part was in to fix it promptly. Greta communication and great value - 100% will call them back to service my unit!
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1 change recorded — last scanned Sep 9, 2026.
Transparent diagnostics5.0
Repeat, years-long customers5.0
Decades-long customers5.0
Honest, no-upsell service5.0
Rapid response5.0
