A homeowner called in July 2026 about an LG mini-split that was losing refrigerant. Fong & Sullivan got someone out quickly, found the leak in about twenty minutes, repaired it, recharged the system and was finished inside an hour. Speed like that is most of what customers talk about — that, and the names: Justin, Matt, Joe, and Chris, the owner, who still shows up on jobs himself.
The company runs out of North Attleborough across southeastern Massachusetts — Plainville, Franklin, Wrentham, Attleboro, Mansfield, Norfolk, Walpole, Medway, Mendon, Hopedale and Sheldonville — doing heating, cooling, heat pumps, ductless mini-splits, water heaters and ductwork, with emergency service around the clock. Its Massachusetts HVAC licence, 920-SM-B, is active, its Better Business Bureau page carries an A+, and the company says it is a Bosch Home Comfort PRO certified dealer, an LG Premium Partner and an authorised Oxbox by Trane installer.
Heat waves are when people notice them. In July 2026 a customer whose AC had quit during one got it running after the crew took extra time to find the fault; another had Justin and Matt out fast in the same stretch of weather. A Mitsubishi mini-split that failed over a holiday got a visit as soon as they could reach it, with the owner's long list of questions answered on site. In May 2026 a total system replacement went in over a single day with a full crew, and the customer was walked through the finished system afterwards.
They take the stubborn diagnostic work too. In February 2026 a homeowner whose high-tech system had been loud with air velocity for years, after several other HVAC companies failed to solve it, had Christopher Garcia sort it out. In January 2026 a technician spent two hours going through a system, found several things making it inefficient and expensive and fixed what he could that day; on another January call Justin phoned the manufacturer mid-repair to be sure the fix was right. In March 2025 a house burning far too much oil was cured by a thorough cleaning that Chris recommended.
One thing runs through what customers write: they are told what is going on. Options get laid out, equipment sizing gets explained on site, and the final bill lands where people expected it to.
If your system is down in a heat wave, or you want a mini-split or heat pump installed by someone the manufacturers certify, this is a straightforward call. Check first that your town is on their southeastern Massachusetts list, and ask what an after-hours emergency visit costs, since they offer one around the clock.
