Direct Answer
To hire a reliable hvac system replacement contractor in New Haven: (1) Get 3 written quotes with line-item breakdowns, (2) Verify CT license at Connecticut Department of Consumer Protection (portal.ct.gov), (3) Confirm active general liability and workers' comp insurance, (4) Check Google and BBB reviews specific to New Haven projects, (5) Never pay more than 10-30% upfront — never pay in full before completion.
Full Explanation
Red flags specific to New Haven contractors: no physical New Haven-area address, pressure to start immediately, cash-only payment demands, and license numbers that don't verify at Connecticut Department of Consumer Protection (portal.ct.gov). Seasonal demand during summer brings out less reputable contractors.
Local Factors in New Haven
📍Verify license: Connecticut Department of Consumer Protection (portal.ct.gov)
📍File complaints: Connecticut Department of Consumer Protection (portal.ct.gov)
📍Homeowner protections under CT consumer protection law
📍BBB Greater New Haven chapter for complaints history