Cotti-Johnson HVAC

Cotti-Johnson runs HVAC, electrical and plumbing service out of Taunton with a review history most contractors this size would envy: 4.8 stars across 1,419 Google ratings and 653 reviews on file going back to 2017. Its Massachusetts HVAC license is active and verified, and it's been a BBB-accredited A+ business since 2021. The specific, detailed reviews span the whole trade lineup. In a recent review, a homeowner describes a full Lennox heat pump and AC install where the crew 'showed up when they said they would' and took pride in the work; another recent review describes routine AC service with no pressure to buy anything extra. In a 2025 review, a customer whose Generac generator had been installed by a different company that doesn't service its own installs says Cotti-Johnson's technician made three visits, explaining the issues and pricing clearly each time. And in a recent review, a technician who arrived after a neighbor's fallen tree tore out an electrical panel is described as going above and beyond, leaving the site clean when the emergency repair was done. Set against that, a cluster of recent and dated reviews describe real problems on bigger jobs and on billing. A recent review describes a $25,000-plus whole-house mini-split system that 'has not worked right from the very first day.' A review from February 2026 describes a $15,000 heating system, installed the previous September, that malfunctioned four times within six months. A review from January 2026 describes a technician spending seven hours pursuing the wrong diagnosis and still charging $1,500 without fixing the problem. In a 2024 review, a customer was billed for two separate service calls — plus a diagnostic fee on top — to replace a warrantied thermostat that could have been done in one visit. And in a 2025 review, a customer who called for an electrical estimate says a technician attempted unauthorized work, snapped a breaker with pliers, and still charged a $59 consultation fee. A recent review from a paying monthly member describes going a full month without hot water despite repeated calls. For routine HVAC, electrical and plumbing service calls, the volume and specificity of the positive record here is real and consistent across years. For a full system replacement or another big-ticket install, get the warranty terms, the complete fee schedule, and a firm response-time commitment in writing before signing.