Callahan A/C & Heating Services

Callahan A/C & Heating Services is a North Andover shop that's been installing and servicing HVAC and some plumbing systems since at least 2021, holding an active Massachusetts HVAC license and an A+ BBB grade. On Google its 4.2★ average sits across 42 ratings, and the fuller written history — 32 reviews from 2021 through early 2026 — reads more mixed than that headline number. The installs are where the praise concentrates. Reviewers describe a Mitsubishi heat pump with ducting to every room finished in two days without leaving the crawl space a mess, a new steam boiler put in with tarps down to protect the rugs, and a central AC replacement that beat three competing quotes on price while other bidders "proposed unnecessary services." Techs get named repeatedly — Nick troubleshot a furnace other companies couldn't fix and diagnosed a same-day AC failure with a smile, Daniel talked customers through a thermostat and left plain-language instructions, Justin traced a heat-wave AC outage to a wiring fault. On Reddit, Callahan turns up as a repeat local recommendation, alongside a note that its diagnostic visit runs about $100. Recurring complaints follow a similar shape: a job gets billed again on a return visit without actually being fixed. A 2025 review says a furnace kept failing for three years and each follow-up visit was charged without resolving it; another review from the same month describes the same pattern with a different system. A mini-split that failed its pre-summer check twice is a smaller version of the same complaint. Two 2024 reviews raise more serious concerns: one alleges a technician left the HVAC condenser pump unplugged after a service call, flooding a basement and causing mold and wood rot, with the company allegedly unresponsive for weeks; another describes being charged more than $7,000 for a repair the customer says wasn't needed and couldn't be undone. A separate 2025 review, unrelated to any HVAC work, describes an employee driving aggressively near the reviewer's child. Given the volume of praised installs against a handful of serious billing and conduct complaints, anyone considering Callahan for post-install service or a repeat visit should get a clear diagnosis and a firm price in writing before authorizing more work.