Absolute Mechanical Systems Custom Heating & Cooling

Absolute Mechanical Systems is a heating and cooling company whose website lists a service area of Brookline, Milford, Nashua, Amherst, Hollis and nearby towns. One recent Google customer with a leaky boiler said a phone call to the company turned up a suggestion to soak the area with penetrating oil so the bolts could come out and the leak be repaired instead of replacing the boiler, and it worked. That customer said a non-functioning AC unit was fixed a few minutes later, with a bill they called very reasonable. The company says it is family-run, was established in 1998 and has NATE-certified technicians. Its New Hampshire HVAC license, number MBE1000622, in the name of Absolute Mechanical Systems Inc, is expired on the state registry. A recent customer said Kevin and his crew put in mini splits, were on time and worked with them to install properly sized units. A recent reviewer said Mike fixed a leaky system. A 2025 customer said Kevin was out within half an hour of a call about a squealing power vent motor, and the problem was fixed about an hour later. A 2025 reviewer said Kevin spent four phone calls walking them and their maintenance man through testing an office building's AC after a tech from a different company had told them the entire thing needed to be replaced, and the system turned out fine. A 2023 customer said they were the only ones to respond for emergency service at 9:00 on a Sunday evening with the heat out at 25 degrees, and the technician fixed a valve. A recent customer said the company installed two Fujitsu mini split heat pumps about eight years ago, both indoor units developed refrigerant leaks, and a later HVAC contractor pointed out that metal screws used on the outside line covers had rusted and spread rust to the copper lines; that customer called it a "crappy installation job." A 2025 customer said a worker missed a propane leak and misdiagnosed it as "litter box odor," and that 2025 reviewer said the call to report it became argumentative and ended in an accusation of non-payment before any invoice arrived. A 2023 customer said the heat pump stopped working after an annual tune-up, and after the missing gas was fixed the furnace was smoking into the vents. A 2022 customer said the company charged for a water heater visit without fixing the problem, then refused to come back because that payment was delayed, and someone else later found soot buildup that meant a whole new water heater. A 2022 customer whose furnace the company installed in 2020 said they were told it no longer serviced their area and to call someone else. In 2024, a customer with no heat said the person on the phone told them the company was not taking new customers. In an April 2023 r/newhampshire Reddit thread, a poster wrote, "I only use Absolute Mechanical in Brookline," adding, "I won’t use anyone else."