603HVAC

603HVAC is a heating and cooling company whose website describes it as family-owned and serving Southern New Hampshire, with Raymond as its stated service area and 10 years in business. On Google it holds 4.8 stars from 78 ratings. A recent customer said Kyle serviced the inside mini splits and the outside condensers and cleaned out a chipmunks nest in one of the outdoor units. A recent customer said Zach showed up on time and was very thorough servicing a propane furnace. A recent customer got same-day service and said John was professional and helpful. A recent customer said Austin kept them aware of the cost, and that the upstairs is no longer an oven. A 2025 customer said Ethan from 603HVAC came out the afternoon they called about a leak from a 20-year-old oil boiler and sent a quote the next morning. That 2025 customer said 603 removed the old oil system and tank and had them up and running in 2 days. A 2025 customer who switched from oil to propane said Ethan, the owner, and his crew ran a new gas line, set up ductwork in the attic and installed a new gas furnace with a central A/C condenser, all in two days. A 2025 customer said Cory explained each concern during a boiler service and gave general timelines and pricing for future repairs. A 2022 customer said 603HVAC came in several thousand below all other companies on a whole house mini split install. A recent customer said that when the A/C failed, two messages left on the 24/7 service number were not returned for days, they paid a different company $600 for the fix, and a request to resolve it went unanswered for more than 2 weeks. A recent customer called the owner unprofessional, said they were left with a hefty bill to fix his errors, and wrote that they sued him and won. A 2026 customer said the air conditioning in their brand new house did not work, that Ethan visited twice toward the end of summer and told them it was their fault, and that they were still left with a non-functioning system. A 2025 customer said their 2-year-old AC unit was still not fixed after 2 months, that a new unit was offered twice and never installed, and that a new company later found a leak from day one. New Hampshire lists HVAC licence MBE1801081 as active, held by 603 HVAC LLC.