ModCon Service and Support Inc.

ModCon Service and Support Inc. works on boilers and heating systems from 71 Westech Dr in Tyngsborough, Massachusetts. Its site describes a small business specializing in installation, service and repair, says it has been in business 8 years, and states that it offers free estimates. The Better Business Bureau lists boiler installation, boiler repair, boiler service and plumbing among the services offered and gives an A+ grade. Google shows 4.9 stars from 83 ratings. One reviewer says the water pressure valve on their boiler broke and water started flooding the basement, that ModCon asked some questions, figured out the likely problem and the part needed, and came first thing the next morning to replace the part. Another says they had hot water again within 30min of arrival. A third says the company came on time, actually somewhat early, finished sooner than expected, and did not need to do something on the estimate, so cost was reduced. In a February 2026 review, a customer whose boiler failed on a cold weekend said the technician talked them through a procedure that would keep an uninsulated water line from freezing before the system was up and running again, and that they were provided with a realistic time frame. In another February 2026 review, a customer said their furnace shut down on one of the coldest and snowiest days of the year, that Jenn called back after they emailed and scheduled same-day service, and that Luke came as scheduled. A January 2026 reviewer said they had called on ModCon for 20+ years and pointed to its expertise, service and responsiveness. A 2025 reviewer said Bret and his team serviced their last boiler when they could not find anyone to repair it. In a February 2026 review, a customer said they were not given the estimate beforehand, that the technician spent ~5 minutes confirming everything was working, and that the bill was over $300. A March 2026 reviewer said the repair went well but that they were shocked and disappointed the company no longer offers a discount on the service when multiple units are all getting done at once. In a 2024 review, a reviewer in Leominster said ModCon came in August 2023 to service a Navian tankless water heater, told them everything was fine, and also tried to pitch a new install. If you are booking a boiler service or an annual maintenance visit, ask for the estimate before the work starts.