D/E/F Services Group, LTD

D/E/F Services Group, LTD is an Old Saybrook company that describes itself as a multi-trade service and installation company handling mechanical, electrical and plumbing work for building systems. On Google it holds 4.5 stars from 37 ratings. A 2024 customer said D/E/F installed mini-splits in their home, with 2 outside units mounted to the house and 7 heads inside, and that Justin worked by himself to get the installation completed while the weather was not cooperating. A 2024 customer said Justin installed and repaired their forced air furnace and checked on it a couple days after. A 2024 customer credited John and team with a boiler repair. A 2026 customer wrote that Sam from D/E/F found the problems and fixed them, and that by spring there were no more leaks. A 2023 customer said someone came out to quote an AC and furnace replacement, then never dropped off the quote despite many calls over almost a month. A 2023 customer said the manager, Jason, yelled and swore at them when they called about a job they said the company had screwed up, refused to send someone to fix it, and that they were overcharged.