Steam Boiler Repair & Service in New York City
Steam Heating Contractor — 24/7 Emergency Response
- ✓NYC Steam Specialists
- ✓All Steam System Types
- ✓24/7 Available
- ✓Same-Day Service
Steam boiler systems are the backbone of heating in thousands of older NYC buildings — brownstones, pre-war apartments, co-ops, and townhomes across Manhattan, Brooklyn, and The Bronx. They're reliable when properly maintained, but require a specialist when they break down.
Legacy NYC Mechanical is one of New York City's leading steam boiler contractors. Our technicians understand the unique characteristics of one-pipe and two-pipe steam systems, and we carry the specialized parts — including steam traps, air vents, pressure controls, and low-water cutoffs — to get your steam system working right.
Steam Boiler & Steam Heating Services
- Steam Boiler Repair — full diagnosis and repair of all steam boiler issues
- Steam Boiler Service — annual maintenance, inspection, and cleaning
- Steam Boiler Contractor — experienced contractor for all NYC steam system work
- Steam Boiler Replacement — full system replacement with quality brands
- Steam Boiler Installation — professional installation of new steam boiler systems
- Steam Heating Repair — repair all components of steam heating systems
- Steam Radiator Repair — fix radiators that aren't heating, banging, or leaking
- Steam Radiator Not Heating — diagnose and resolve radiators with no heat
- Steam Boiler Leaking — identify and fix water or steam leaks
- Steam Boiler No Heat — emergency response for complete heating failure
- Steam Boiler Maintenance — keep your steam system efficient and reliable
- Steam Trap Repair — replace faulty steam traps causing cold radiators or banging
- Steam Pipe Repair — address leaking, corroded, or damaged steam pipes
Common Steam Boiler Problems We Fix
Steam Boiler Not Heating
Cause: Failed steam traps, blocked air vents, improper water level, or boiler control failure.
Fix: We inspect the full system — boiler, traps, vents, and distribution pipes — to find the cause.
Steam Radiators Banging or Knocking
Cause: Water trapped in the steam pipe (water hammer), improperly pitched pipes, or bad steam traps.
Fix: Steam trap replacement, pipe re-pitching, and system re-balancing.
Steam Boiler Leaking
Cause: Corroded sections, failed gaskets, loose fittings, or cracked heat exchanger.
Fix: Leak location, component repair or replacement, full system pressure test.
Steam Boiler Cycling On and Off Too Frequently
Cause: Improper pressure settings, faulty pressuretrol, or blocked near-boiler piping.
Fix: Pressure adjustment, pressuretrol calibration, piping inspection.
Only Some Radiators Heat
Cause: Air-bound radiators, failed air vents, closed zone valves, or unbalanced system.
Fix: Air vent replacement, system balancing, steam trap inspection.
Steam Boiler Repair FAQ
Steam System Not Working? We Can Help.
Ready to Restore Heat or Hot Water?
Available 24/7 for emergency boiler and water heater service across NYC.