NYC Licensed Heating Contractor • DCA #2092224-DCA • 24/7 Emergency Dispatch
Boiler Repair, Maintenance & Diagnostic Service in NYC
Precision steam and hydronic heating repairs for residential brownstones, multi-family properties, and commercial buildings across Brooklyn and Manhattan.
Boiler Systems & Service Requests We Handle
Air Rescue technicians are certified and factory-trained to diagnose, repair, and service both legacy pre-war heating infrastructure and modern ultra-high-efficiency heating plants.
Pre-War Steam Boilers
One-pipe and two-pipe low-pressure steam systems common across Brooklyn brownstones and Manhattan pre-war cooperatives. Specialists in water-hammer elimination, air vent balancing, and sight glass maintenance.
Hydronic & Radiator Heating
Closed-loop hot water systems, zoned radiant floor heating, circulator pump replacements (Taco, Grundfos), expansion tank pressure calibration, and air-purging diagnostics.
High-Efficiency Combi Units
Modulating-condensing boilers and wall-hung combination heat/domestic hot water systems (Navien, Weil-McLain, Viessmann, Lochinvar, Burnham) with AFUE ratings up to 98%.
Problems to Describe When You Call
When you contact our 24/7 dispatch desk, noting these observable indicators helps our technicians prepare the exact diagnostic instruments and OEM replacement parts before arriving at your property:
- Violent Clanging or Banging in Pipes (Water Hammer): Indicates steam condensate trapped against rising steam, faulty pitch on radiators, or malfunctioning steam air vents.
- Boiler Locking Out / Digital Error Code: Modern electronic control boards display diagnostic lockout codes (e.g., ignition failure, flame sense error, high-limit temperature sensor trip).
- Leaking Water Around Base or Pressure Relief Valve (PRV): A weeping or discharging relief valve indicates dangerous overpressurization, a failed expansion tank diaphragm, or an inoperative pressure regulator.
- Uneven Building Heating or Cold Radiators: Radiators staying cold while the boiler short-cycles frequently points to clogged air vents, defective zone valves, or faulty circulator pumps.
- Yellow Flame or Unusual Odors: A yellow burner flame or soot buildup indicates incomplete combustion and hazardous carbon monoxide risk. Shut down the unit immediately and call for emergency service.
What Happens During an Air Rescue Boiler Diagnostic Visit
We believe in complete transparency and code-compliant workmanship. Every diagnostic call follows our systematic 6-point safety and operating inspection:
1. Safety Controls & Low-Water Cutoff Test
Testing electronic and float-style low water cutoffs (LWCO) to prevent dry-firing and boiler explosion hazards.
2. Combustion & Flue Gas Analysis
Digital flue gas measurement to check CO levels, stack temperature, excess air, and draft pressure for peak efficiency and safety.
3. Pressure & Aquastat Calibration
Verifying operating steam pressure (typically 0.5 to 2.0 PSI for residential steam) and calibrating hydronic aquastats.
4. Burner & Ignition Assembly Inspection
Cleaning pilot assemblies, spark igniters, flame sensors, and inspecting gas valves for responsive modulation.
5. Circulator & Hydronic Loop Verification
Inspecting pump bearings, motor amperage draw, zone valve motor actuators, and system backflow preventers.
6. Written Diagnosis & Upfront Estimate
Before any repair begins, you receive an itemized, transparent written quote with no hidden dispatch surcharges.
Repair vs. Replacement: Objective Technical Guidance
Unlike sales-heavy contractors, Air Rescue prioritizes cost-effective, durable repairs whenever technically viable. Here is how we objectively evaluate your equipment:
When Repair Makes Sense
- Cast-iron heat exchanger sections are structurally sound with zero internal wall cracks.
- Fault is isolated to replaceable electrical or mechanical controls (flame sensor, circulator pump, aquastat, gas valve).
- System is under 15–20 years old and has been properly flushed and maintained.
- Total repair cost is substantially less than 50% of a full replacement.
When Replacement is Recommended
- Cracked cast-iron section or leaking internal boiler jacket (non-repairable ASME safety violation).
- Frequent recurrent breakdowns during severe winter freeze events with unavailable discontinued parts.
- Legacy boiler operating below 65% AFUE causing exorbitant monthly National Grid or ConEd fuel bills.
- Building owners seeking NYC Clean Heat / Con Edison energy efficiency rebates for clean modern hydronics.
Fast, Reliable Boiler Service Across NYC
From brownstones in Park Slope and Brooklyn Heights, to pre-war cooperatives on the Upper West Side and Manhattan properties, to residential townhouses, co-ops, and multi-family buildings across NYC—Air Rescue provides rapid response when your heat goes down.
Call (888) 520-6992 For Immediate Service
24 Hours a Day • 7 Days a Week • Licensed DCA #2092224-DCA
Commercial: 250,000 BTU Burnham Boiler
Heavy-duty commercial hydronic installation engineered for multi-unit heating reliability.
Residential: Hydronic Boiler Replacement
Turnkey residential boiler replacement with Taco circulator zoning and expansion tank.