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Commercial HVAC Repair Across the NYC Metro
One number for every system in your building. Com+ Mechanical repairs rooftop units, chillers, boilers, VRF, air handlers, cooling towers, refrigeration and controls — with 24/7 response for property managers, building owners and facility teams across the five boroughs, Long Island, Westchester, northern NJ and Stamford.
Building HVAC Problems We Resolve
Whole zones or floors with no cooling or heat
Traces back to a failed rooftop compressor, a tripped chiller, a locked-out boiler, or a stuck VAV/zone valve. We isolate the failed system across the airside and control path rather than resetting and hoping it holds.
Equipment short cycling or repeatedly locking out
Pressure-switch, control-board, sensor or flow faults — often paired with dirty coils, low refrigerant or an oversized unit. Short cycling spikes energy use and shortens compressor and burner life.
Refrigerant leaks and declining cooling capacity
Leaking coils, fittings, Schrader cores or aging R-22 charges. We electronically leak-detect, repair the source, and recover and recharge under EPA Section 608 — not just top off and rebill.
Tenant comfort complaints with no obvious fault
Economizer dampers stuck open, failed outdoor-air or zone sensors, drifting BAS sequences, or unbalanced airflow. We diagnose at the controls and airside, not just the equipment.
Water leaks, flooding or staining in mechanical spaces
Clogged condensate drains, rusted drain pans, failed condenser-water valves, or pump-seal and piping leaks. Left alone these cause interior damage, mold risk and tenant claims.
Recurring failures on equipment past its service life
Compressors, heat exchangers and motors that keep failing on aging units. We quantify run hours and repair history so you can decide between another repair and a planned capital replacement.
Whole-Building HVAC Repair, One Accountable Vendor
A commercial building rarely runs on a single piece of equipment. A typical NYC property stacks packaged rooftop units, a central chiller plant or VRF system, hydronic or steam boilers, air handlers and fan-coils, cooling towers, exhaust and makeup-air units, walk-in refrigeration and a building automation system tying it all together. When any link in that chain fails, tenants feel it — and the fix often crosses mechanical, electrical and controls disciplines at once. Com+ Mechanical is the single commercial contractor you call for all of it. Our technicians diagnose the actual root cause across refrigeration, hydronic, gas-fired, airside and control circuits, document findings with photos for your records, and give building staff a clear repair-versus-replace path. Whether it is one rooftop unit on a retail box or a full plant serving a Class A office tower, you get one point of contact, code-compliant work, and equipment logged and verified before we leave the roof or mechanical room.
What Our Commercial HVAC Repair Covers
Why Property Managers Call Com+ for HVAC Repair
Our Simple Process
From call to comfort in 4 easy steps
Dispatch & site assessment
We confirm building access, COI requirements and equipment details, then get the right technician to the roof, plant or mechanical room — fast when it is an emergency.
Root-cause diagnosis
We test the failed system under load across refrigeration, hydronic, electrical, airside and control circuits to find the true cause, not just the symptom that tripped the alarm.
Scope, quote & approval
You get a documented scope with photos and a clear price before work proceeds. No surprise invoices and no scope creep without sign-off.
Repair & verify
We complete the repair, verify performance across a full operating cycle, and leave each unit logged and labeled for your maintenance records.
Types of Systems We Install
Packaged & Rooftop Systems
Gas/electric and heat-pump packaged rooftop units that carry the load for most retail, office and mixed-use buildings.
- •Compressor & economizer diagnostics
- •Gas-heat & heat-exchanger safety inspection
- •Curb, condensate & airflow correction
Central Plant — Chillers, Boilers & Towers
Air- and water-cooled chillers, hydronic and steam boilers, pumps and cooling towers serving larger buildings and campuses.
- •Compressor & refrigerant management
- •Burner, control & heat-exchanger service
- •Condenser-water & pump troubleshooting
Airside, VRF & Controls
Air handlers, fan-coils, VAV boxes, VRF systems and the BAS that sequences them across zones and floors.
- •Motor, coil & actuator repair
- •VRF reversing-valve & refrigerant diagnostics
- •BAS sequence & sensor correction
The Com+ Mechanical Difference
Commercial-only focus
We work on packaged, central-plant and VRF equipment every day across NYC — not the occasional residential split system.
All systems, one contractor
Rooftop, chiller, boiler, VRF, airside and controls under one roof means no finger-pointing between trades when a fault crosses disciplines.
Built for property managers
Clear documentation, a single point of contact, and coordination with your building staff, tenants and COI requirements.
Whole-portfolio coverage
One vendor for one building or a hundred across multiple sites, boroughs and counties — with consistent reporting.
Transparent Pricing
No fees. No surprises. Just honest service.
Repair
Approved repair scoped to the failed components and equipment.
- Parts and labor scoped to the fault
- Performance verified across a full operating cycle
- Equipment logged and labeled
- Workmanship backed
Maintenance Agreement
Planned, whole-building maintenance to cut emergency failures across your portfolio.
- Scheduled filter, belt, coil & combustion service
- Priority emergency response
- Portfolio-wide reporting
- See our commercial maintenance plans
Pricing shown is a structure, not a quote. Final pricing is confirmed in writing after assessment.
Own a Commercial Property?
Business+ plans start at $499/year — includes 2 rtu tune-ups, 10% off all services, and priority scheduling.
Equipment & Brands We Service
Factory-trained technicians for all major HVAC manufacturers
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Don't see your brand? We service all major manufacturers! Call us to confirm.
Proudly Serving Nassau County
Fast, reliable service in your neighborhood
Frequently Asked Questions
Get answers to common questions about our services
Do you offer 24/7 emergency commercial HVAC repair in NYC?
Yes. Building failures don't wait for business hours, so we provide 24/7 emergency commercial response across the five boroughs, Long Island, Westchester, northern NJ and Stamford.
What types of commercial HVAC systems do you repair?
All of the major systems in a commercial building — packaged rooftop units, air- and water-cooled chillers, cooling towers, hydronic and steam boilers, VRF and split systems, air handlers, fan-coils and VAV boxes, makeup-air and exhaust units, commercial refrigeration, and the building automation system that controls them.
Can one contractor really cover every system in our building?
Yes — that's the point of calling Com+. When a fault crosses mechanical, electrical and controls, a single accountable vendor diagnoses end to end instead of three trades pointing at each other. It also means one point of contact and one consistent record of every repair.
Can you service HVAC across multiple buildings in our portfolio?
Yes. We support property-management companies and owners with multi-site portfolios, giving you one vendor, consistent documentation and coordinated scheduling across buildings, boroughs and counties.
How do you handle COIs and building access?
We coordinate roof and mechanical-room access, tenant notice and certificate-of-insurance requirements before mobilizing, so the technician isn't turned away at the door.
Will repairs help with Local Law 97 and energy costs?
A correctly running, well-maintained system uses less energy, which directly supports your building's emissions targets. For aging or repeatedly failing equipment, we'll show how efficient replacement options affect operating cost and your Local Law 97 exposure.
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Building System Down? Call One Number.
Tell us the building and the symptom — we'll get the right technician to the roof, plant or mechanical room and get your space conditioned again. Serving property managers, building owners and facility teams across the NYC metro, 24/7.
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