Check controls before calling
Confirm thermostats, schedules and the building management system are calling for heat or cooling, and that no one changed setpoints or occupancy schedules.
Commercial HVAC down or tenants losing heating or cooling?
Commercial HVAC problems range from one failed rooftop unit to a building-wide control outage. Call 833-877-1717 with the address, the systems involved and the impact on operations. RepairNowUSA connects the request. An independent commercial HVAC provider does the work.
Am I in the right place?Yes for rooftop units, split systems, boilers, chillers or controls failing in offices, retail, restaurants, healthcare, schools or multifamily buildings.
Is this urgent?Yes when occupants, operations, food, medicine or equipment are affected.
What do I do next?Call 833-877-1717 with the ZIP code, building type, and which systems are down.
Cooling only: commercial AC. Heating only: commercial heating. Rooftop units: RTU repair.
RepairNowUSA editorial review · Last substantively reviewed October 14, 2026 · Review standards
What helps the provider most
Map what is down
List which zones, floors or suites are affected and which units serve them. One failed rooftop unit and a building-wide controls outage need different technicians.
Protect people, equipment and pipes
In heat, shut down non-essential equipment and protect server rooms. In freezing weather, watch for pipes at risk. Keep staff off roofs and out of mechanical rooms.
Keep staff off roofs
Rooftop equipment involves fall and electrical hazards. Leave inspection to the provider.
Typical commercial HVAC issues
One rooftop unit down
A single failed rooftop unit leaves its zone hot or cold while the rest of the building is fine. See rooftop unit repair.
Building-wide outage
When every zone fails at once, suspect power, the building management system, a central plant (chiller or boiler) or a shared control signal.
Tenant comfort complaints
Hot and cold spots often come from failed dampers, VAV boxes, thermostats or duct problems rather than the main equipment. See thermostat and controls repair.
Water from HVAC equipment
Clogged condensate drains and failed curb flashing leak into ceilings below. See commercial roof leak repair.
What to have ready when you call
- Property ZIP code and building type
- Which zones, floors or suites are affected
- Equipment type: rooftop units, split systems, chiller, boiler or VRF
- Whether controls or the building management system show alarms
- Roof or mechanical room access and an on-site contact
- Who can authorize work and any vendor requirements, such as a COI, W-9 or NTE
How commercial HVAC repair usually works
- Triage. The technician confirms whether the failure is one unit, a central plant or the controls.
- Diagnosis. Power, controls, motors, compressors, refrigerant circuits and heat sections are tested.
- First-visit repair. Common parts such as capacitors, contactors, belts, igniters and sensors are often replaced the same visit.
- Parts and temporary conditioning. Compressors, boards and brand-specific parts may need ordering. Portable cooling or heat can protect critical spaces meanwhile.
- Report. Ask for a written summary of findings, work done and recommended next steps for your records and tenants.
Many commercial technicians work on major equipment brands, but central plants such as chillers and large boilers often need specialists. Describe the equipment when you call.
What happens when you call RepairNowUSA
- Describe what is happening in plain words and give the property ZIP code. You do not need to know which trade to ask for.
- RepairNowUSA checks for a participating independent provider who handles commercial HVAC repair in that area.
- If one is available, you are connected. The provider confirms timing, access, scope and price with you before any work.
- The provider, not RepairNowUSA, diagnoses and performs the repair.
RepairNowUSA is a referral and connection service. Provider availability and response times vary by location, time and demand, and are not guaranteed. Before you approve work, ask what was found, the price, the timing and what is not included.
Call 833-877-1717Commercial HVAC questions
Can you handle multiple locations?
RepairNowUSA can take requests for different sites. Provider coverage depends on each site’s ZIP code, so give each address when you call.
Does RepairNowUSA offer service contracts?
No. RepairNowUSA connects requests to independent providers. Ask the provider directly about preventive maintenance agreements.
Why is only part of the building hot?
Usually one rooftop unit, a zone damper, a VAV box or a thermostat has failed. A building-wide problem points to power, controls or a central plant.
What should we do about the server room?
Shut down non-essential equipment, open doors if it is safe, and tell the provider it is a critical space so portable cooling can be considered.
Can work be done after hours?
Often. Many providers schedule non-urgent work after hours to limit disruption. Ask when you call.
Can I call at night or on a weekend?
Yes. You can call 833-877-1717 at any time, including nights, weekends and holidays. Whether an independent provider can come out right away depends on your ZIP code, the time and provider capacity, so availability is not guaranteed.
Authoritative references
These public sources give general safety context. They do not replace an on-site evaluation, and RepairNowUSA does not perform the work.