What We Check Before We Quote Anything
We do not guess. Readings determine the recommendation. Before we suggest a repair, our technicians run a full system evaluation:
- Electrical diagnostics: capacitor health, contactor condition, compressor and fan motor amp draw, control board function, and start component testing. We check for loose connections and heat discoloration at terminals, which are more common on rooftop units with direct sun exposure.
- Refrigerant integrity: leak detection, superheat and subcool readings in the current operating mode, coil condition, and line set inspection. On any sealed-system work, we pull a deep vacuum and verify with a micron gauge before charging. We record charge readings, airflow, and temperature split after every repair.
- Economizer operation and controls: economizer damper function, actuator condition, and controls integration checked on units where economizers are installed. Economizer faults are a common source of comfort complaints and energy waste on Las Vegas commercial RTUs.
- Airflow and static pressure: blower performance, filter condition, temperature split across supply and return, and duct leakage indicators. High Las Vegas dust loads mean filters and coils restrict airflow faster than standard intervals assume.
- Condenser section: fan motor operation, coil condition, and heat rejection capacity confirmed. Condenser fan failures on rooftop units are more frequent here due to direct sun exposure accelerating motor wear.
- Controls and thermostat: confirmed setpoints, staging, zone operation where applicable, and building management system integration where relevant
- Post-repair verification: system tested under operating conditions and performance readings documented before we close the job. Your team gets a record of what was found and what was completed.
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Common Commercial AC Repairs in Las Vegas
The Las Vegas climate drives a predictable set of failures across commercial AC systems. Dust, sustained rooftop heat exposure, hard water, and extended runtime hours all push components toward failure faster here than in most markets. These are the commercial repair calls we handle most frequently:
- Capacitor failures: the most frequent commercial call we get, particularly mid-summer after months of continuous operation. A failing capacitor causes the compressor or fan motor to struggle starting or stop working entirely.
- Contactor failure: worn or pitted contactors prevent the outdoor unit from starting. Common after long cooling seasons and more frequent on rooftop units with high heat exposure.
- Condenser fan motor failure: outdoor fan stops spinning, causing the system to overheat and trip on high pressure. Rooftop units in Las Vegas see accelerated motor wear from direct sun and heat soak.
- Refrigerant leaks: reduced cooling capacity, longer run times, and eventually compressor damage if left unaddressed. We locate the leak, repair it, and recharge to spec.
- Economizer faults: stuck dampers, failed actuators, and controls issues cause outside air to enter at the wrong volume, driving up cooling load and energy costs. Common on older RTUs that have not had regular maintenance.
- Coil restrictions: dirty condenser or evaporator coils from dust buildup reduce heat transfer and force the system to work harder. Las Vegas dust loads make this more frequent than in most markets.
- Blower motor and belt issues: reduced airflow, unusual noise, or no airflow from the indoor section. Belt-driven units require periodic tension and wear checks.
- Control board and thermostat faults: incorrect staging, failed zone controls, or no call for cooling from the building management system.
- Compressor issues: on systems where repair still makes financial sense, we assess compressor condition and give you honest numbers on repair versus replacement.
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AC Installation
If your system is past the point where repair makes financial sense, replacement is often the better path. We install all major commercial brands and handle load calculations, permitting, and commissioning as part of every job.
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Signs Your Commercial AC Needs Repair
Do not wait for a complete failure. In Las Vegas summer heat, a struggling system can go from underperforming to completely down in a short window. Call us if you notice:
- The system is running but not cooling the space to setpoint
- Airflow from supply diffusers feels weak or uneven across zones
- The outdoor unit is running but the indoor section is not delivering cold air
- The system is short-cycling, turning on and off frequently without holding temperature
- Unusual noises from the rooftop unit or indoor air handler including grinding, banging, or rattling
- Energy bills jumped without a change in occupancy or usage
- Certain zones or areas of the building stay significantly warmer than others
- The system will not start at all
- Occupants are complaining about comfort despite the thermostat being set correctly
On commercial properties, a system that is struggling but not completely down typically has a compounding effect. Short-cycling causes additional wear. Reduced airflow from dirty coils increases run time and energy cost. Catching the issue early is almost always less expensive than waiting for a complete failure.
Commercial vs. Residential AC Repair
Commercial AC repair differs from residential work in several ways that affect how we approach every job:
- Equipment type. Most Las Vegas commercial properties use rooftop packaged units rather than the split systems common in residential construction. RTUs combine the condenser, evaporator, and air handler in a single rooftop cabinet, which requires different diagnostic access and component handling than a residential split system.
- Scale and zones. Commercial systems often serve multiple zones with separate controls, thermostats, or building management system integration. A comfort complaint in one area of a building may trace to a zone control issue rather than an equipment failure.
- Downtime cost. A commercial AC failure has a direct business cost that a residential failure does not. We prioritize commercial calls accordingly and work around your operating hours where possible.
- Documentation. Property managers and business owners often need documented service records for maintenance files, lease compliance, or warranty purposes. We provide written documentation of findings and completed work on every commercial job.
If you need repair for a home rather than a commercial property
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