Units short-cycling or tripping on high pressure
Usually dirty condenser coils, failed condenser fan motors or non-condensables in the circuit. We verify before replacing parts.
HVAC-00HVAC· Union City, Alameda County
Commercial & Industrial HVAC in Union City, CA
Golden Valley Power & Air services the heating, cooling and ventilation systems that keep commercial and industrial buildings running: packaged rooftop units, split systems, VRF, air handlers, make-up air, exhaust, chillers, boilers and the controls that tie them together. We do not do residential work. Our technicians spend their days on roofs, in mechanical rooms and in plant environments across Fremont, Hayward, Oakland and the rest of the East Bay.
- Sector
- Commercial · Industrial
- Coverage
- Union City, CA
- Scope
- Repair · PM · Install
- Residential
- Not offered
Whether you manage a single office building or a portfolio of industrial properties, you get the same approach: diagnose the actual failure, explain the options in plain terms, quote before the work, and document what was done so your maintenance records stay clean.
Commercial & Industrial HVAC Services in Union City
Many Union City industrial buildings still run their original heating and cooling equipment. We keep older rooftop units and unit heaters running safely, and when it is time we plan replacements that improve efficiency without disrupting operations.
Union City facilities include industrial and warehouse buildings in the western industrial area, food processing, beverage and packaging facilities, light manufacturing and assembly operations and more. See the full Union City service area page for everything we handle locally.
Scope of work
Commercial HVAC: what we handle
Equipment
01- Packaged rooftop units (gas/electric, heat pump, DX with economizers) from 3 to 100+ tons
- Split systems and ductless multi-zone systems for tenant spaces and server rooms
- Variable refrigerant flow (VRF/VRV) heat pump and heat recovery systems
- Air handling units, fan coils and VAV terminal units with reheat
- Make-up air units, kitchen and process exhaust, and building pressurization systems
- Air-cooled and water-cooled chillers, cooling towers and pumps
- Hydronic and steam boilers, unit heaters and infrared heaters
- Building automation and DDC controls, thermostats and economizer controllers
Repair & troubleshooting
02- Compressor, condenser fan and blower motor failures
- Refrigerant leak search, repair, evacuation and charge by weight
- Economizer, damper actuator and outside-air control repair
- Heat exchanger, gas valve, igniter and burner troubleshooting
- Variable frequency drive (VFD) faults and motor replacement
- Control wiring, sensors, contactors, capacitors and relays
- Airflow and comfort complaints traced to duct, balancing or zoning issues
Maintenance
03- Scheduled filter changes and belt replacement matched to your run hours
- Coil cleaning, condensate drain treatment and drain pan inspection
- Refrigerant circuit checks, superheat/subcooling and pressure logging
- Electrical inspection: amp draws, terminal tightness, contactor condition
- Economizer function testing and outside-air verification
- Seasonal heating start-up and combustion checks
Installation & replacement
04- Like-for-like rooftop unit replacements including curb adapters and crane coordination
- Split system and VRF installations for tenant improvements
- Air handler, fan and VFD retrofits for energy and reliability
- Mechanical design-assist for general contractors on commercial build-outs
Diagnostics
Common failures and what they mean
Uneven temperatures across a floor plate
Often a VAV box, actuator or zone sensor problem rather than the rooftop unit itself. We trace from the space back to the equipment.
Economizers stuck open or closed
A very common source of high energy bills and comfort complaints in the Bay Area's mild climate. Title 24 requires functioning economizers on most units.
Recurring compressor failures
Repeat failures point to a root cause: liquid floodback, low airflow, electrical imbalance or a refrigerant issue. We find it instead of swapping compressors again.
FAQ
Frequently asked questions
Dispatch
Request commercial hvac in Union City
Tell us about the facility and the equipment. Attach a nameplate photo if you have one.
Nearby
Commercial HVAC near Union City
Also
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Packaged rooftop heating and cooling units from 3 to 100+ tons, including crane replacements.
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