Commercial Variable Air Volume (VAV) Box Repair in Santa Monica

What a VAV Box Does—and Why Precise Repair Matters

Variable Air Volume (VAV) boxes regulate airflow and temperature for each zone in your building. When components fail—actuators, dampers, sensors, reheat coils, or control modules—occupants feel it: hot/cold complaints, drafts, noise, poor air quality, and rising energy bills. Our mission is simple: restore healthy air and stable comfort while optimizing efficiency.

Common VAV Problems We Solve

• Stuck or hunting dampers and failed actuators causing unstable temperatures
• Drifting airflow/temperature sensors leading to poor control and comfort
• Electric or hydronic reheat coil faults (elements, valves, safeties, wiring)
• Fan‑powered VAV issues: worn motors, ECM drives, bearings, and noise
• DDC/BAS control errors, misconfigured setpoints, and failed I/O
• Airflow imbalance, pressure issues, or insufficient ventilation

We service single‑duct, dual‑duct, series and parallel fan‑powered VAV boxes and integrate with your building automation strategy.

Our Engineering‑Grade Diagnostic Process

We don’t guess—we measure. A structured diagnostic reveals the root cause, not just the symptom.

• Interview and history review: complaints, schedules, and prior work
• Visual and mechanical inspection of actuators, linkages, dampers, and wiring
• Airflow verification with calibrated instruments; setpoint and sensor checks
• Electrical testing on motors, reheat circuits, valves, and safeties
• Controls analysis: BAS trends, sequences, and device health
• Functional test and recalibration to restore stable control and comfort

Deliverables include documented findings, prioritized repair options, and recommendations to improve reliability and energy performance.

Repairs and Optimization We Perform

• Actuator and damper replacement, linkage repair, travel calibration
• Sensor replacement and recalibration (airflow, temperature, pressure)
• Reheat restoration: electric elements, contactors, relays, fuses, hydronic valves
• Fan‑powered box service: motor/ECM replacement, bearings, noise mitigation
• Controls fixes: device replacement, re‑wiring, setpoint tuning, sequence adjustments
• Airflow balancing assistance to align CFM with design and occupancy needs

We align our work with recognized industry best practices to help reduce energy use while protecting indoor air quality.

Why #1 AC Guys

• Fourth‑generation engineering family with 80+ years of engineering expertise
• Factory‑trained by Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China)
• Specialists in complex commercial systems and large multi‑zone projects
• Clear diagnostics, transparent pricing, and durable repair strategies
• Mission‑driven: healthy indoor air for healthier lives

We combine deep engineering knowledge with practical field experience to deliver dependable results for property managers, facility teams, and owners.

Symptoms That Signal VAV Repair

• Hot/cold spots, frequent hot‑desk moves, or tenant complaints
• Boxes that never satisfy or run continuously
• Unusual fan noise, vibration, or rattling
• High energy bills despite mild weather
• Poor air movement, drafts, or stale air
• BAS alarms, communication faults, or offline controllers

Addressing these early prevents bigger failures and protects comfort, productivity, and IAQ.

Upgrades for Reliability and Efficiency

• High‑accuracy sensors to reduce drift and improve control
• ECM fan upgrades in fan‑powered boxes for quieter, efficient operation
• Improved insulation and sealing to reduce heat gain/loss and noise
• Control sequence tuning to match occupancy, schedules, and ventilation needs

Small improvements yield outsized returns in comfort and operating cost.

Where We Work

Based in Los Angeles, we proudly serve Santa Monica and the wider region: Los Angeles County and nearby areas including Orange County, Ventura County, and Western Riverside County. Whether it’s a Class‑A office, medical facility, school, retail center, or hotel, we’re equipped for complex commercial VAV systems.

Our Commitment to Healthy Air

Healthy indoor air is our core mission. We verify airflow delivery, improve ventilation stability, and ensure reheat operates as intended—helping your building meet comfort and IAQ goals while avoiding unnecessary energy waste.

Get Your VAV System Back in Balance

If your Santa Monica building struggles with VAV issues, #1 AC Guys can help. Expect fast response, clear communication, and engineering‑grade repairs that last.
Request a diagnostic visit today to restore comfort, protect IAQ, and reduce operating costs.