Commercial AHU (Air Handling Unit) Repair in Fullerton — AC PRO

Deep-Dive Diagnostics for Commercial AC PRO Air Handlers

We don’t guess—we verify. Our process combines airflow measurements, static pressure mapping, motor and VFD trending, thermal imaging, and controls analysis to locate failures and uncover risks before they disrupt your operations. Whether your AC PRO AHU serves open office floors, labs, classrooms, retail, or industrial zones, we restore capacity, improve stability, and protect equipment life while keeping energy use in check.

Common diagnostic steps include: baseline airflow and ΔP readings, drive and motor current testing, coil temperature split checks, economizer and damper calibration, sensor validation (supply/return/mixed air), drain and pan inspection, and sequence-of-operations review through your DDC/BMS. If your AHU is tied to chilled water or DX circuits, we coordinate with plant or condensing equipment to ensure the entire chain works as designed.

AC PRO AHU Problems We Fix—Fast and Right

• Blower failures: bearings, belts, sheaves, shaft alignment, wheel balance
• Motors and drives: ECM and induction motors, VFD trips, parameter tuning, soft starts
• Controls and sensors: temperature, humidity, CO2, pressure, airflow stations, freeze stats
• Economizers and dampers: actuator replacement, linkage repair, leakage reduction, calibration
• Coils and heat exchange: DX and chilled-water coils, cleaning, fin straightening, leak checks
• Drainage and IAQ: pan retrofits, drain line clogs, microbial prevention, UV-C add-ons
• Filtration and pressure: MERV upgrades, differential pressure issues, negative/positive balance
• Cabinet integrity: air leaks, access seals, insulation repair, vibration and noise control

If your air handler is short-cycling, tripping on low temperature, struggling to maintain setpoint, or causing humidity swings, our team isolates the root cause and restores stable operation to protect occupants, inventory, and processes.

Healthy Air for Healthy Lives

Comfort is just the start. We optimize ventilation rates, filtration efficiency, and pressurization to support indoor air quality (IAQ) targets in line with your use case and local codes. From MERV‑13 retrofits to UV‑C inactivation, coil sanitation, and CO2‑based demand control ventilation, we tune your AC PRO AHU for clean, balanced air that supports productivity and wellness.

• MERV‑13/14 filtration strategies with ΔP monitoring
• UV‑C at coils to reduce biofilm and maintain heat transfer
• Demand control ventilation to save energy and uphold IAQ
• Humidity management to limit mold and static issues

Preventive Maintenance for AC PRO AHUs

A strong PM program reduces surprises, energy waste, and downtime—especially across multi‑tenant and mission‑critical spaces. We offer tailored maintenance plans for AC PRO air handlers serving Fullerton properties and regional portfolios.

• Quarterly inspections of belts, bearings, and alignment
• Coil cleaning and condensate treatment to protect capacity
• VFD parameter checks, trend review, and firmware updates
• Damper and economizer calibration, leakage tests
• Filter changes by ΔP threshold, not just calendar dates
• Sensor validation and DDC sequence testing

What to Expect from #1 AC Guys

• Assessment: Same‑day or scheduled visit, safety and code review
• Diagnostics: Instrumented testing and BMS data analysis
• Plan: Clear scope, parts, timeline, and upfront pricing
• Repair: Code‑compliant work with photos and readings
• Verification: Performance testing and sign‑off
• Follow‑Up: Report with recommendations and PM options

Our Engineering DNA

#1 AC Guys is a 4th‑generation family of engineers with 80+ years in engineering. Our team has been trained at the factories of Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China). That background powers our ability to troubleshoot complex commercial systems, integrate with controls, and solve problems other contractors walk away from.

Codes, Safety, and Compliance

Repairs are completed to manufacturer guidance and applicable standards, with attention to California Title 24, CALGreen, SCAQMD best practices, and OSHA lockout/tagout. We document settings, verify airflow and ventilation rates, and help facilities teams align with internal SOPs and audit requirements.

Fullerton and Southern California Coverage

We prioritize commercial AHU service in Fullerton and throughout Orange County, with broader coverage across Los Angeles County, Ventura County, and Western Riverside County. Multi‑site operators benefit from consistent standards, documentation, and KPIs across portfolios.

Industries We Serve

• Office, retail, and mixed‑use
• Healthcare clinics and senior living
• Education and public buildings
• Hospitality, entertainment, and venues
• Warehousing, light manufacturing, and labs
• Houses of worship and community facilities

Transparent Value

You get engineering‑grade diagnostics, clear communication, and dependable scheduling. Parts and labor carry straightforward warranty terms, and every job includes a post‑repair performance summary your team can keep on file.

Ready to Restore Your Air Handler?

If your AC PRO air handling unit in Fullerton needs expert attention, we’re ready. Book an assessment, stabilize performance, and elevate IAQ with the commercial AHU specialists at #1 AC Guys—where the mission is healthy air for healthy lives.