Commercial Boiler Repair in Ontario, CA for AC PRO Systems

When your Ontario facility relies on AC PRO commercial boilers, you need an engineering‑driven partner who solves problems the first time. #1 AC Guys is a fourth‑generation family business with 80+ years of engineering experience, built in Southern California and focused on complex commercial heating plants. We diagnose, repair, and optimize AC PRO hydronic and gas‑fired systems for safe, reliable heat and predictable operating costs.

What makes our Ontario commercial boiler repair different

• Engineering‑first diagnostics: We trace faults to the source—fuel, air, water flow, controls, or heat transfer—using instruments and data.
• AC PRO expertise: Deep familiarity with AC PRO boilers, hydronic components, and integration within larger mechanical plants.
• Complex project readiness: From multi‑boiler lead/lag plants to large air handlers and process loads, we handle challenging sites.
• Safety and compliance: Work practices aligned with California energy codes and local AHJ requirements.
• Clear pricing and communication: Findings, options, and costs explained before we proceed.
• Preventive approach: Repairs that address symptom and cause, backed by maintenance plans to prevent repeat failures.

AC PRO commercial boiler services we provide

• Rapid diagnostics and repair for ignition issues, nuisance lockouts, short cycling, and low efficiency
• Emergency restoration to stabilize heat and protect operations
• Combustion analysis and tuning for safe, efficient burn and lower emissions
• Heat exchanger inspection and repair strategies to address scaling, fouling, or damage
• Pump, valve, and actuator service for correct flow and delta‑T across loops
• Controls troubleshooting (sensors, safeties, BAS/BMS integration, staging, and setpoint logic)
• Water quality management recommendations (air removal, treatment, and filtration) to extend equipment life
• Retrofit and replacement planning when repair is not the best lifecycle choice
• Startup, recommissioning, and performance verification after major repairs
• Documentation for maintenance logs and compliance records

Our proven process

1. Intake and safety. We gather fault history, secure the area, and verify fuel, power, water, and ventilation.
2. Root‑cause testing. Instruments guide combustion checks, control logic reviews, circulation measurements, and thermal assessments.
3. Findings and options. You receive a clear report with repair paths, costs, and any code‑related considerations.
4. Precise repair. We implement the approved plan and validate performance under load.
5. Preventive plan. We recommend maintenance intervals to protect uptime and efficiency.

Industries and facilities we support in Ontario

• Warehouses and logistics near Ontario International Airport
• Manufacturing and light industrial plants
• Healthcare and medical offices
• Hospitality and retail centers
• Schools, campuses, and public facilities
• Office buildings and mixed‑use properties

Serving Ontario and nearby Southern California

We are a Los Angeles–based team serving Ontario, CA and surrounding communities across Los Angeles County and nearby areas including Orange County, Ventura County, and Western Riverside County (Inland Empire). Common Ontario ZIP codes we serve include 91761, 91762, and 91764.

Training and quality you can trust

Our engineers have trained directly at the factories of Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China). That factory‑level rigor shows in how we analyze systems, commission repairs, and verify results. We bring the same disciplined approach to AC PRO commercial boiler repair—careful measurements, thoughtful settings, and documentation that stands up to scrutiny.

Healthy buildings, better outcomes

Reliable hydronic heat supports stable indoor conditions and healthier indoor air. Our mission is simple: healthier air for a healthier life—achieved through safe combustion, correct circulation, and clean, well‑balanced mechanical systems.

Schedule AC PRO boiler repair in Ontario

Facing alarms, lockouts, or rising energy bills? Get a fast site visit from #1 AC Guys. We will diagnose the issue, present clear options, and get your AC PRO boiler back to peak performance with minimal downtime. Call us today or send a message to schedule service, request maintenance, or obtain a second opinion on a complex boiler problem in Ontario, CA.