Fullerton Commercial Boiler Repair for AC PRO Systems

When heat or hot water is critical to your operation, delays aren’t an option. #1 AC Guys specializes in commercial boiler repair for properties in Fullerton, with deep experience servicing systems sourced through AC PRO and other major distributors. From school campuses and medical offices to hospitality and light industrial spaces, we restore performance fast while safeguarding safety, efficiency, and compliance.

What we repair and optimize

• Condensing and non‑condensing boilers: heat exchangers, burners, ignition, flame sensors, and condensate management
• Hydronic loops: primary/secondary piping, pumps, air separators, expansion tanks, valves, PRVs, strainers, glycol systems
• Controls and BMS: lead/lag sequencing, reset curves, sensors, VFDs, integration with BAS/BMS
• Combustion and venting: gas trains, regulators, flue piping, draft, O2/CO tuning, emissions checks
• Water quality: scale mitigation, corrosion control, filtration, treatment programs

Our engineers perform thorough diagnostics, including combustion analysis, delta‑T checks, flow verification, and electrical testing to pinpoint root causes—not just symptoms.

AC PRO–supplied systems, serviced with speed

We work daily on equipment and components commonly distributed by AC PRO, leveraging local parts access for faster turnarounds. Whether you need a pump swap, control board replacement, or gasket kit, we move quickly to minimize downtime and protect your tenants and processes.
Note: We service AC PRO–supplied equipment and many leading boiler brands. Our training includes manufacturers such as Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China).

Safety, compliance, and performance

Every repair follows California codes and best practices. We verify gas pressure, perform leak and combustion safety checks, confirm proper venting, and document results. Where applicable, we align with Title 24 energy standards and local AQMD guidance. The outcome: a safer plant room, lower fuel use, and longer equipment life.

Our process

• Assessment: Interview site staff, review history, inspect system layout, and verify water chemistry.
• Diagnostics: Combustion analysis, sensor and control testing, flow and delta‑T verification, and mechanical inspection.
• Repair: OEM‑grade parts, precise calibration, and control optimization (reset curves, staging, OAT sensors).
• Validation: Run tests under load, confirm setpoints, verify alarms/safeties, and provide a clear service report.
• Prevention: Tailored maintenance with seasonal startups, water treatment checks, and scheduled inspections.

Common issues we solve

• Lockouts from ignition, flame proving, or control faults
• Inefficient operation due to fouled heat exchangers or poor combustion tuning
• No heat or uneven heat from air‑bound loops or failed pumps
• Short cycling from sensor errors, improper staging, or oversized equipment
• Condensate leaks and corrosion in condensing systems

Engineered reliability for complex facilities

As a fourth‑generation family of engineers with 80+ years in engineering, we excel on large and intricate projects—multi‑boiler lead/lag plants, variable primary systems, and mixed‑use buildings. We fine‑tune control logic, balance hydronic circuits, and integrate with building automation to stabilize comfort and reduce operating costs.

Healthy air, healthy buildings

Our mission is healthy indoor environments for healthy lives. Stable hydronic heat supports better IAQ by enabling proper ventilation and humidity control across your HVAC system. We repair the boiler, then optimize the whole ecosystem for occupant comfort and productivity.

Service area and response

Rapid dispatch in Fullerton, plus nearby cities such as Anaheim, Brea, Placentia, Buena Park, and La Habra. We also serve Los Angeles County, Orange County, Ventura County, and Western Riverside County. Same‑day and 24/7 emergency options are available to keep your operation running.

Transparent pricing and long‑term value

You’ll get clear diagnostics, options that fit your budget, and guidance on repair versus replacement. When replacement is the smarter move, we design efficient, right‑sized solutions and coordinate permitting and start‑up for a smooth transition.

Preventive maintenance that pays back

• Seasonal burner tune‑ups and combustion optimization
• Water treatment monitoring and exchanger descaling
• Pump, seal, and valve inspections with predictive replacements
• Controls verification, sensor calibration, and alarm testing
• Thermal imaging and trend analysis for early fault detection

Proactive care reduces fuel burn, cuts emergency calls, and extends equipment life—delivering measurable ROI.

Get service now

Need commercial boiler repair in Fullerton today—especially on AC PRO–supplied systems? Call #1 AC Guys. We’ll restore heat quickly, document everything we do, and set you up for reliable, efficient operation all season long.