Commercial Boiler Repair in Glendale, CA

As Glendale’s trusted commercial boiler specialists, #1 AC Guys combines deep engineering know‑how with meticulous field craftsmanship to restore heating reliability and reduce operating costs. We understand the urgency when a boiler goes down in an office, multifamily, hospitality, retail, or medical setting—and we move quickly without cutting corners.

What we diagnose and repair

• Hydronic hot‑water and low‑pressure steam boilers (standard and condensing)
• Modulating and staged burners, ignition systems, flame sensors, and gas trains
• Primary/secondary pumps, VFDs, air separators, expansion tanks, valves, and actuators
• Heat exchangers, scale buildup, leaks, and corrosion mitigation
• Combustion air, venting/flue, draft, and condensate management
• Boiler controls, safeties, BAS/BMS integration, sensors, and setpoint optimization
• Water quality, glycol concentration, and treatment plans to prevent future failures

Every service call starts with a thorough diagnostic to isolate the root cause. Then we provide a clear repair plan, estimated timelines, and options to improve efficiency and reliability.

Signs your Glendale facility needs boiler service

• Uneven heat, temperature swings, or frequent lockouts
• Rising gas bills with no operational changes
• Kettling, banging, or whistling sounds from scaling or flow issues
• Short cycling, low water cutoff trips, or nuisance fault codes
• Visible leaks, low pressure, or air in lines
• Yellow or unstable flames, combustion‑safety alerts, or flue gas odor

If you notice any of the above, schedule a diagnostic before minor issues become major repairs.

Our diagnostic‑first process

We combine advanced measurements with hands‑on testing. That includes combustion analysis, temperature/pressure deltas across heat exchangers, flow verification, pump and valve performance checks, electrical and control testing, venting and draft assessment, and water chemistry. The result: targeted repairs that last and documentation you can share with stakeholders.

Why #1 AC Guys

• 4th‑generation family of engineers with 80+ years of engineering expertise
• Factory training: Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China)
• Proven success on complex and large‑scale commercial projects
• Clean, code‑compliant, safety‑first workmanship
• Transparent pricing, clear scopes, and strong communication
• Solutions that balance uptime, efficiency, and lifecycle cost

Our mission is healthier buildings and healthier people. For boiler systems, that means verified combustion safety, proper ventilation, and steady, clean heat that supports indoor comfort.

Code and compliance in Glendale, CA

We align repairs and adjustments with applicable local and Los Angeles County mechanical codes, utility requirements, and SCAQMD low‑NOx standards where applicable. We can coordinate permits for scope that requires inspection and provide documentation for compliance and insurance records.

Preventive maintenance that pays back

Planned maintenance prevents surprise shutdowns and stabilizes energy spend. Our PM programs include combustion tuning, safety testing, gasket and seal inspection, water treatment guidance, setpoint optimization, and seasonal changeover checks for hydronic systems. Expect fewer breakdowns, quieter operation, and longer asset life.

Energy and upgrade options

• High‑efficiency condensing boiler retrofits and right‑sizing
• Variable‑flow pumping strategies and control sequencing
• Heat‑recovery opportunities and reset schedules
• Upgraded sensors, safeties, and modern BAS/BMS integration

These improvements can cut fuel use, reduce emissions, and enhance comfort consistency across zones.

24/7 emergency response

No heat after hours? We offer rapid emergency support for Glendale facilities to restore safe operation quickly. We stabilize the system, protect equipment, and provide a clear path to permanent repair.

Service area

We proudly serve Glendale and the greater Los Angeles County, including nearby areas across Orange County, Ventura County, and Western Riverside County.

Ready to restore reliable heat?

#1 AC Guys is your partner for commercial boiler repair in Glendale—fast, precise, and engineered to last. Tell us about your system, symptoms, and schedule, and our team will deliver a clear plan and a dependable fix.

From emergency repairs to strategic upgrades, we protect your people, your property, and your energy budget—so your business can run warm, safe, and smooth.