Commercial Chiller Repair in Fullerton, CA

When your building depends on a chiller, you need a partner who can diagnose and resolve issues quickly and correctly. At #1 AC Guys, we pair advanced engineering with practical field experience to restore reliability, efficiency, and comfort for Fullerton facilities of every size.

Our Commercial Chiller Expertise in Fullerton

We service air‑cooled and water‑cooled systems across offices, healthcare, hospitality, education, manufacturing, retail, and distribution. Our team is trained at the manufacturing facilities of Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China), and Hier (China). Whether you operate centrifugal, screw, or scroll compressors, we bring methodical diagnostics to the entire plant—chillers, pumps, valves, cooling towers, VFDs, heat exchangers, and controls.

We specialize in complex and large‑scale projects other contractors avoid, including unstable loops, chronic nuisance trips, recurring leaks, and performance shortfalls under part‑load or peak‑load conditions.

Fast, Accurate Diagnostics

We use data‑driven testing to isolate root causes and avoid repeat failures:

• Refrigerant circuit evaluation: superheat/subcooling, leak detection, and oil analysis
• Water‑side assessment: delta‑T, flow verification, strainers, tube fouling, and treatment coordination
• Electrical and controls: contactors, sensors, safeties, VFD tuning, BAS setpoints, and alarming
• Mechanical integrity: bearings, seals, vibration, alignment, and expansion devices

This approach minimizes downtime while protecting equipment life and energy budgets.

Common Chiller Repairs We Perform

• Refrigerant leak detection and repair, evacuation, charging, and dehydration
• Tube cleaning, eddy‑current inspection, and heat‑transfer restoration
• Compressor service for centrifugal, screw, and scroll designs
• Oil and refrigerant management: oil sampling, moisture mitigation, and filter‑drier replacement
• Expansion valves, sensors, actuators, and electronic controls replacement
• Pump and VFD repairs, hydronic balancing, and valve replacements
• Cooling tower service: fan motors, gearboxes, fill media, and basin cleaning

Every repair is documented with readings before/after, so you know exactly what changed and why it matters.

Signs Your Chiller Needs Service

• Rising energy bills with no change in occupancy
• Poor cooling at peak demand or frequent short‑cycling
• High approach temperatures or abnormal delta‑T
• Alarms and shutdowns tied to pressure, flow, or temperature
• Visible leaks, unusual vibration, or noise

If you notice these symptoms in Fullerton, call us early—small issues become costly fast.

Our Process

We align our work with your operations to reduce disruption:

• Discovery and site walk: understand comfort issues, loads, and controls
• Testing and trending: capture data under real operating conditions
• Root‑cause report: clear findings with prioritized options and ROI
• Precision repair: executed to spec with safety and cleanliness in mind
• Optimization: setpoints, staging, and scheduling for savings and stability

We can coordinate with your water‑treatment provider and building automation team for seamless results.

Healthy Air and Reliable Cooling

Our mission is healthy indoor air for a healthy life. In commercial buildings, chillers play a critical role: stable temperature and humidity support ventilation strategies that reduce contaminants and improve comfort. We make sure your chiller plant supports IAQ goals without sacrificing efficiency.

Energy and Reliability Upgrades

Beyond repairs, we can modernize your plant for measurable gains:
• Variable primary flow and pump optimization
• Controls re‑sequences and demand‑based staging
• Heat‑exchanger cleaning and water‑side improvements
• Sensor calibration and alarming logic
• Retrofit options tailored to budget and lifecycle

We provide practical guidance so you can plan upgrades that fit your timeline and capital strategy.

Industries We Serve in and around Fullerton

• Corporate offices and campuses
• Healthcare and medical offices
• Manufacturing and labs
• Hospitality and entertainment
• Education and municipal facilities
• Retail centers and warehouses

From Downtown Fullerton to business parks near the 91 and 57, we respond quickly and work cleanly.

Service Area and Scheduling

We proudly serve Fullerton and Orange County, and we also cover Los Angeles County, Ventura County, and Western Riverside County. As a fourth‑generation family of engineers with 80+ years of engineering experience, #1 AC Guys brings rigorous craftsmanship and clear communication to every job.

Need commercial chiller repair in Fullerton? Contact #1 AC Guys for a thorough assessment and a repair plan that restores reliability, reduces energy use, and protects your operations.