Commercial Heat Pump Repair in Fullerton, CA

Why Fullerton Businesses Choose #1 AC Guys

#1 AC Guys is a fourth‑generation, family‑owned HVAC company with more than 80 years of engineering expertise. From offices and retail to restaurants, warehouses, and healthcare, we keep Fullerton facilities running with rapid, code‑compliant commercial heat pump repairs. Our mission is simple and unwavering: healthy air indoors for a healthier life. That means fixes that last, performance optimized, and air quality prioritized.

Our technicians are factory‑trained by leading manufacturers—Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea, Gree, and Haier—and experienced with most major brands on the market. We combine advanced diagnostics, OEM‑grade parts, and meticulous craftsmanship to minimize downtime and extend equipment life.

Commercial Heat Pump Systems We Repair

• Rooftop packaged heat pumps (light commercial to large RTUs)
• Split systems (heat pump condensers and air handlers)
• VRF/VRV systems (multi‑zone, heat recovery, low ambient)
• Ductless multi‑zone systems for tenant improvements and spot conditioning
• Water‑source and specialty commercial heat pumps

Common Issues We Fix—Fast

• No heat or inadequate heating due to reversing valve failure, compressor faults, low charge, or control board issues
• Icing and defrost problems caused by sensor errors, outdoor coil contamination, or failed defrost boards
• Short cycling and nuisance lockouts from ECM/PSC fan motor faults, TXV/EEV issues, or airflow restrictions
• High energy bills from improper refrigerant charge, dirty coils, or inaccurate thermostats/BMS settings
• Noise, vibration, and comfort swings from worn bearings, belts, or out‑of‑calibration controls

Our Repair Process

1) Precise diagnostics: We verify airflow, electrical, refrigerant circuit, and controls with pro‑grade instruments and manufacturer service data for your exact model.
2) Clear options: You’ll receive a written estimate with transparent pricing and side‑by‑side repair vs. replace guidance when relevant.
3) Quality repair: We install OEM or OEM‑equivalent parts, update firmware/settings as applicable, and correct root causes to prevent repeat failures.
4) Performance tune & verify: Post‑repair, we confirm capacity, defrost operation, superheat/subcooling, and safety controls—delivering a photo‑backed report for your records.

Healthy Air Is Our Mission

Commercial heat pump repair is only the start. We align each repair with indoor air quality best practices—proper filtration (right MERV rating), coil cleanliness, ventilation checks, and control strategies that meet California Title 24 guidance. If needed, we can recommend upgrades such as demand‑control ventilation, UV‑C for coils, or better filtration to reduce allergens and particulates—supporting occupant health and productivity.

Planned Maintenance for Uptime and Savings

Prevent emergencies with a maintenance plan tailored to how your Fullerton building operates. Typical visits include: coil cleaning, drain and pan service, electrical tightening, refrigerant charge verification, blower calibration, economizer testing, control optimization, and performance benchmarking. The result: fewer breakdowns, lower energy use, and longer equipment life.

Large and Complex Projects—Handled

From multi‑story office complexes to production spaces, we excel at challenging repairs and system re‑commissioning. Our commercial team understands sequences of operation for VRF/VRV and packaged systems, BMS integration, and the nuances of mixed‑use and multi‑tenant buildings. Need after‑hours service to avoid disrupting business? We can schedule around your operations and safety protocols.

Local to Fullerton. Ready When You Are.

We proudly serve Fullerton and nearby Orange County communities—Anaheim, Brea, Placentia, Buena Park, La Habra, and Yorba Linda—plus Los Angeles County, Ventura County, and Western Riverside County. As a licensed, bonded, and insured California contractor with EPA‑certified technicians, you can trust our team to deliver compliant, reliable commercial heat pump repair.

Brands and Training

Factory training with Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea, Gree, and Haier gives our team deep insight into manufacturer‑approved repair methods. We also service most major commercial brands common in Southern California. Whatever’s on your roof or mechanical room, we bring the right expertise to restore performance quickly.

Get a Fast, No‑Pressure Quote

Don’t let heat pump problems disrupt tenants, customers, or staff. Contact #1 AC Guys for same‑day diagnostics in Fullerton. You’ll get clear pricing, honest recommendations, and repairs aligned with your budget, timelines, and safety requirements. Book now to protect comfort, indoor air quality, and the bottom line.