Commercial Furnace Repair in Los Angeles

When your building’s furnace goes down, every minute matters. At #1 AC Guys, our commercial heating team responds fast with the engineering depth to solve complex problems—safely and to code. As a 4th‑generation family of engineers with 80+ years in engineering, we combine proven field know‑how with factory training from Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China) to deliver precise, durable repairs that protect productivity and indoor air quality.

What We Repair

• Gas and electric commercial furnaces (split and rooftop configurations)
• Packaged rooftop units with heating sections (RTUs)
• VRF/VRV systems with heating and heat recovery modules
• Make‑up air and dedicated outdoor air systems with heat
• Economizers, dampers, actuators, and controls
• Blowers, bearings, belts, motors, and VFDs
• Ignition systems, gas valves, flame sensors, and safeties
• Heat exchangers, flues, and venting (including CO safety checks)
• Thermostats, BMS integration, and communication faults

Symptoms We Fix

• No heat, intermittent heat, or short‑cycling
• Uneven temperatures, cold spots, or poor airflow
• Burner issues: delayed ignition, lockouts, or noisy operation
• Tripping limits, cracked heat exchangers, or CO alarms
• High utility bills, overheating equipment, or frequent resets
• Thermostat/BMS control conflicts and sensor failures

Our Repair Process

• Discovery and safety: verify power, gas, ventilation, and site safety; protect work areas
• Deep diagnostics: measure static pressure, combustion, temperatures, superheat/subcool when relevant, and electrical values
• Root‑cause analysis: pinpoint failure to avoid repeat breakdowns
• Clear options: present written repair choices with timelines and costs
• Quality repair: OEM‑grade parts when available and workmanship that meets code
• Validation: run tests, calibrate controls, and document results for your records
• Prevention: recommendations for maintenance and IAQ improvements

Safety, Codes, and Compliance

We prioritize safety, healthy air, and compliance on every job. Our team services equipment to meet California Title 24 energy requirements where applicable, adheres to local fire and mechanical codes, and follows best practices for combustion analysis, CO monitoring, and ventilation balancing. We pull permits when required and coordinate with property managers to minimize business disruption.

Why Businesses Choose #1 AC Guys

• 4th‑generation family of engineers with 80+ years in engineering
• Factory‑trained at Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China)
• Strength in large, complex commercial projects and multi‑site portfolios
• Precise diagnostics that reduce callbacks and unplanned downtime
• Transparent pricing, detailed reports, and photo documentation
• Same‑day service and 24/7 emergency response
• Licensed and insured in Southern California

Industries We Serve

• Offices and corporate campuses
• Retail, restaurants, and hospitality
• Warehouses, logistics, and light industrial
• Medical offices and clinics (non‑hospital)
• Schools, studios, places of worship, and multi‑tenant properties

Service Area

We serve Los Angeles County and nearby regions, including Orange County, Ventura County, and Western Riverside County. Common areas include Los Angeles, Santa Monica, West LA, Downtown, the San Fernando and San Gabriel Valleys, Pasadena, Glendale, Burbank, Long Beach, Torrance, the South Bay, Thousand Oaks, Oxnard, Anaheim, Irvine, Santa Ana, Riverside (western), and surrounding cities.

Maintenance and IAQ Upgrades

Prevent breakdowns and stabilize budgets with proactive maintenance tailored to commercial furnaces and rooftop systems. We offer scheduled filter changes, belt and bearing care, combustion tuning, coil and heat section cleaning, and control calibration. To support healthy indoor air, we evaluate ventilation strategies, filtration upgrades (e.g., appropriate MERV levels for your equipment), and control sequences that balance comfort, energy use, and code compliance.

Repair vs. Replace Guidance

We present data‑driven options so you can decide confidently: safety findings, age and condition of the furnace, cost of repeated failures, energy impact, and downtime risk. When replacement is the smart move, we design‑build to your goals—performance, IAQ, and lifecycle cost—then execute with minimal disruption.

Get Heat Back—Fast

Keep your doors open and your team warm. For expert commercial furnace repair in Los Angeles, contact #1 AC Guys for same‑day service or 24/7 emergency response. Call or message us to schedule diagnostics, request a quote, or set up a maintenance plan that prevents the next outage.
Healthy air. Reliable heat. Engineered solutions—by #1 AC Guys.