Commercial Furnace Repair in Los Angeles

Trusted Commercial Furnace Repair Across Los Angeles

For four generations, our family of engineers has helped Southern California businesses stay warm with reliable, energy-efficient heating. #1 AC Guys blends deep engineering roots with modern diagnostics to solve problems others miss - from intermittent shutdowns and poor ventilation to uneven temperatures and recurring limit trips. We specialize in large, complex projects for offices, retail centers, warehouses, schools, healthcare clinics, and multifamily common areas.

When to Call for Commercial Furnace Repair

• Uneven heat, cold spots, or rising utility bills
• Short cycling, hard starts, or unusual noises and vibration
• Gas odors, ignition failures, or frequent lockouts
• Blower running but no warm air at the grilles
• Dusty air, poor ventilation, or CO detector alerts

We respond quickly, pinpoint the root cause, and restore safe, dependable heat with minimal disruption to your operations.

What We Service and Repair

• Commercial gas furnaces and rooftop packaged units (RTUs)
• Make-up air units and dedicated outdoor air systems (DOAS)
• Economizers, actuators, dampers, and ventilation controls
• Variable-refrigerant systems with supplemental heat and multi-zone heat pump solutions
• Ductless systems for offices, retail suites, and server rooms

From ignition systems, burners, and heat exchangers to blowers, motors, controls, sensors, and gas pressure issues, we fix it right the first time.

Our Proven Repair Process

1) Comprehensive diagnostic: combustion analysis, manifold gas pressure, static pressure and airflow readings, electrical testing, and safety checks.
2) Clear options: photos, findings, and code notes with firm pricing before work begins.
3) Precision repair: OEM-grade parts, clean workmanship, and verified safety operation.
4) Performance tune: balance airflow, calibrate controls, optimize staging and economizer settings.
5) Documentation: before/after readings for your records, facility audits, and compliance.

Healthy Air for a Healthy Life

Our mission is healthy indoor air. Every repair considers filtration, ventilation, and cleanliness. We can recommend right-sized filter upgrades (MERV-appropriate for your system), coil and blower cleaning, outside air strategies, and CO safety testing. The result is comfortable temperatures with cleaner, safer air for staff and customers.

Compliance, Safety, and Quality

We follow California Title 24, local building codes, and AQMD guidance, and adhere to OSHA best practices and lockout/tagout procedures. Permits are pulled when required, and we leave mechanical rooms neat, labeled, and photo-documented for your facility team.

Factory-Trained, Brand-Agnostic Expertise

Our engineers have trained with leading manufacturers including Fujitsu, Mitsubishi Electric, Midea, Gree, and Haier, and we service virtually all major commercial brands in the field such as Carrier, Trane, Lennox, York, Goodman, and more. Whether your equipment is new or legacy, we source the correct parts and restore dependable heat.

Prevent Breakdowns With Pro Maintenance

Seasonal maintenance plans protect your budget and comfort. We clean burners and heat exchangers, verify flame signal, test safeties, inspect belts and bearings, replace filters, confirm economizer performance, and benchmark equipment so small issues do not become costly outages. Ask about scheduling that aligns with your operating hours.

Energy and Budget Benefits

Right-sized repairs and tune-ups lower gas consumption, reduce blower runtime, and extend equipment life. We optimize setpoints, staging, ventilation rates, and controls so you spend less without sacrificing comfort. If your furnace is near end of life, we can advise on strategic retrofits that improve efficiency and reliability while meeting code.

Industries and Facilities We Serve

Offices, retail and restaurants, warehouses and light industrial, schools and houses of worship, healthcare clinics, and multifamily common areas. We excel at large and complex projects that demand careful planning, scheduling, and coordination.

Service Area

We proudly serve Los Angeles County and nearby Orange County, Ventura County, and Western Riverside County. From Downtown LA, the Westside, and Hollywood to the San Fernando Valley, San Gabriel Valley, South Bay, and surrounding cities, we arrive prepared to solve your heating challenge quickly and correctly.

Why #1 AC Guys

- Family-owned, 4th generation, 80+ years of engineering know-how
- Factory-trained technicians skilled in diagnostics and repairs
- Rapid response, clear communication, and documented results
- Upfront pricing with no surprises
- Mission-driven focus on healthier indoor air and lasting performance

Request Commercial Furnace Repair Today

Need Commercial Furnace Repair in Los Angeles? Contact #1 AC Guys to schedule service. Same-day options are often available, and after-hours appointments can be arranged to minimize downtime and keep your business on track.