Residential Emergency Heating Service in Ontario, CA

When your home loses heat, comfort and safety come first. #1 AC Guys delivers residential emergency heating service in Ontario, CA with the precision of a dedicated engineering team. We combine rapid response with deep technical expertise so your system is restored correctly the first time.

What we service during emergencies

• Gas and electric furnaces (ignition, flame sensor, inducer, control board, blower, safety switches)
• Heat pumps (reversing valve, defrost, compressor, refrigerant circuit, sensors)
• Ductless mini‑splits (Fujitsu, Mitsubishi Electric, Midea, Gree, Haier: communications, boards, fans, coils)
• Thermostats and controls (smart and conventional)
• Electrical and airflow faults (breakers, relays, wiring, ducts, filters)

Our engineers complete factory training with Fujitsu (Japan), Mitsubishi Electric (Thailand), Midea (China), Gree (China), and Haier (China). That means we apply manufacturer-level diagnostics and repair standards to resolve complex failures under pressure.

Why Ontario homeowners choose #1 AC Guys

• Fourth‑generation family of engineers with 80+ years of engineering experience
• Residential emergency specialists for difficult, large, and complex projects
• Healthy‑air mission: solutions that improve comfort, safety, and indoor air quality
• Stocked vehicles for faster first‑visit fixes
• Clear, upfront pricing—no surprises
• Permits and code‑compliant work for lasting performance

We’re a Los Angeles–based, family‑owned company serving Ontario and nearby communities across Los Angeles County, Orange County, Ventura County, and Western Riverside County.

Our emergency process

1. Rapid dispatch
We prioritize Ontario calls and route the nearest qualified engineer with the right parts and tools.

2. Safety check
We secure gas, electrical, and combustion systems, then assess carbon monoxide risk and ventilation.

3. Root‑cause diagnostics
Using engineering‑grade methods, we isolate the failure—not just the symptom—to prevent repeat breakdowns.

4. Clear options
You’ll receive transparent repair choices and pricing before work begins.

5. Precise repair
We follow manufacturer procedures for reliable, code‑compliant results.

6. Verification & guidance
Post‑repair testing confirms performance. We share preventive tips to protect your system and air quality.

Common residential heating emergencies we solve

• No heat or intermittent heat, short cycling, or frequent resets
• Ignition failures, burner issues, or abnormal combustion
• Heat pump not heating, stuck in cool mode, or frosting over
• Blower not running, weak airflow, or hot/cold spots
• Electrical trips, control board faults, or sensor errors
• Strange odors or sounds indicating safety concerns

If your furnace or heat pump is older, we provide repair‑versus‑replacement guidance to protect your budget and comfort. When replacement is the smarter path, we engineer right‑sized, high‑efficiency solutions that elevate comfort and air quality.

Transparent pricing, real value

Before any work, you’ll receive straightforward pricing. Our goal is long‑term reliability—not quick fixes—so you get true value from every service.

Comfort and healthier air at home

Our mission is healthy air at home for a healthier life. Alongside emergency heat restoration, we can address filtration, ventilation, and humidity to support cleaner, safer indoor air—especially important during cold‑weather closures.

Proudly serving Ontario and Southern California

We’re headquartered in Los Angeles and respond quickly to Ontario, CA and nearby communities across Los Angeles County, Orange County, Ventura County, and Western Riverside County. Whether you’re near Ontario Ranch, historic downtown, or the airport area, we’re ready to help.

Be prepared: quick homeowner checklist

• Check thermostat settings and replace batteries
• Ensure the furnace switch/breaker is on
• Replace a clogged filter to improve airflow
• For heat pumps, clear debris from the outdoor unit
• If you smell gas, shut off the supply and call for help immediately

These steps may restore operation temporarily—but if heat is still out, we’ll take it from here.

Call #1 AC Guys for residential emergency heating in Ontario, CA

When your family needs heat restored now, trust the fourth‑generation engineers at #1 AC Guys. We bring 80+ years of engineering excellence and factory training from Fujitsu, Mitsubishi Electric, Midea, Gree, and Haier to every emergency call. Fast response, precise repairs, and a commitment to healthy air—engineered for your home.