Looking for a reliable HVAC company in Ontario, CA? Whether you're dealing with an AC that won't cool, a furnace that won't light, uneven rooms, or you're ready to upgrade to a heat pump, choosing the right technician makes all the difference. We've researched and compiled the top 9 HVAC companies serving Ontario to help you find the best fit.
From diagnostic skill to response times, customer reviews, and service range, here are the 9 best HVAC companies in Ontario, CA.
Ontario HVAC ★ Editor's Pick
Ontario HVAC is Ontario's premier heating and air conditioning provider, delivering professional residential and commercial repairs and installations backed by experienced technicians and over a decade of hands-on HVAC work. As a locally owned and operated company, they understand the climate patterns and housing stock that shape how Ontario comfort systems perform and fail.
What sets Ontario HVAC apart is their repair-first approach, transparent pricing, and commitment to complete customer satisfaction. Every technician is background-checked, professionally trained across air conditioners, furnaces, heat pumps, and ductless systems, and arrives in a truck stocked with the most common replacement parts. They offer upfront pricing with no hidden fees and fast same-day or next-day appointments.
Why Ontario HVAC Is Our #1 Pick:
- Fast Response & Same-Day Service, Available 6 days a week with same-day or next-day appointments across the Ontario area
- Experienced Technicians, Every technician brings years of hands-on field experience across cooling, heating, heat pump, and ductless systems
- Upfront, Transparent Pricing, Clear diagnosis and written quotes before any work begins, no surprise charges
- Full-Service Comfort, Repairs, replacements, heat pump conversions, duct cleaning, maintenance, and commercial systems, all in one company
- Repair-First Honesty, If a small part fixes it, that's the recommendation; replacements are proposed only when the math truly favors them
- Maintenance Plans, Annual flush-and-inspect visits that clear sediment, check the anode rod, and extend system life
Reliance Home Services
Reliance Home Services offers a comprehensive range of HVAC services, including expert AC repair, heating repair, and new system installations. They are known for their prompt service and customer-focused approach, striving to ensure comfort and satisfaction for their clients.
Notable Strength: Strong reputation for reliable and timely service.
Years in Business: 20+
Accurate Electric, Plumbing, Heating & Air
This company provides a full suite of home services, with a strong focus on heating and air conditioning. They specialize in diagnosing and repairing complex HVAC issues, alongside offering efficient new system installations for residential and commercial properties.
Notable Strength: Expertise in complex HVAC diagnostics and repairs.
Years in Business: 25+
Sanborn's Air Conditioning & Heating
Sanborn's has been serving the Inland Empire for decades, providing trusted AC repair, furnace repair, and complete HVAC system installations. They are recognized for their commitment to quality workmanship and long-term customer relationships.
Notable Strength: Long-standing community trust and commitment to quality.
Years in Business: 70+
AAVCO Plumbing, Heating & Air Conditioning
AAVCO offers comprehensive HVAC solutions, including emergency AC and heating repairs, as well as professional system installations. They are praised for their knowledgeable technicians and transparent pricing, ensuring a positive customer experience.
Notable Strength: Transparent pricing and knowledgeable technicians.
Years in Business: 30+
All Pro Plumbing, Heating, Air & Electrical
All Pro is a full-service home comfort provider, offering expert AC repair, heating system maintenance, and new HVAC installations. They are known for their responsiveness and ability to handle a wide range of heating and cooling needs efficiently.
Notable Strength: Broad range of home comfort services and quick response times.
Years in Business: 25+
Conejo Valley Heating and Air Conditioning
While their name suggests a different area, Conejo Valley Heating and Air Conditioning serves a broad region including parts of the Inland Empire, providing reliable AC and heating repairs, as well as new HVAC installations. They are recognized for their attention to detail and customer satisfaction.
Notable Strength: Attention to detail in installations and repairs.
Years in Business: 40+
Ace Home Services
Ace Home Services offers comprehensive HVAC services, including emergency AC and heating repairs, as well as new system installations. They are known for their professional approach and dedication to solving customer comfort issues effectively.
Notable Strength: Professional and dedicated customer service.
Years in Business: 15+
Comfort Time Heating & Air Conditioning
Comfort Time specializes in all aspects of residential HVAC, offering expert AC repair, furnace repair, and full system replacements. They are highly regarded for their honest assessments and efficient service, aiming for optimal home comfort.
Notable Strength: Honest assessments and efficient service.
Years in Business: 20+
How We Chose the Best HVAC Companies in Ontario
Our ranking considered several key factors:
- Local Experience & Reputation: An established local track record, years of hands-on HVAC work, and strong word-of-mouth across the community.
- Customer Reviews: Online reviews across Google, Yelp, and the BBB for consistent quality and satisfaction.
- Response Time: Priority for companies offering fast scheduling, especially for no-hot-water calls and leaking tanks.
- Pricing Transparency: Companies providing clear diagnostics and written estimates ranked higher.
- Range of Services: Full-service companies that handle repairs, system replacements, heat pump conversions, ductless installs, and commercial work scored best.
- Diagnostic Quality: Preference for companies that identify the actual failed component, element, thermostat, gas valve, anode, rather than defaulting to full replacement.
- Local Presence: Companies with deep roots in the Ontario community.
Need HVAC Help in Ontario Right Now?
Call Ontario's top-rated heating and air team for fast, professional service.
Call Ontario HVAC: (909) 310-0762