HVAC service in Ontario, CA.
Need HVAC help in Ontario, CA? For AC not cooling, warm air, furnace problems, new-system estimates, or maintenance, call during business hours or request service online. We serve Ontario homes and businesses with a clear diagnosis and written price before work begins.
Same-day appointments most days · Open Mon–Sun · 8:00 AM – 6:00 PM.
Same-day
Service in Ontario and across the Inland Empire — call early and we'll do everything we can to get a tech out today.
Book a specific service in Ontario
Your local HVAC team in Ontario.
At Alex Air & Heating Services LLC, we provide professional HVAC solutions with a commitment to quality workmanship, honest pricing, and reliable service.
From AC repair and heating to mini splits, thermostats and preventive maintenance, we keep homes and businesses across Ontario and the Inland Empire comfortable year-round.
Every HVAC service in Ontario, under one roof.
From a quick repair to a whole-home system replacement — one local team for AC, heating, air quality and maintenance.
AC Repair
Same-day AC repair, all major brands, upfront pricing.
See AC repairHeating Repair
Furnace and heat pump repair for every make and model.
See heating repairAC Installation
Right-sized, high-efficiency AC installation done right the first time.
See AC installFurnace Installation
High-efficiency furnace installation sized for your space.
See furnace installMaintenance Membership
$199/year per system: annual tune-up, 10% off repairs, no overtime fees.
See membershipHVAC in Ontario — FAQs
Yes — Ontario is right in our service area. We provide AC repair, heating, installation, maintenance and commercial HVAC throughout Ontario and the surrounding Inland Empire.
Yes, whenever our schedule allows. Call us during business hours and we'll do everything we can to get a technician out to Ontario the same day.
No hidden trip charges in Ontario. You'll always get an upfront, written price before any work begins.
Yes. We provide residential and light commercial HVAC service across Ontario and the Inland Empire.
Serving Ontario & nearby communities.
Ontario, CA — and the surrounding Inland Empire & LA County.
Do we cover your ZIP?
Not sure if you're in our area? Enter your ZIP above — we cover most of the Inland Empire & LA County.
- EPA-certified technicians
- Honest, upfront pricing — no hidden fees
- Same-day appointments often available
Prefer to talk? Call 626-777-4822
19 cities across 4 regions
Locally owned & operated
An independent local team serving the Inland Empire & LA County.
Same-day appointments
Call during business hours and we'll do everything we can to dispatch a tech the same day.
Fast response times
We answer fast and show up when we say we will.
We also serve the Inland Empire
HVAC repair, installation and maintenance in Ontario and these neighboring communities.
Need HVAC service in Ontario?
Same-day service, honest pricing, and EPA-certified technicians who get it right the first time.