Cornerstone Heating and Cooling color logo, light variation.
Cornerstone Heating and Cooling color logo, light variation.
Tempe, AZ
A Local HVAC Company You Can Rely On
Excellent (5.0)
Based on 144 reviews

Premier Tempe AC Repairs and HVAC Installations

When your air conditioner breaks down in the middle of a Tempe heat wave, fast and reliable help matters.

Cornerstone Heating and Cooling provides dependable Tempe AZ AC repair, air conditioning services, and full HVAC solutions for homes and small businesses throughout the area.

From urgent AC repair Tempe calls to long-term system upgrades, we deliver responsive customer service, clear pricing, and repairs you can trust. Our technicians service all major HVAC systems and work hard to restore comfort while protecting your air conditioning system and peace of mind.

Our owner, John Baca, working on a split unit air conditioner.

Our Promise to our Tempe HVAC Service Customers

As a local, family-run small business, we take pride in doing things the right way. Our team focuses on honest recommendations, high standards, and service that puts your comfort first—no pressure, no confusion.

You can expect:
Cornerstone Heating and Cooling company icon, black.
Prompt scheduling and clear communication
Cornerstone Heating and Cooling company icon, black.
Skilled, respectful HVAC technicians
Cornerstone Heating and Cooling company icon, black.
Professional results backed by a satisfaction guarantee

Many of our customers say they highly recommend us because we keep things simple and do what we say we’ll do.

John Baca working out of his van.

Full-Service AC Repair in Tempe, AZ

Performing an AC repair job in a Scottsdale residence.

AC Repair

If your AC unit isn’t cooling, blowing warm air, or making unusual noises, we provide fast and accurate air conditioning repair. We get your cooling system back up and running quickly and reliably.
AC Repairs: Learn More
Cornerstone Heating and Cooling installing an AC unit for a Scottsdale residence.

AC Installations

When repairs are no longer cost-effective, we offer professional AC installations to Tempe homes and businesses. We install properly sized, energy-efficient air conditioning systems and heat pumps that improve comfort, reduce strain on your AC system, and help control energy costs.
AC Installations: Learn More
Cornerstone Heating and Cooling providing a second opinion quote to a homeowner in the North Scottsdale area.

Second Opinions

Not sure whether to repair or replace your air conditioning system? We provide pressure-free second opinions so you can compare options, understand costs, and move forward with confidence.
Second Opinions: Learn More
John Baca, Cornerstone Heating and Cooling's owner, on a ladder working on an air conditioning vent.

HVAC Maintenance Plans

Regular maintenance helps prevent breakdowns, improves efficiency, and extends system life. Our maintenance plans include detailed inspections and tune-ups to keep your heating and cooling equipment operating at peak performance year-round.
HVAC Maintenance: Learn More

What Tempe Customers Are Saying About Cornerstone Heating and Cooling

"John and his team are responsive and reliable. Everything has been running smoothly and I will definitely continue to hire Cornerstone for all my heating and cooling needs."
Blair Cooper is a Tempe AC repair customer for Cornerstone Heating and Cooling.
Blair Cooper
"John showed up at the pre-appointed time. He performed a thorough inspection and I signed up for his maintenance program. I would recommend him without reservation."
Jim Kaye is an AC maintenance program customer for Cornerstone Heating and Cooling.
Jim Kaye
"John with Cornerstone Heating and Cooling was very helpful, knowledgeable and friendly! We had a leak issue with our Air Handler in the attic, and he came out with short notice and took care of it. Highly recommend!"
Ken Lannan needed a repair done to his residential HVAC system by Cornerstone Heating and Cooling.
Ken Lannan

Why Choose Cornerstone for HVAC Services in Tempe AZ

A blue house in hands icon.

Respect for Your Home or Business

We work carefully and cleanly, treating every property like it’s our own.
A blue on-time calendar icon.

Straightforward Pricing

No hidden fees or surprise charges—just clear estimates and dependable follow-through on every service call.
A blue house HVAC systems icon.

Clear, Practical Guidance

We explain what’s happening with your HVAC system, what your options are, and what makes the most sense for your situation.

Tempe HVAC Maintenance Program

Our maintenance program is designed to keep your system reliable and efficient through the hottest months. Each visit includes:

  • Seasonal cooling and heating tune-ups
  • Electrical and safety checks on major components
  • Airflow, temperature, and performance testing
  • Filter guidance to support system efficiency
  • System inspections to catch issues early

Routine maintenance helps lower repair costs, improve system reliability, and protect your investment for long-term peace of mind.

Our owner, John Baca, performing preventative maintenance on an HVAC unit.

Second Opinions Without the Pressure

Before committing to a major repair or replacement, let us review your options. We’ll explain proposed services, compare equipment, and help you decide whether repair or replacement is the smarter choice.

What you get:
  • Honest insight on your AC system’s condition
  • Transparent pricing and timelines
  • Confidence in your final decision
John Baca providing a quote and breakdown for a customer.

About Cornerstone

Family‑Owned

Cornerstone Heating and Cooling is a locally owned HVAC company led by John Baca. We’re committed to reliable service in Tempe, clear communication, and delivering comfort solutions that last.

Built on Service

From complex diagnostics to full AC installation, we combine technical expertise with friendly customer service—so you always know what to expect.

The owner of Cornerstone Heating and Cooling in front of his work van.

Frequently Asked Questions 

How fast can you handle AC repair in Tempe AZ?
Most service calls are scheduled within a day. If your air conditioner is completely down, we’ll do our best to prioritize your visit.
Should I repair or replace my AC unit?
If the issue is minor and the system is newer, repair is often the right choice. Older systems with frequent breakdowns may benefit from replacement.
Do you offer AC installation in Tempe?
Yes. We handle complete AC installations in Tempe, including system sizing, removal, and setup of new air conditioning systems or heat pumps.
What’s included in your maintenance plans?
Regular tune-ups, inspections, and performance checks designed to keep your system running efficiently.
Do you service heating systems as well?
Yes—we provide full heating and cooling services so your home stays comfortable year-round.
Do you work with small businesses?
Absolutely. We service both residential properties and small businesses throughout Tempe.
What about ductless mini splits?
We install, service, and repair ductless systems throughout Scottsdale—great for additions, offices, and zone control.
Nights or weekends—can you help?
If it can’t wait, call us. We’ll work to get your visit on the books quickly.

Ready to Cool? Schedule Your AC Repair in Tempe, AZ Today

Book Today