Cornerstone Air

05/17/2026

The dye don’t lie!

One of method of finding those pesky refrigerant leaks is utilizing a dye injection. Once the leak is located, we can develop a course of action with the customer.

10/20/2025

Another happy customer taken care of in Wylie. We not only specialize in residential HVAC, but commercial HVAC as well. From maintenance to full system replacement we have you covered!

08/09/2025

Thank you Cornerstone Air for being a Collinsville Pirate 𝐆𝐨𝐥𝐝 𝐒𝐩𝐨𝐧𝐬𝐨𝐫 for the 2025-2026 school year! 🏴‍☠️

07/19/2025

Found the problem and provided solution SAME DAY!

06/21/2025

Out with the old and in with the new. Whatever the problem, let us help you!!!!!!

05/26/2025

🇺🇸Memorial Day savings🇺🇸

From now until May 31st we’re offering $1000 off any new HVAC system install. Don’t miss out, hot summer days are approaching fast!

05/14/2025

First scorcher of the year!
Let Cornerstone Air keep you cool.

Give us a call 214-919-4981!

05/03/2025

We work hard for our customers, even when it means installing a new system on Saturdays.
Call/text us anytime for repairs, estimates, or to sign up for our maintenance program at 214-919-4981

04/18/2025

You know it’s time to replace if your furnace has nameplate made of metal instead of a sticker!!!!!

Cornerstone Air proudly serves McKinney and the surrounding areas. Cornerstone Air services residential and commercial equipment. We provide the highest quality service, maintenance, and instillation. With 20 years of combined experience from our owners.