family enjoying cool home AC fixed
Collin County’s home comfort specialists


  • Affordable AC and heating repair service.
  • Whole home HVAC system installation & replacement.
  • Seasonal checkups
  • Family owned and operated.
AC fixed in home and house is cold again

Collin County’s Trusted Heating and Air Conditioning Company


  • Quality HVAC repair by Code 3 Air Conditioning and Heat’s experienced and friendly technicians.

  • A/C services designed to meet your budget and schedule.

  • If you’re looking for a reliable heating and air service near me, then you’re in the right place.

  • We are a supplier of home air conditioning systems.

  • Whole home heating systems repair and installation by our licensed techs

A/C Repair

AC heating repair

Using our years of experience and state-of-the-art technology, we'll get your cooling or heating systems up and running as quick as possible. If it's in the middle of a hot Texas summer or a cold winter's day, we're there for you.

HVAC Systems

new HVAC system installation

The average lifespan of an HVAC system is about ten years. When (not if) it fails beyond repair, we'll provide very competitive prices and quick turnaround times to get your home or office back to a comfortable temperature.

Seasonal Checkups

HVAC checkup

When you keep your system well maintained, it performs better, costs less to run and extends the lifespan of the components. Don't come home to a hot house in July!

Your trusted air conditioning and heating company serving Collin County, Texas.

Code 3 Air Conditioning and Heat employs the latest diagnostic technology to quickly fix your heating or cooling issue. Coupled with decades of experience, this local family owned and operated business has been trusted by your neighbors and other local business owners to keep their homes and offices running at comfortable temperatures.

We understand how uncomfortable it can be in our hot Texas summers, so our crew is trained and experienced to get things cooled off as quickly as possible. We offer a range of equipment to suit your monetary requirements as well as offering financing when you need extra help.

When you call us and experience our first class customer service and results, you’ll discover why your neighbors have trusted their homes to Code 3 Air Conditioning and Heat.

AC condensers outside home in Allen
AC condensers outside home in Allen

Here’s what your neighbors have been saying about us

top rated AC repair company


Do you have one of these heating or cooling problems?


Our HVAC services cover:


  • Maintenance service calls for heating or air conditioning.
  • Units are not sufficiently cooling the home or office.
  • The A/C is not coming on at all.
  • The outside unit is making odd noises.
  • Heating does not appear to be working in the winter.
  • Electric bill is really high and the units seem to run constantly.
  • Installation of smart thermostats to help reduce costs.
  • We have an old system and needs to be replaced with a more efficient system.
  • Expansion of home or office space requires a system upgrade.
  • Conversion of a garage into a living area requires new ductwork.
  • Holes or tears in the ducts in the attic need repairing.

Contact Us


Service Hours

Monday8:00AM – 6:00PM
Tuesday8:00AM – 6:00PM
Wednesday8:00AM – 6:00PM
Thursday8:00AM – 6:00PM
Friday8:00AM – 6:00PM
Even though we don’t normally take calls after hours, it doesn’t mean that we’re not hard at work completing a job. During the summer, we can usually replace an entire HVAC system in one day, even if it means staying into the evening hours to get the job done.

Why Code 3 Air Conditioning and Heat is Allen’s Favorite HVAC Company


Our Installation Staff

Do you want a company that stands behind their reputation and guarantees their work? Some companies employ day laborers, so there is no continuity between the staff and the quality of jobs. At Code 3 Air Conditioning and Heat, we have a dedicated installation staff that have been trained and supervised according to our high standards,


Affordable AC Systems

We don’t skimp on the quality of our job, but that doesn’t mean it’s going to be expensive. At Code 3 Air Conditioning and Heat, we keep our overhead to a minimum and negotiate good deals on the equipment. This means that we can pass the savings on to you. We often beat our competitors’ prices.


While price may be a major factor, so is cost. As the DFW local motivational speaker Zig Ziglar would often explain, “There is a difference in cost and price. Price is what you initially pay for something and cost is the long term investment into that item”.


Is it worth it to save a little bit on price up front by going with a cheaper system installed by cheap labor and risk it breaking down in the heat of the summer with an expired warranty? We think not, and we’re sure you would agree with us.


Are we the cheapest HVAC company in Collin County? No. And we don’t want to be known for the lowest price. We want to be known for installing a system that will meet your needs and serve your family for many summers and winters to come. Hopefully the only time you will see us is when you call us for a seasonal system checkup.

HVAC Brands that we Service

We service most major brands and install the latest technology efficient units on the market. We do offer several options when it comes to brand choices, depending on your needs and wallet. We also offer financing options if needed.


Several brands of air conditioner and heating units exist, most of them are manufactured by a handful of well known companies and not necessarily a wide range of companies. In our experience, the most popular brands are:


  • Carrier
  • Goodman
  • Lennox
  • Maytag
  • Rheem
  • Trane
  • Westinghouse
  • York
AC system brand names
Contact Code 3 Air Conditioning and Heat today and schedule your A/C repair or new HVAC system installation by calling us at (214) 734-7775