Air Conditioning


Dean's Shop is your #1 HVAC contractor in San Marcos, TX and the surrounding communities. We are the leading company for all of your air conditioning needs. If you need repairs, maintenance, or a brand new system installed, the technicians at Dean's Shop are the qualified and professional crew for the job.

We provide the highest quality service for your air conditioner. We also aim to educate and inform our customers. Informed decisions are good decisions. We want you to feel confident we are qualified to perform the service for which you are hiring us.

Air Conditioning Basics

The four main components to your air conditioner are:

Condenser: The condenser is the outside metal unit and where the gas from the compressor is condensed into a liquid. The gas entering the condenser is very hot. The temperature is then lowered, so the gas can convert back to a liquid.

Compressor: The compressor is inside the condenser. It circulates the pressurized refrigerant, to concentrate the heat, and changes the low pressure gas to high pressure.

Evaporator: The evaporator is the part of the system inside the home. In simple language, it absorbs the heat from your home.

Expansion Valve: The expansion valve controls the amount of refrigerant in your system.

All of these pieces are connected by a copper tube that handles refrigerant, creating a closed loop. Heat is collected in the evaporator, sent outside to the condenser. The heat is removed, and the cool air is recirculated back into your home.

AC Facts

An Air Conditioner Doesn’t Create Cool Air.
What happens in the AC process is actually the removal of heat from the air. Your AC uses a chemical called refrigerant to remove heat and transfer it outside. The warm air runs through the lines and coils in your unit and goes from liquid to gas and back again. During this process, the refrigerant removes the heat and transfers it elsewhere so that when the air comes out the other side, it is cool.

Your AC Will Remove Humidity.
Lower humidity helps the overall comfort level in your home by making you feel cooler, even if the temperature is the same.

Your Air Filter Needs To Be Checked And Replaced Every Three To Six Months.
(depending on the manufacturer’s recommendations)
A dirty air filter restricts your air flow, which reduces efficiency, costing you money, and over time can put stress on your unit and could cause a costly repair.

Maintenance, Maintenance, Maintenance.
Your air conditioner needs regular checkups to keep it running in tip-top shape. Having regular annual preventative maintenance will bring your system longer life and fewer breakdowns over all.

The Seasonal Energy Efficiency Ratio (SEER) measures air conditioning and heat pump cooling efficiency, which is calculated by the cooling output for a typical cooling season divided by the total electric energy input during the same time frame. A higher SEER rating means greater energy efficiency.

At Dean's Shop, we provide all the services you need to keep your AC running in top-notch shape. Call us at 512-353-4770 for repairs, maintenance, or new-system installation.

Need Air Conditioner Service?

Contact the experts at Dean's Shop.

Call us at 512-353-4770!

Air Conditioner Repair in Wimberley, TX 78676

“Professional job, waiting on repair options/costs.” – Robert S.

Air Conditioner Repair in San Marcos, TX 78648

“I’m in the service business and can tell you this service company knows what they are doing I respect them coming here to clean up what the kids from other AC repair shops have charged me to do wrong 6 star’s for deans”

– Matt W.

Air Conditioner Installation in San Marcos, TX 78666

“Casey from Dean’s Shop came by today to finish HVAC installation. Like always, he displayed a professional demeanor and assured everything was working properly. I am very thankful to Casey, Walter, Danetta, and Lindsey for their professionalism, and hard work, as they perform the important services provided by Dean’s Shop.”

– Charles G.

Air Conditioner Installation in San Marcos, TX 78666

“Casey from Dean’s Shop came this morning to install a compressor. As always, he was very polite and professional. He completed his task and briefed me on the installation. He carries himself in a very respectful and competent manner. I have complete confidence and trust in Casey, and all employees of Dean’s Shop, as they perform their important tasks.”

– Charles G.

Air Conditioner Repair in Kyle, TX 78740

“Casey was great! He was knowledgeable, and explained the issue clear and concise. He was fast and efficient. Very polite and considerate of the home and the area”

– Teena B.

Air Conditioner Repair in Buda, TX 78610

“After having a terrible experience with another contractor, we chose Dean’s Shop to come out this time and we are so glad we did! Casey was thorough, kind and very helpful. Will be using them in the future for sure!!”

– Sarah A.

Air Conditioner Repair in Buda, TX 78610

“We very much appreciate the fast response for our unit not cooling! Our upstairs unit was not functioning and my husband's office and daughter's bedroom both were pretty miserable! Walter M was thorough, professional and informative and we appreciate his taking the time to explain everything. Would highly recommend Dean's Shop and especially Walter M for your AC needs!”

– Lori J.

Air Conditioner Maintenance in San Marcos, TX 78666


– Kathryn K.

Air Conditioner Repair in San Marcos, TX 78666

“Best company I have ever dealt with”

– brenda K.

Air Conditioner Repair in San Marcos, TX 78666


– Jon A.

Dean's Shop proudly provides HVAC service to Buda, Kyle, Martindale, New Braunfels, San Marcos, Seguin, Wimberley and the surrounding Texas communities. Visit our service area page for more coverage details, call us at 512-353-4770, or request service online today.