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Air Conditioning

Walker Air Conditioning & Heating is your #1 HVAC contractor in Mesquite, 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 Walker Air Conditioning & Heating 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 Walker Air Conditioning & Heating, we provide all the services you need to keep your AC running in top-notch shape. Call us for repairs, maintenance, or new-system installation.

Need Air Conditioner Service?

Contact the air conditioning experts!

Air Conditioner Repair in Carrollton, TX 75006

“happy now”

– Clyde S.

Air Conditioner Maintenance in Rockwall, TX 75087

“Technician is very knowledgeable about all phases of heating and air conditioning systems. Extremely helpful in evaluating modifications required to make our AC system more efficient.”


Air Conditioner Maintenance in Mesquite, TX 75149

“On time, respectful, and very good service.”


Air Conditioner Maintenance in Farmers Branch, TX 75234

“Great job. Courteous and professional.”

– Alllen J.

Air Conditioner Maintenance in Dallas, TX 75229

“We have used Walker to replace units over 6 years ago when we moved and continued to use them ever since with the annual service agreement. They are honest, trustworthy and always on time within the timeframe window. We do not call anyone else for hearing or air.”

– James F.

Air Conditioner Repair in Garland, TX 75040

“Thanks to Mark for his prompt response and he got my AC working again.”


Air Conditioner Repair in Dallas, TX 75253

“great job!! thank you so much!!
i can feel the cool air now.”

– Lisa M.

Air Conditioner Repair in Allen, TX 75002

“Arrived when expected; courteous, friendly and knowledgeable. Proactive by recording equipment information in case additional service is required.”

– Michael S.

Air Conditioner Repair in Mesquite, TX 75150

“Very good, friendly, and did a good job.”


Air Conditioner Repair in Dallas, TX 75217

“Wonderful as usual, Walker ac is #1”

– leonard h.

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