Air Conditioning Service | Car and Light Truck Auto Repair Shop


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1665 Scherer Pkwy. St Charles, MO 63303




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Air Conditioning Maintenance, Service & Repair


car air conditioning hot air


Air Conditioning Maintenance
Don’t lose your cool over an air conditioning system that’s not working properly!
Bring in your car, truck or SUV for air conditioning inspection, diagnosis and service.

Did you know that your air conditioning belt drives many other components in your vehicle?
This means that a broken belt can have a much worse impact than simply an uncomfortable trip. The expert mechanics will take care of everything- whether it’s simply a recharge of refrigerant or maybe installing a new compressor- you’ll have peace of mind knowing that your vehicle will keep you cool and safe.



Automotive Air Conditioning System Service Diagnosis & Repair for Cars & Light Trucks


car air conditioning service



The Federal Environmental Protection Agency regulates the type of refrigerant you can use in your air conditioner. Your St. Charles, MO. service technicians are current on EPA rules for properly removing and disposing of used refrigerant, protecting the environment while keeping you cool. At Sparks Tire & Auto in St. Charles Missouri we install quality NAPA replacement parts. Give us a call at 636-946-5900 and let us help keep you safely and economically on the road... (Read more)

Signs that your vehicle may have a malfunctioning air conditioning system include:
 car air conditioning service not blowing cold air Your air conditioner blows only hot air from the vents
 car air conditioning service not blowing cold air The air conditioner blows cold only sporadically
 car air conditioning service not blowing cold air There are noises when you run your air conditioner


Every Air Conditioning Service begins with our state-of-the-art air conditioning system diagnostic test. This diagnosis includes:
 car air conditioning service not blowing cold air Inspection of the air conditioning compressor drive belt for cracks or damage
 car air conditioning service not blowing cold air Inspection of all air conditioning-related components for leaks or damage
 car air conditioning service not blowing cold air A check for proper operation of the air conditioning compressor and other components prior to service
 car air conditioning service not blowing cold air Testing lines, hoses, seals and other system components for leaks

car air conditioning system serviceDepending on the results of the diagnosis, the system is then serviced only as required to ensure proper operation, which might include:
 car air conditioning service not blowing cold air Evacuating refrigerant from the system
 car air conditioning service not blowing cold air Recharging the system using the appropriate refrigerant to the exact system capacity according to the vehicle manufacturer’s specifications
 car air conditioning service not blowing cold air Performing any necessary service on compressor, evaporator, condenser and electrical controls
 car air conditioning service not blowing cold air Rechecking the system to ensure proper operation.

While your vehicle is at the center, an Sparks Tire & Auto certified mechanic will also perform a Multi-Point Inspection to safeguard that all of the major systems in your car, truck or SUV are in good working order.



Watch as we discuss service and repair issues around your A/C system.

Air Conditioning System - NAPA Service Assistant



Air Conditioning Service/Repair

air conditioning serviceToday’s vehicle a/c systems can lose 5% of their refrigerant per year causing the system to become inefficient. Another thing to remember is the a/c system is used all year long, every time the defroster is used the a/c system is activated to assist in removing the moisture from inside the vehicle which can defog windows much faster than non a/c equipped vehicles. It is recommended that modern a/c systems be tested annually to assure peak performance. Schedule an appointment with one of our factory trained professionals and let us make sure you’re a/c system is running efficiently. We have the latest equipment available to diagnose the computerized components, as well as to service all the different systems including the newer systems on hybrid and electric vehicles. Below is a brief explanation of the major components that make these a/c systems work so well:



The compressor is a belt-driven device that compresses refrigerant gas and transfers it into the condenser. The compressor is the core of your vehicle's air conditioning system.



The condenser's primary function is to cool the refrigerator. The condenser dissipates heat released by compressed gases and condenses them into high pressure liquids.


Receiver (Drier):

The receiver is a metal container that serves as a storage receptacle for the refrigerant; also known as a drier because it absorbs moisture from the refrigerant and filters out harmful debris and acids. You should change your drier every 3-4 years to ensure quality filtration and prevent any chemical damage.


Orifice Tube/Expansion Valve:

The orifice tube (also known as the expansion valve) is a controlling mechanism that regulates refrigerant flow throughout the system. It also converts high pressure liquid refrigerant (from the condenser) into low pressure liquid, so that it can enter the evaporator.



The evaporator removes heat from the inside of your vehicle. The evaporator allows the refrigerant to absorb heat, causing it to boil and change into a vapor. When this occurs, the vapor leaves the evaporator through the compressor, cooling your car and reducing humidity. The evaporator houses the most refrigerant in the heat transfer process and harmful acids can corrode it. This corrosion typically damages the evaporator beyond repair.



NAPA AutoCare Archived Articles

Category - Air Conditioning


Air Conditioning Service in St. Charles
Hey St. Charles! Let's talk about one of our Missouri summertime must-haves: your car A/C. It's real easy for St. Charles drivers to take their car's air conditioner for granted... (Read more)


Automotive Tips from Sparks Tire & Auto: Air Conditioning – Common Problem
Your auto air conditioning system cools and conditions the air in your passenger compartment when you are driving around St. Charles. It also removes moisture from the air to keep your windows from fogging up... (Read more)

Automotive Tips from Sparks Tire & Auto: Making Your A/C System Last Longer
St. Charles drivers know that if their air conditioning system isn’t making cool air like it used to, there is a problem. It may be as simple as adding more of the right kind of refrigerant... (Read more)


Automotive Tips from Sparks Tire & Auto: Air Conditioning Inspection
Most auto manufacturers recommend an interval for an air conditioning system inspection. The inspection uncovers leaks, worn hoses and assesses the condition of the other components... (Read more)

Cool Breeze: Air Conditioning Service at Sparks Tire & Auto in St. Charles
Most Missouri auto owners know that their vehicles need regular preventive maintenance like changing the oil and filters, rotating the tires and refilling the washer fluid. But did you know that your air conditioning system needs routine maintenance... (Read more)


Air Conditioning Maintenance at Sparks Tire & Auto in St. Charles
Warm weather or cold, St. Charles drivers still need to think about their vehicle's air conditioning. Most St. Charles people don't service their air conditioning until after it fails. At Sparks Tire & Auto, we can advise you on your vehicle manufacturers preventive maintenance schedules for air conditioning service, just as we do for transmission service, oil changes and so on.... (Read more)

A Cold Day in St. Charles – Air Conditioning Service at Sparks Tire & Auto
Most St. Charles drivers worry about a breakdown or a tire blowout on a busy Missouri highway, but don't worry too much about failure of their air conditioning system. A breakdown on the side of the road can be a miserable and dangerous affair during St. Charles rush hour, but so can a long ride in a hot vehicle... (Read more)



Air Conditioning Service

The air conditioning unit in your vehicle operates similarly to a refrigerator. Your vehicle’s air conditioning unit is designed to move heat from the inside of your car to outside of it.

Your vehicle’s air conditioning unit has six major components:

 • The refrigerant carries heat. In modern cars, refrigerant is a substance called R-134a. Older cars’ refrigerant is called r-12 freon, which is more expensive and difficult to find than R-134a.

 • The compressor circulates and compresses refrigerant within the vehicle’s cooling system.

 • Your vehicle’s condenser changes the refrigerant from gas to liquid and expels heat from the car.

 • The expansion valve (sometimes called the orifice tube) is a nozzle that simultaneously drops the pressure of the refrigerant liquid, meter its flow and atomize it.

 • Your vehicle’s evaporator transfers heat to the refrigerant from the air blown across it, cooling your car.

 • The receiver or dryer filters your vehicle’s refrigerant and oil, removing moisture and other contaminants from them.

When you start your vehicle’s air conditioning system, the compressor works by putting the refrigerant under pressure, sending it to the condensing coils, which are generally in front of your vehicle’s radiator. The condenser expels hot air to outside the car, cooling the air within the vehicle. When this happens, the refrigerant is cooled, and it changes from a gas to a liquid, which then passes through the expansion valve and to the evaporator.

Once the evaporator receives the liquid-state refrigerant, it loses pressure and cools the remaining liquid. The vehicle’s blower moves air across the evaporator and into the vehicle’s interior. If you keep your air conditioning unit turned on, the refrigerant goes through this cycle continuously.

If any of these components is damaged, it can turn your cool car into a furnace during the summer months. Your vehicle’s air conditioning issue could be as simple as topping off refrigerant to replacing a valve. When your air conditioning unit is not working as it should, bring your vehicle to Sparks Tire & Auto, conveniently located in St. Charles, Missouri. One of our trained air conditioning specialists will inspect your car’s air conditioner, all lines, the evaporator and the compressor for leaks and wear.



Cool Breeze: Air Conditioning Service In St. Louis

Most Missouri car owners know that their vehicles need regular preventive maintenance like changing the oil and filters, rotating the tires and refilling the washer fluid. But did you know that your air conditioning system needs routine maintenance as well? Taking care of your air conditioning system can extend its life and prevent costly repair bills.

Why is it critical for St. Louis motorists to get routine maintenance on their air conditioning system? First, the refrigerant contains an added lubricant. As the refrigerant circulates through the air conditioning system, its parts are lubricated. This constant lubrication keeps the parts functioning well. But over time, this lubricant is used up, and without it, the parts will eventually seize up and fail.

St. Louis and more specifically, St. Charles folks should understand, however, that the air conditioner will continue to pump out cool air even without the lubricant, so you won’t know the system is sick until it actually dies. So good car care includes regularly checking the refrigerant and lubricant in your sedan air conditioning system and replacing it if needed.

The second reason your air conditioning system needs preventive maintenance is that air and water can get into the system. Air, water and the contaminants they contain will reduce the efficiency of the air conditioning system and can cause corrosion of the system’s parts. Keeping the air conditioning system clean is an important practice and will extend its life and keep you from losing your cool on hot St. Louis days.

How often should you get a routine car air conditioner inspection? It varies from vehicle to vehicle. Check your owner’s manual for the auto manufacturer’s recommendation.

Here’s a good piece of auto advice for Missouri motorists that will extend the life of their air conditioning systems: You should run your air conditioner in the winter every once in a while. This circulates the refrigerant, which lubricates the seals. That way, they won’t dry out during cold St. Louis weather.

Your air conditioning system doesn’t just cool the air in your sedan; it dries it out as well. So if you have trouble with a foggy windshield, flip on your air conditioning on the defrost setting. You may be surprised at how quickly it takes care of the problem. Of course, some vehicles can’t run the air conditioner and defroster at the same time; you should check your owner’s manual or with the car maker if you are uncertain whether this feature works in your car or not.

So, after learning about preventive maintenance for your A/C, you might now be wondering if your air conditioner is in trouble. Two early warning signs of a failing air conditioner are (1) the air just isn’t getting as cold as it used to and (2) there’s a strange noise when the air conditioner turns on. If you notice either of these symptoms in your car or light truck, you should bring it to Sparks Tire & Auto in St. Charles as soon as possible.

Just some good auto advice to keep you cool in St. Louis and keep you on the road!



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Having trouble with your car or light trucks air conditioning system?   Contact us for advice.







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1665 Scherer Pkwy, St Charles, MO 63303

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