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    DO THE COMPLETE A/C REPAIR JOB

    Make sure your A/C system is ready to keep you cool all season long. While identifying a leaking or non-working system is simple, what needs to be done to fix the problem may not be as easy to determine. When you work on an air conditioning system, it's important to do the complete job to prevent future A/C troubles. This guide will help you understand the components that get replaced when repairing a failed air conditioning system, as well as help to explain how all the individual components in the system work together to deliver cold air to you and your passengers.

    There are three types of air conditioning systems: orifice tube, expansion valve or a combination of the two which is found in rear air conditioning systems.


    ORIFICE TUBE SYSTEM

    This system uses an orifice tube to meter the flow of Freon (refrigerant) to the evaporator core. The orifice tube has a brass sleeve with a fixed orifice and a screen to filter out any contamination.

    An orifice tube system uses an accumulator to absorb any moisture in the refrigerant before it passes through the orifice tube.

    EXPANSION VALVE SYSTEM

    This system uses an expansion valve to meter the flow of refrigerant to the evaporator core. The expansion valve uses a temperature sensor at the evaporator core to determine the amount of refrigerant that it will allow to pass through its variable orifice.

    An expansion valve system uses a receiver drier to absorb any moisture in the refrigerant before it passes through the expansion valve.

    HOW TO DO THE COMPLETE A/C JOB?

    It is important to complete all the steps when repairing your air conditioning system. AutoZone has partnered with ASE-Certified Master Technician Bruce Bonebrake to bring you this 60-minute video of step-by-step instructions for doing the job right the first time. Eliminate the guesswork and get hands-on instruction from a pro. Learn More.

    WHY SHOULD I DO THE COMPLETE A/C JOB?

    When an A/C compressor fails in an A/C system, it is likely that more than one component will be affected as everything inside the system is connected. Simply changing the compressor may not solve your A/C problem.

    When you buy and install the components that make up the complete job your warranty period increases (going from a 90-day warranty to a 2-year warranty with new compressor and from 90 days to 1 year with a remanufactured compressor).

    View content for UNDERSTANDING YOUR A/C SYSTEM.

    HOW TO AUTO AIR CONDITIONING REPAIR DVD

    Let Bruce Bonebrake guide you through the steps to repair your air conditioner and get it back to working like new. BUY IT NOW

    A/C SYSTEM COMPONENTS

    THE COMPLETE JOB COMPONENTS

    The components listed in this section are what you need for THE COMPLETE JOB for performing a major repair. Replacing these parts together is important to ensure long life of your air conditioning by keeping your system free of contamination and moisture.

    A/C COMPRESSOR

    This is the refrigerant "pump" - the A/C compressor circulates refrigerant through the system.

    Common Problem - A compressor can fail over time due to parts wearing down inside the compresor itself. When these parts wear down, they can introduce debris and particles into the system which can cause the compressor to leak at the seals which can cause the failure of the item.

    What to look for - A compressor that makes rattling noise or has visible signs of leak.

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    ACCUMULATOR/RECEIVER DRIER

    This system component uses a desiccant bag to collect moisture and prevent damage to your system by keeping the moisture away from the compressor.

    Common Problem - Torn seals or other leaks. When the system has a leak, air enters as the refrigerant escapes which results in more moisture than the desiccant can absorb. Once the desiccant bag inside the accumulator/drier becomes saturated with moisture, it can no longer protect the system. The result is excessive moisture contamination that can lead to compressor damage.

    Did you know? - Depending on your vehicle, you may have either an accumulator or a receiver-drier.

    BUY ACCUMULATOR NOW BUY RECEIVER DRIER NOW

    ORIFICE TUBE/EXPANSION VALVE

    This A/C component meters the flow of refrigerant to the evaporator core.

    Common Problem - Small particles of debris blocking the orifice. This debris is usually caused by a failing compressor or a ruptured desiccant bag. If the orifice becomes blocked the system will not be able to produce cool air.

    Did you know? - Depending on your vehicle, you may have either an orifice tube or an expansion valve.

    BUY ORIFICE TUBE NOW BUY EXPANSION VALVE NOW
    OTHER MAJOR COMPONENTS

    CONDENSER

    Designed to look and work like a radiator, the condenser cools the refrigerant upon leaving the compressor.

    Common Problem - Leaks and particles restricting the flow of refrigerant can lead to poor cooling.

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    EVAPORATOR

    The metered refrigerant entering the evaporator turns to a cold mist, which in turn makes the evaporator tubes cold. The blower motor pushes air across the cold tubes of the evaporator producing cold air.

    Common Problem - Leaks and particles restricting the flow of refrigerant can lead to poor cooling.

    BUY IT NOW

    This list is just of the major components to your air conditioning system. There are many more pieces that may be needed to complete a repair.


     
     
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