How to Replace an A/C Compressor?

The AC compressor is the heart of your vehicle's air conditioning system and compresses and circulates the refrigerant. The AC compressor's job is to exchange the refrigerant through the heat cycle of the evaporator and condenser. Like any other component in heavy equipment, the AC compressor can become damaged due to age and mechanical failure. When this happens, the AC compressor can no longer function properly. Replacing a cheap AC compressor, cheap AC condenser, or other component in your air conditioning system is important. In this article, MyMROmarts highlights the tools and safety precautions needed to replace an AC compressor, specific steps to replace the compressor, and solutions to common problems.

 

Tool Preparation for Replacing Air Conditioning Compressor

Before learning how to replace a/c compressor, you should know the tool preparation for replacing air conditioning compressor.

1. Get ready to remove and replace the bolts and nuts on the air conditioner by getting a wrench and socket wrench set ready.

2. Get a screwdriver ready to take out the air conditioning compressor's fastening screws.

3. Get ready to securely collect refrigerant from the air conditioning system by assembling refrigerant recovery equipment.

4. Set up a vacuum pump so that, when the compressor is replaced, the air conditioning system may be cleaned of moisture.

5. Get fresh refrigerant ready for refrigerant recharge.

 

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Safety Precautions for Replacing an Air Conditioning Compressor

1. Refrigerant is flammable, so keep away from fire during actual operation.

2. When handling the air conditioner compressor and refrigerant, be gentle to avoid leakage.

3. Disconnect the power supply of the air conditioner before performing maintenance work.

4. When handling refrigerant, use equipment to recover the refrigerant to avoid environmental pollution.

5. During operation, you need to wear appropriate protective gloves to prevent damage from refrigerant.

6. Strictly follow the instructions in the operating manual to avoid risks caused by illegal operations.

 

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Steps to Replace the Air Conditioning Compressor

Step 1: Recover the Refrigerant.

Use a refrigerant recovery machine to completely recover the refrigerant in the air conditioning system, making sure there is no residual refrigerant inside the system.

 

Step 2: Remove the Air Conditioning Compressor Belt.

Find the belt of the air conditioning compressor and remove it. You may need to loosen other belts to find it.

 

Step 3: Remove the Old Compressor.

1. Use a screwdriver to remove the screws of the air conditioning housing and remove the housing.

2. Use a screwdriver to disconnect all wires from the compressor, remembering the location and connection method of each wire.

3. Use a wrench to disconnect the refrigerant pipeline from the air conditioning compressor, paying attention to avoid refrigerant leakage.

4. Use a socket wrench to remove the compressor fixing bolts and remove the old compressor.

 

Step 4: Install the New Compressor.

1. Place the new air conditioning compressor in the correct position and fix it in place with a socket wrench.

2. Reconnect the refrigerant pipeline and confirm that all connection lines are tightly connected.

3. Reconnect the wires of the air conditioning compressor according to the wire connection method recorded previously.

 

Step 5: Check for Leaks and Vacuum the System.

1. Use a pressure gauge set to check for leaks in the air conditioning system.

2. Use a vacuum pump to vacuum the air conditioning system to ensure that there is no moisture or air residue inside the system.

 

Step 6: Re-Inject Refrigerant.

Re-inject an appropriate amount of refrigerant into the air conditioning system. Then restore the air conditioning power supply, start the air conditioning, observe the system operation, and confirm that the air conditioning compressor is working properly.

 

Frequently Asked Questions About Replacing an Air Conditioning Compressor

1. The Compressor Is Running but Not Cooling

It might be brought on by a blocked condenser or evaporator, inadequate or seeping refrigerant, or both. The fix is to clean the condenser and evaporator, check the refrigerant pressure, and add refrigerant.

 

2. The Compressor Is Noisy

A loud compressor indicates a problem within the unit or maybe loose fastening nuts. Verify again and tighten every bolt. It is advised that the customer replace the compressor with a new one if the issue continues.

 

3. The Compressor Is Difficult to Start

Maybe there's an electrical malfunction. Inspect every electrical circuit and capacitor, and swap out any broken components.

 

4. Refrigerant Leakage

Incorrect refrigerant pipe connections or broken seals are the causes of this. Make that the connecting pipes and seals are in good condition and replace them as needed.