ac low pressure drops to zero when running | Fixing Chevrolet Equinox AC Issues

The Chevrolet Equinox is a popular crossover SUV known for its spacious interior and comfortable ride. However, one issue that can arise with the AC system on this vehicle is low-pressure drops to zero when running. 

It can cause poor cooling performance and lead to the AC compressor not turning on. Not only can this be an inconvenience during hot weather, but it can also signal larger problems with the AC system.

We’ll discuss the symptoms, causes, and potential solutions for low-pressure drops in the AC of a Chevrolet Equinox that can help you troubleshoot and fix the issue and avoid further damage or costly repairs.

Symptoms of Low-Pressure Drops in the AC of a Chevrolet Equinox

When the AC system on a Chevrolet Equinox experiences low-pressure drops, it can lead to several symptoms that may indicate a problem. Some of these symptoms include 

Poor cooling performance

If the AC is not blowing as cold as it should or is having trouble keeping up with the temperature inside the vehicle, this could be a sign of low-pressure drops.

AC compressor not turning on

The AC compressor is responsible for pressurizing the refrigerant and circulating it through the AC system. If it is not turning on, it could be a symptom of low-pressure drops.

Warning lights or error codes on the dashboard

Some Chevrolet Equinox models are equipped with sensors that monitor the AC system. If there is a problem with the system, it may trigger a warning light or generate an error code.

Unusual noises from the AC system

Any unusual noise from the AC system, such as hissing, squealing, or rattling, may indicate low-pressure drops.

Note: It’s important to note that other issues, such as a leak in the refrigerant system or a failed compressor, may also cause these symptoms. So you need professional help if you’re experiencing any of these symptoms.

Causes of Low-Pressure Drops in the AC of a Chevrolet Equinox

There are a few common causes of low-pressure drops in the AC system of a Chevrolet Equinox. Some of the most common causes include:

Leak in the refrigerant system

A leak in the refrigerant system can cause low-pressure drops in the AC. The refrigerant is responsible for absorbing and releasing heat, so if there is not enough refrigerant in the system, the pressure will drop, and the system will not function properly.

Faulty compressor or compressor clutch

The compressor pressurizes the refrigerant and circulates it through the AC system. If the compressor or its clutch is faulty, it can cause low-pressure drops in the AC system.

Blockages in the AC lines or condenser

Blockages in the AC lines or condenser can impede refrigerant flow and cause low-pressure drops in the system. Debris or other foreign matter can build up in the AC lines or condenser, which can cause the pressure to drop.

Issues with the AC compressor control module or sensor

The AC compressor control module controls the compressor and maintains proper pressure levels in the AC system. If the module or sensor is faulty, it can cause low-pressure drops in the system.

Note: The expansion valve or other component failure can affect the AC system’s low-pressure drops. Therefore, it’s important to seek professional help if you’re experiencing any of these symptoms, to check your AC system and, determine the cause, then fix the issue accordingly.

How to Diagnose Low Pressure Drops in the AC of a Chevrolet Equinox

Diagnosing low-pressure drops in the AC system of a Chevrolet Equinox typically involves several steps, including:

Checking refrigerant levels

A qualified technician will use a pressure gauge to measure the pressure in the AC system and check for proper refrigerant levels. If the pressure is low, it may indicate a leak in the refrigerant system or a lack of refrigerant.

Inspecting the compressor and compressor clutch

Inspecting the compressor and compressor clutch is an important step in diagnosing low-pressure drops in the AC system of a Chevrolet Equinox. A qualified technician will perform the following checks during this step:

1. Visually inspect the compressor: The technician will look for any obvious signs of wear or damage, such as leaks, cracks, or other forms of damage.
2. Check the compressor’s shaft seal: The technician will check the compressor’s shaft seal, which can help detect refrigerant leaks.
3. Check the compressor’s drive belt: The technician will inspect the belt to ensure it is properly tensioned and not worn or damaged.
4. Inspect the compressor clutch: The technician will check it for proper operation, ensuring it engages and disengages properly.
5. Test the compressor for internal damage: If a compressor is suspected of being faulty, the technician can test it for internal damage by spinning it and listening for any unusual noise.

The technician can identify any issues causing low-pressure drops in the AC system and recommend the appropriate repairs. 

Note: Not all compressor and compressor clutch issues can be diagnosed by visual inspection alone, and the technician may need to perform further testing or measurements to confirm the diagnosis.

Checking for blockages in the AC lines and condenser

The technician will use specialized tools to inspect the AC lines and condenser for any blockages, such as debris or foreign matter.

Testing the AC compressor control module or sensor

The technician will use a scan tool to check the operation of the AC compressor control module or sensor and whether it is working properly.

After the diagnosis, the technician can determine the cause of the low-pressure drops and recommend the necessary repairs or replacements.

How to Fix Low-Pressure Drops in the AC of a Chevrolet Equinox

Once the cause of low-pressure drops in the AC system of a Chevrolet Equinox has been diagnosed, a qualified technician can proceed with the necessary repairs.

The specific fix will depend on the cause of the problem, but some common solutions include the following.

Refilling refrigerant

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If a leak in the refrigerant system is the cause of low-pressure drops, the technician will need to locate and repair the leak before refilling the refrigerant.

Replacing the compressor or compressor clutch

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If the compressor or compressor clutch is found faulty, it will need to be replaced.

Clearing blockages in the AC lines or condenser

If blockages are found in the AC lines or condenser, the technician will need to clear them to restore the proper flow of refrigerant and pressure.

Replacing the AC compressor control module or sensor

If the AC compressor control module or sensor is found to be faulty, it will need to be replaced.

Updating software, recalibrating, or replacing other components: in some cases, other components, such as the expansion valve, evaporator sensor, or dryer, may need to be replaced or updated.

Note: It’s worth noting that preventative maintenance, such as regular inspection and service, can help prolong the AC system’s life and prevent future low-pressure drops.

Prevention and Maintenance of Low-Pressure Drops in the AC of a Chevrolet Equinox

Preventing low-pressure drops in the AC system of a Chevrolet Equinox requires regular maintenance and timely diagnosis of any issues that may arise. Some steps you can take to prevent low-pressure drops include:

Regularly checking refrigerant levels

Regular Checking of the refrigerant levels in the AC system can help to detect any leaks or low levels, which can cause low-pressure drops.

Periodically inspecting the AC system for leaks or blockages

Inspecting the AC system for leaks or blockages can help prevent low-pressure drops and improve the system’s performance.

Scheduling regular maintenance for the AC system

Regular maintenance, such as cleaning the AC lines and condenser, can help improve the system’s performance and prevent low-pressure drops.

Using high-quality refrigerant

High-quality refrigerant compatible with the AC system can help to prevent leaks and low-pressure drops.

Keeping your car running smoothly

Regularly servicing your car and keeping its component in good condition can prevent sudden low-pressure drops that might happen due to other components’ failure.

Note: Regularly performing these preventative measures can help prolong the AC system’s life and prevent low-pressure drops from occurring with the AC system of your Chevrolet Equinox.

FAQs

We will answer some of the most commonly asked questions about the low-pressure drops occurring with the Chevrolet Equinox AC system.

Can I add refrigerant to the AC system if the low-pressure drops to zero in my Chevy Equinox?

While it is technically possible to add refrigerant to the AC system yourself, it is not recommended. Adding refrigerant to an AC system low on pressure can be dangerous and must be done by trained professionals.

Is low-pressure drops to zero in the AC system a common issue in Chevy Equinox?

No, it is not a common issue, but it can happen. It’s important to have the issue diagnosed and repaired by a certified technician to prevent further damage and ensure the proper functioning of the AC system.

Will low-pressure drops to zero in the AC system affect the performance of other systems in my Chevy Equinox?

Yes, It can affect the performance of other systems in your Chevy Equinox, such as the engine or transmission, if it is not addressed.

Conclusion

When experiencing low pressure in the AC system, it’s highly recommended to have a certified mechanic inspect the vehicle as soon as possible to prevent further damage.

The mechanic can diagnose the problem and repair or replace the necessary components. Regular maintenance and inspections are essential to keep your ride smooth and comfortable.