A/C Expansion Valve Guide for the 2012-2017 Buick Verano
Is your Buick Verano's A/C blowing warm? Here's what you need to know about the A/C expansion valve.
- Before blaming the expansion valve, have a mechanic check for issues described in TSB PI0558B (faulty pressure sensor) and TSB 15598 (faulty compressor).
- Symptoms of a bad expansion valve include warm A/C, inconsistent temperatures, and frost from vents.
- Replacing the expansion valve requires special tools to evacuate and recharge the A/C system; professional service is recommended.
- Always replace the receiver/drier when the A/C system is opened to prevent future damage.
Is Your Verano's A/C Blowing Warm Air?
If the air conditioning in your 2012-2017 Buick Verano isn't as cold as it used to be, or is blowing warm air completely, a faulty A/C expansion valve could be the problem. However, before you replace the expansion valve, it's important to be aware of other common issues with these vehicles.
Important TSB Information for Verano Owners
General Motors has issued Technical Service Bulletins (TSBs) that may relate to your A/C issue. A TSB is not a recall, but it is a notice to dealerships about a known problem with a potential solution.
- TSB PI0558B: For the 2012 Buick Verano, some vehicles may have an issue where the A/C refrigerant pressure sensor reads incorrectly, which can cause the A/C to blow warm air. This can be due to a faulty sensor or water getting into the connector. A technician should check if the sensor's reading matches the actual system pressure before suspecting other parts.
- TSB 15598: Some 2015 Verano models may have been built with A/C compressors that can lead to a loss of refrigerant and cause the air conditioning to fail.
Given this information, it's wise to have a certified mechanic rule out these specific issues before deciding to replace the expansion valve.
Symptoms of a Failing A/C Expansion Valve
While other issues should be checked first, a failing expansion valve has distinct symptoms. If your mechanic has ruled out other problems, look for these signs:
- Inconsistent Air Temperature: The air from your vents may switch between cold and warm. This can happen if the valve is sticking, failing to properly regulate refrigerant flow.
- A/C Blows Only Warm Air: If the expansion valve is stuck closed, it will restrict refrigerant from entering the evaporator, resulting in no cool air.
- Frost on A/C Components: An expansion valve stuck open can allow too much refrigerant into the evaporator. This can cause frost to form on the evaporator or even be blown out of the vents.
- Hissing Sound from the Dash: An unusual hissing noise from the dashboard area can sometimes indicate a problem with the expansion valve as refrigerant flows through it improperly.
Choosing the Right Aftermarket Part
When replacing the A/C expansion valve on your Verano, you don't have to buy the expensive OEM part. Aftermarket brands offer a reliable alternative at a better price. The OEM part is manufactured by GM, while AC Delco is GM's official parts brand. Aftermarket options like Four Seasons and Global Parts (GPD) are widely available.
- OEM/AC Delco: This is the original part your car was built with. It guarantees a perfect fit but comes at the highest cost.
- Four Seasons: A well-known and generally trusted aftermarket brand for A/C components. Many professional mechanics use their parts. While quality can vary by specific part, they are often considered a solid choice.
- Global Parts (GPD): Another popular aftermarket option that provides a budget-friendly solution.
Pro Tip: When replacing an expansion valve, it is highly recommended to also replace the A/C system's receiver/drier (or accumulator). Opening the system exposes this component to moisture, and a new one is essential for the longevity of your A/C compressor and overall system performance.
Cost to Replace the A/C Expansion Valve
The total cost will depend on whether you do it yourself or hire a professional. The job requires specialized equipment to evacuate and recharge the A/C system.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Part | $60 - $172 |
| New Aftermarket Part | $34.87 - $63.27 |
| Shop Labor | $171 - $266 |
| Total Professional Replacement | $343 - $460 |
Frequently Asked Questions (FAQ)
Where is the A/C expansion valve located on a 2012-2017 Buick Verano?
The expansion valve is located on the firewall in the engine bay, where the A/C lines connect to the evaporator core.
Can I replace the expansion valve myself?
While physically replacing the valve is possible for an experienced DIYer, the A/C system must be legally and safely evacuated of refrigerant before starting and then properly recharged and tested for leaks afterward. This requires specialized equipment, so this job is typically best left to a professional shop.
Should I use an A/C stop-leak product?
It is generally not recommended. These products can clog not only small leaks but also critical components like the expansion valve, condenser, and evaporator, leading to more expensive repairs down the road.
Does my Verano use an expansion valve or an orifice tube?
The 2012-2017 Buick Verano uses a block-type A/C expansion valve. Some systems use a simpler orifice tube, but that is not the case for this vehicle.
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Technical Specifications
OEM Part Numbers: 13313727 20782085 13265194
Block-type expansion valve
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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