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2017 Enclave A/C only blowing warm air, what should I check?

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Heather Y. · rep 0 · May 22, 3:54 AM · 1 replies · solved · Question

Vehicle: 2017 Buick Enclave Premium

Hello everyone, I'm having a major problem with the A/C in my 2017 Buick Enclave Premium. It's suddenly stopped blowing cold air. The fan works fine, I can hear it blowing, but it's just warm air coming out of the vents.

I tried getting it recharged at a local shop, and they said it took some refrigerant, but it still didn't fix the issue. It was working perfectly fine a few weeks ago, and now nothing. It's getting hot out here, and I really need my A/C!

What are the common culprits for this in a 2017 Enclave? Is there anything I can check myself before taking it to a specialized A/C shop?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:54 AM

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ClearTheCode admin answer:

An A/C system blowing warm air in your 2017 Buick Enclave can be due to several issues, even after a recharge. Here's a breakdown of what's likely happening and what to check:

  1. Refrigerant Leak:

    • Cause: If the system took refrigerant but still isn't cold, it strongly suggests a leak. The refrigerant simply escaped again, or there wasn't enough to begin with due to a larger leak. Common leak points include the condenser, evaporator, hoses, or O-rings.
    • Action: A professional A/C shop uses specialized leak detection tools (UV dye, electronic sniffers) to pinpoint the exact location of the leak. Simply recharging without fixing the leak is a temporary, ineffective solution.

  2. Faulty A/C Compressor:

    • Cause: The compressor is the heart of the A/C system, pressurizing the refrigerant. If it's not engaging or is failing internally, the system won't cool. You might hear a distinct click when the A/C is turned on if the clutch engages, or nothing if it's faulty.
    • Action: Visually inspect the compressor clutch to see if it's spinning when the A/C is on. If it's not, it could be an electrical issue (fuse, relay) or a failed compressor. Diagnostic codes like P0530 (A/C Refrigerant Pressure Sensor Circuit Malfunction) or P0531 (A/C Refrigerant Pressure Sensor Circuit Range/Performance) can sometimes indicate compressor-related issues.

  3. Clogged Condenser:

    • Cause: The condenser, located at the front of the vehicle, dissipates heat. If it's clogged with debris (leaves, dirt, bugs), it can't effectively cool the refrigerant.
    • Action: Visually inspect the condenser fins for blockages. Gently clean with water and a soft brush if accessible.

  4. Blend Door Actuator Failure:

    • Cause: This actuator controls which air (hot or cold) flows into the cabin. If it's stuck on 'hot' or malfunctioning, you'll only get warm air.
    • Action: This usually requires professional diagnosis, as it's often located behind the dash. You might hear clicking noises from behind the dashboard if it's failing.

When to See a Shop: Given that a recharge didn't fix the problem, it's crucial to take your Enclave to a reputable A/C specialist or a Buick dealership. They have the equipment to properly diagnose leaks, test compressor function, and check for electrical faults within the A/C system. Continuing to run a system with a leak can draw moisture in, causing further damage.

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