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2018 TLX AC Blowing Warm Air - Compressor Issue?

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Eric V. · rep 0 · May 22, 5:02 AM · 1 replies · solved · Question

Vehicle: 2018 Acura TLX V6 Tech

Hey everyone,

I'm having a major problem with the air conditioning in my 2018 Acura TLX V6 Tech. It's suddenly started blowing warm air, even when the AC is set to its lowest temperature and fan speed is high. It was working perfectly fine just a few weeks ago, and now it's basically useless.

I've checked the cabin air filter, and it looks okay. I'm worried it might be something serious like the AC compressor, which I know can be an expensive fix. Has anyone with a 2016-2018 TLX experienced this? What was the cause and how much did it cost to repair?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:02 AM

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ClearTheCode admin answer:

  1. Symptoms: Your 2018 Acura TLX blowing warm air when the AC is on indicates a problem within the air conditioning system. This can range from a simple refrigerant leak to a more significant component failure.

  2. Common Causes: The most frequent causes for an AC system blowing warm air include:

    • Low Refrigerant (Freon): This is often due to a leak somewhere in the system (hoses, condenser, evaporator, or O-rings).
    • Faulty AC Compressor: The compressor is responsible for pressurizing the refrigerant. If it fails, the system won't cool.
    • Bad Condenser: If blocked or damaged, it can't dissipate heat effectively.
    • Electrical Issues: A blown fuse, faulty relay, or wiring problem preventing the compressor clutch from engaging.
    • Blend Door Actuator: Less common, but a stuck blend door can prevent cold air from reaching the cabin.

  3. Initial Checks: You can visually inspect the compressor clutch to see if it's engaging when the AC is turned on. If it's not spinning, it could be an electrical issue or a seized compressor. Also, check the AC system fuses in your owner's manual.

  4. When to See a Shop: An AC system requires specialized tools for diagnosis and repair, especially when dealing with refrigerant. You should take your TLX to an Acura dealership or a reputable automotive AC specialist. They will perform a diagnostic check that typically includes:

    • Pressure Test: To check refrigerant levels and identify leaks.
    • Visual Inspection: For leaks, damaged components, or electrical issues.
    • System Scan: To check for any HVAC-related fault codes.

  5. Diagnostic Codes: While a direct AC compressor failure might not always trigger a Check Engine Light, a specialized HVAC system scan tool might reveal codes like B1241 (Refrigerant Pressure Sensor Malfunction) or B1242 (Compressor Clutch Circuit Malfunction), which can help pinpoint the problem.

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