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2018 TLX 2.4L Base - AC Not Blowing Cold Air

0

Chris P. · rep 0 · May 26, 3:58 AM · 1 replies · solved · Question

Vehicle: 2018 Acura TLX 2.4L Base

I own a 2018 Acura TLX 2.4L Base model, and as the weather is heating up, I've noticed my AC isn't blowing cold air anymore. It just feels like regular fan air, even when set to the lowest temperature.

I haven't heard any strange noises, and the fan seems to be working fine. It was working perfectly last summer. What could be the cause of this sudden change? Is this a common problem for the 2.4L models?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:58 AM

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ClearTheCode admin answer:

An air conditioning system not blowing cold air is a common issue that can stem from several different causes. For your 2018 Acura TLX 2.4L, here's what to look into:

  1. Low Refrigerant (Freon): This is the most common reason. AC systems are sealed, but over time, small leaks can occur, leading to a loss of refrigerant. If the refrigerant level is too low, the AC compressor won't engage or won't be able to cool the air effectively.
  2. AC Compressor Failure: The compressor is the heart of the AC system, pressurizing the refrigerant. If it fails (clutch doesn't engage, internal failure), the system won't cool. You might hear a click when you turn on the AC if the clutch is trying to engage, or nothing at all if it's completely dead.
  3. Condenser Blockage or Damage: The condenser, usually located in front of the radiator, dissipates heat. If it's blocked by debris (leaves, dirt) or damaged (e.g., by road debris), it can't release heat, and the AC won't cool.
  4. Blower Motor Resistor/Blower Motor: While you mentioned the fan works, if it's not blowing with enough force, it could be a resistor issue. However, if it's blowing, but not cold, this is less likely to be the primary cause.
  5. Blend Door Actuator: Inside the dashboard, blend doors direct air over the heater core or evaporator. If an actuator fails, it might be stuck on 'heat' even when you select 'cold'.

Diagnostics:

  • There are typically no OBD-II codes for a simple lack of cold air unless there's an electrical fault in a sensor or actuator.
  • A professional will use AC gauges to check the high and low-side pressures of the refrigerant system. This quickly indicates if the system is low on refrigerant, if the compressor is working, or if there's a blockage.
  • They may also use a UV dye to detect leaks if refrigerant is low.

When to See a Shop:

  • It's best to take your TLX to an Acura dealership or an automotive AC specialist.
  • AC systems require specialized equipment to properly diagnose and recharge. Simply adding refrigerant from a can might temporarily work but won't fix a leak, and overcharging can damage the system.
  • Early diagnosis can prevent more expensive repairs, especially if it's a small leak or a failing component that could lead to compressor damage if ignored.
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