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2017 RDX AC Only Blowing Warm Air - Compressor Issue?

0

Mike T. · rep 0 · May 26, 3:40 AM · 1 replies · solved · Question

Vehicle: 2017 Acura RDX Advance

Hey everyone,

I'm having a problem with the air conditioning in my 2017 Acura RDX (FWD, Advance trim). It was working perfectly fine until a few days ago, and now it's only blowing warm air. The fan works at all speeds, and I can hear it blowing, but there's absolutely no cold air coming out.

I haven't noticed any strange noises or smells, and there are no warning lights on the dash. I'm wondering if it's something simple like needing a recharge, or if it could be a more serious issue like the AC compressor. Has anyone else with a 2017 RDX experienced their AC suddenly stop working like this?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 26, 3:40 AM

0

ClearTheCode admin answer:

An AC system suddenly blowing only warm air in your 2017 Acura RDX can be due to several common issues. Here's a diagnostic approach:

  1. Refrigerant Level: The most common cause is low refrigerant. A leak in the system can cause the pressure to drop, preventing the compressor from engaging. A professional AC service can evacuate the system, check for leaks, and recharge it to the correct specification.
  2. AC Compressor Clutch: Even if the compressor itself is good, the clutch that engages it might be failing. When you turn on the AC, listen for a distinct 'click' sound as the compressor clutch engages. If you don't hear it, or if it tries to engage but fails, the clutch or its electrical circuit (fuse, relay) could be the problem.
  3. AC Compressor Failure: If the clutch engages but still no cold air, the compressor itself might be faulty internally. This often comes with grinding or whining noises, but not always.
  4. Condenser Blockage/Damage: The condenser, located in front of the radiator, dissipates heat. If it's blocked by debris or damaged (e.g., from a road hazard), the system won't cool effectively.
  5. Blend Door Actuator: This actuator controls whether hot or cold air enters the cabin. If it's stuck in the 'hot' position, you'll only get warm air. This is usually accompanied by a clicking sound from behind the dash.
  6. Pressure Switch: The AC system has high and low-pressure switches that prevent the compressor from running if pressures are outside safe operating limits (e.g., due to low refrigerant). A faulty switch can incorrectly report pressure, preventing the compressor from engaging.

Diagnostics:

  • A professional AC system check involves connecting gauges to measure high and low-side pressures. This quickly indicates if refrigerant is low or if there's a blockage.
  • An OBD-II scan tool might reveal codes like P0530 (AC Refrigerant Pressure Sensor Circuit) if a sensor is faulty.

When to see a shop:

  • Immediately, as prolonged running of a low-refrigerant system can damage the compressor.
  • If you're not comfortable working with refrigerants, as they require specialized equipment and handling.
  • An AC specialist or Acura dealership can accurately diagnose the root cause, repair any leaks, and properly recharge the system.
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