The largest online repair guide library for every car

About us
Contact support
FAQ
Sign up
Sign in

2017 MDX A/C Not Cold - What should I check first?

0

Chris P. · rep 0 · May 22, 5:01 AM · 1 replies · solved · Question

Vehicle: 2017 Acura MDX SH-AWD

Hey everyone,

My 2017 Acura MDX SH-AWD, with about 80,000 miles, has an issue with the air conditioning. It's blowing air, but it's just not getting cold, especially on hotter days. It feels like it's just circulating ambient air. The fan works fine, and I don't hear any strange noises when I turn the A/C on.

I'm hoping it's something simple I can check myself before taking it to a shop. What are the most common reasons for an A/C to stop blowing cold in these MDX models? Is it usually just low refrigerant, or could it be something more serious like the compressor? Any DIY tips or things to look for would be super helpful!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:01 AM

0

ClearTheCode admin answer:

It's frustrating when your A/C isn't blowing cold, especially in an Acura MDX. This is a common issue across many vehicles as they age. Here's a breakdown of common causes and what you can check:

  1. Low Refrigerant (R-134a): This is the most frequent cause. Over time, refrigerant can slowly leak out of the system. Even a small leak can significantly reduce cooling performance. You can buy an A/C recharge kit with a gauge from an auto parts store to check the pressure. If it's low, adding refrigerant might temporarily fix it, but a leak will eventually cause the problem to return. Look for oily residue around A/C lines and components, which can indicate a leak.
  2. Condenser Blockage or Damage: The condenser, located in front of the radiator, dissipates heat. If it's clogged with debris (leaves, bugs) or damaged by road debris, it won't cool the refrigerant effectively. Visually inspect it for blockages or bent fins.
  3. A/C Compressor Failure: The compressor is the heart of the A/C system, pressurizing the refrigerant. If it fails, the system won't cool. When you turn on the A/C, listen for the compressor clutch to engage (a distinct click) and observe if the center of the compressor pulley spins. If it doesn't engage, the compressor might be faulty, or there might be an electrical issue (e.g., a blown fuse or relay).
  4. Blend Door Actuator: Inside the dashboard, blend doors control whether hot or cold air enters the cabin. If an actuator fails, it might be stuck on the 'heat' setting, even if the A/C system is working. You might hear clicking noises from behind the dash if an actuator is failing.
  5. Electrical Issues: A blown fuse for the A/C clutch or a faulty pressure switch can prevent the system from engaging. Check your owner's manual for the location of A/C related fuses.

When to See a Shop:

  • If adding refrigerant doesn't restore cooling, or if it quickly leaks out again.
  • If the compressor isn't engaging, and fuses are confirmed good.
  • If you suspect a major leak, compressor failure, or a blend door issue.
  • If you get any A/C related OBD codes (e.g., P0530 - A/C Refrigerant Pressure Sensor Circuit Malfunction).

For a proper diagnosis of leaks or compressor issues, specialized equipment is needed. Start by checking the refrigerant level and visually inspecting the condenser.

Menu

Help & account