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2017 MDX A/C Not Blowing Cold - Cabin Filter or Refrigerant?

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Amanda S. · rep 0 · May 22, 5:00 AM · 1 replies · solved · Question

Vehicle: 2017 Acura MDX SH-AWD

Hey everyone,

My 2017 Acura MDX SH-AWD with about 80,000 miles on it isn't blowing cold air like it used to. It's especially noticeable on hot days; the air feels more like ambient temperature than actual cold. I've heard that a clogged cabin air filter can affect A/C performance, but I also wonder if it could be low refrigerant.

I replaced the cabin air filter about a year ago, but maybe it's time again? How can I tell if it's the filter or if I need a refrigerant recharge? Is checking the refrigerant level something I can do myself, or should I just take it to a shop?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:00 AM

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ClearTheCode admin answer:

It's frustrating when your A/C isn't performing as it should, especially in a 2017 Acura MDX. You're right to consider both the cabin air filter and refrigerant levels as potential culprits. Here's how to approach it:

  1. Check/Replace Cabin Air Filter:
    • Impact: A severely clogged cabin air filter can restrict airflow into the cabin, making the A/C feel weak, but it typically doesn't prevent the air from being cold. However, it's a cheap and easy first step.
    • Location: On your MDX, the cabin air filter is usually located behind the glove box. You can typically access it by opening the glove box, detaching the damper arm, and squeezing the sides of the glove box to allow it to drop further. The filter housing will then be visible.
    • Interval: While you replaced it a year ago, depending on your driving environment (dusty roads, pollen), it might need replacement every 15,000-20,000 miles or annually.
  2. Refrigerant Level Check:
    • DIY Check: You can purchase an A/C recharge kit with a gauge from an auto parts store. Connect it to the low-pressure service port (usually marked 'L' and larger) on your A/C system. The gauge will indicate if the pressure is low. Be cautious not to overcharge the system, as this can cause more damage.
    • Symptoms of Low Refrigerant: If the air is not cold at all, or only slightly cool, low refrigerant is a strong possibility. You might also hear the compressor cycling on and off more frequently.
  3. Other Potential Causes:
    • Condenser Blockage: Debris (leaves, bugs) can block the A/C condenser, located in front of the radiator, reducing its ability to dissipate heat.
    • Compressor Issues: A failing A/C compressor or clutch can prevent the system from cooling.
    • Leaks: Low refrigerant is often due to a leak in the system. Simply recharging without fixing a leak is a temporary solution.

When to See a Shop: If replacing the cabin air filter doesn't help, or if your refrigerant level is low, it's highly recommended to take your MDX to a professional A/C technician. They have specialized equipment to accurately diagnose leaks, evacuate the system, and recharge it to the precise specifications. Overcharging or improper handling of refrigerants can damage the system and is harmful to the environment. If you suspect a leak or a compressor issue, a professional diagnosis is essential.

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