Learn the easy way to reset your GMC Acadia AC with my simple guide. I’ll help you fix common issues like hot air or not enough cooling.

Keeping your AC system in check regularly stops big problems later. With the right knowledge, you can sort out problems and keep your system working well, saving you money on repairs. A well-kept GMC Acadia AC means lots of comfort, especially on hot days.

What are Common Problems with GMC Acadia AC?

Dealing with a cranky AC in your GMC Acadia can be a real bother, especially when the weather’s playing up. Let me walk you through the common issues and simple solutions for your car’s cooling system.

1. GMC Acadia AC Not Working

Problem: You crank up the AC, but… nada! Frustrating, right? Here’s why it might be happening and what you can do:

  • Low Refrigerant Levels: Your car’s AC needs the right amount of refrigerant to cool things down. Low levels can mess it up. Top it up or get a pro to recharge it.
  • Blown Fuse: Sometimes, a blown fuse can be the culprit behind your AC throwing a fit. Swap it out, and your AC might just spring back to life.
  • Faulty Compressor: This part’s vital for circulating refrigerant. If it’s acting up, your AC won’t work. Time to fix or replace it.

2. GMC Acadia AC Blowing Hot Air

Problem: Instead of chill vibes, your AC’s blowing hot air. Not cool! Here’s what could be happening:

  • Low Refrigerant Levels: Yup, low levels strike again! Refill or recharge to get that cool breeze back.
  • Clogged or Dirty Condenser: A gunked-up condenser means your AC’s playing tricks on you. Clean it out or get a new one to sort this issue.
  • Faulty Compressor: Just like before, a faulty compressor can be the troublemaker. Get it fixed or swapped out by a pro.

3. GMC Acadia AC Not Cooling

When your AC isn’t doing its job, a few things might be causing the trouble:

  • Dirty/Clogged Air Filter: A dirty filter slows down the cool air. Try cleaning or changing the filter for better airflow.
  • Thermostat Trouble: If the thermostat’s acting up, it messes with the cooling. Swapping it out could do the trick.
  • Damaged Condenser: A damaged condenser affects AC performance. Fixing or replacing it might get things back on track.

4. GMC Acadia AC Compressor Issues

Let’s check on the compressor:

  • Electrical Connections: Faulty connections can mess with the compressor. Make sure they’re all good and replace anything that’s broken.
  • Clutch Check: The compressor uses a clutch to work. Look for damage and replace if needed.
  • Pulley and Belt Check: Worn-out parts can make the compressor act funny. Check and replace them if they’re worn.

How to Reset GMC Acadia AC

Resetting your GMC Acadia’s AC system is simple and ensures it works perfectly. I followed the steps shared on JustAnswer: [1]

  • Clear DTCs: Use a scanner or code reader to clear any Diagnostic Trouble Codes stored in your car’s computer system.
  • Ignition Off: After clearing codes, turn off the ignition.
  • Install HVAC Actuator: Find and install the HVAC actuator properly.
  • Reconnect: Make sure all disconnected components are securely reconnected.
  • Remove Fuse: Take out the HVAC/ECAS fuse from the fuse box and keep it off for at least 10 seconds.
  • Reinstall Fuse: After 10 seconds, put the HVAC/ECAS fuse back in place.
  • Start the Car: Turn the ignition on and start your car.
  • Self-Calibration: Let your vehicle run for 40 seconds to let the HVAC control module self-calibrate.
  • Check for DTCs: Use your scanner to ensure no new DTCs have been set.

Once you’ve reset your GMC Acadia’s AC, test it to confirm everything’s working. If any issues persist, it’s wise to consult a professional mechanic for further assistance.

GMC Acadia AC Troubleshooting

Making sure your GMC Acadia’s AC works well isn’t just about resetting it. I’ll explain some easy steps to fix common issues with your AC system:

  • Check the AC Compressor: This part helps circulate refrigerant for cooling. Look for damage or wear. If it’s not working right, warm air might come out of your AC.
  • Monitor Refrigerant Levels: Low levels mean warm air from your AC. Make sure the refrigerant is enough. If it’s low, add more to get it to the right level.
  • Search for Leaks: Leaks in your AC system lower the refrigerant levels. Use a detector to find and fix any leaks.
  • Inspect the AC Condenser: This cools the refrigerant before it reaches the evaporator. If it’s damaged or blocked, your AC might blow warm air.
  • Check the AC Evaporator: It takes heat from your car and gives it to the refrigerant. If it’s dirty or clogged, your AC won’t work well, and you might feel warm air.

Maintenance and Replacement of GMC Acadia AC Parts

Let’s talk about a couple of essential things you can do to take care of its AC system—recharging and replacing the AC filter.

1. Recharge your GMC Acadia AC

When your Acadia’s AC starts blowing warm air, it might just need a recharge. No need to stress, it’s a simple process:

  • Get a compatible refrigerant kit for your GMC Acadia’s AC system.
  • Find the low-pressure port—it’s usually on the bigger hose between the compressor and evaporator.
  • Link up the recharge hose with the low-pressure port.
  • Turn on your vehicle and crank the AC to the coldest setting.
  • Open the valve on the recharge hose to let the refrigerant into the AC system.
  • Watch the pressure gauge on the hose. Once it hits the right level, close the valve and disconnect the hose.

2. GMC Acadia AC filter replacement

Now, about replacing the AC filter — this part works hard to keep the air clean inside your car. Here’s what you should do:

  • Look for the AC filter compartment behind the glove compartment.
  • Pop open the glove compartment and remove the stops on both sides so it drops down.
  • Find and take off the filter compartment cover.
  • Swap out the old filter for a new one.
  • Put the filter compartment cover back and secure the glove compartment stops.

GMC Acadia AC pressure: high and low pressure causes and solutions

In GMC Acadia cars, the AC works using high and low pressure. High pressure is when the compressor pushes air out, and low pressure is when it sucks air in.

Here’s what you need to know about what causes these pressures and how to fix them:

1. High Pressure

  • Condenser Issues: If it’s clogged or damaged, replace it, so air can flow properly.
  • Too Much Refrigerant: If there’s an overcharge, get the right amount put in.
  • Faulty Compressor: If it’s not working right, swap it out to keep things running smoothly.

2. Low Pressure

  • Blocked Orifice Tube: Clean or replace it to keep the refrigerant flowing well.
  • Low Refrigerant: Recharge it with the right amount to restore proper pressure.
  • Faulty Compressor: Just like with high pressure, changing the compressor can fix low-pressure problems for better performance.


Taking care of your GMC Acadia’s AC is important to save money and stay cool in hot weather. Simple tasks like resetting the system, fixing issues, and changing parts help a lot.

Follow the manual for maintenance guidance. Recharge the AC, replace the filter, and learn about AC pressure – these are easy things you can do yourself.

If you’re unsure or have complex issues, it’s best to ask a professional for help. They’ll ensure your AC gets fixed properly. Stick to the manual to keep your AC working well and enjoy comfortable drives.