You will need a set of AC pressure gauges to check the following. Your Your engine runs on combustion – fire – which creates exhaust gases. Compressor – This unit compresses and brings the refrigerant to circulate in the system. An air conditioning system pressure switch can disrupt the circuit if certain pressures are not met or if the switch is failing. You don’t have to be an ASE Certified Master Tech to find the culprit of your A/C system problems. Though these are the primary components of the air conditioning system, your vehicle has a series of electrical circuits that allow it to function, as well as a dash system that contains numerous doors that move within the dash that can affect effectiveness. You won’t be able to try this method with evaporator or compressor front seal leaks. Made with ♥ in Silicon Valley. This system can be extremely complex, and takes numerous other tools and repair manuals to correctly diagnose in most vehicles. You will test the O rings first since this is a common place for leaks to occur. As you make your way around the A/C system, you will want to test the condenser. The clutch is engaging but the air not cold. Warning: Never install the gauges with the system running. Warning: Never add anything but the recommended refrigerant to the AC system. Warning: Do not check for pressure by pressing on the fitting to see if refrigerant comes out. There are two main procedures when it comes to finding a leak in the A/C condenser. When performing any air conditioning system service you must have the proper tools - and exercise caution when using them. If you suspect you’ve got an AC condenser leak, there are two ways to check. A failing AC low pressure hose may cause a lack of cold air from the AC system. Told me what was wrong with my AC Clutch. Step 6: Reach desired pressure. Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools. A more obvious sign of condenser failure will be a noticeable leak. While I realize this is a pain, it’s the only way to ensure that your air conditioning works properly. He also told me about future minor repairs that should be made & prepared a Quote for me that I could review in my account. While it might look like an easy solution, be forewarned, you might end up with bigger problems. Step 1. If the air conditioning still does not work as desired further … Even the smallest amount of wind causes the Freon to show up in areas away from the leak location. You also want the engine to be turned off. If the pressures do not change at all when the compressor engages then the compressor has failed or there is a problem with the metering device. If at some point in the car’s life, trace dye has been added to the A/C system, the leak will appear bright green in color (always pay attention to the color of the fluid leaking from … When the condenser leaks, depending where and how big the leak is, all of the high pressure refrigerant can and will eventually leak out, disabling the entire AC system. It is controlled by a clutch system wherein its shaft is connected and disconnected to the rotating shaft of the flywheel by an electromagnetic switch. Any sudden changes in temperature indicate a restriction in the condenser. An AC clutch compressor is a type of compressor that derives its power from the car engine’s flywheel. William did an awesome job & explained the repairs to me in lay terms. Over time, the condenser can begin to leak either due to age or damage. YourMechanic All rights reserved. If performing these steps did not achieve cold air from your vents or you are not comfortable with doing this work, you need to enlist the help of a certified mechanic who has the tools and the knowledge to test your air conditioning system. You have to examine this is your AC is ineffective. Nissan Altima - Car AC Repair - Oviedo, Florida. Final Note About Car A.C. How Does a Car’s Air Conditioning Work? Any AC system requires a refrigerant, such as R-134a. The condenser which is positioned in the front of the vehicle is subject to small rocks and other road debris which can easily get damaged and will leak. © If the belt is slipping, you’ll probably hear some squeaking or squealing noise. A non-contact infrared thermometer can be used to check for restrictions. Step #1: Make sure the system is full of Freon. This is dangerous and it is illegal to vent refrigerant into the atmosphere. Step 2: Install the gauges. You have to ensure that the clutch is rotating without any difficulty. Below are the most common causes of poor air conditioning performance and what can be done to get you comfortably back on the road. If a small leak is present, you may be able to repair it with a Stop Leak product. Inspect the clutch located at the front of the AC compressor and make sure the clutch rotates freely. This will be the place where the condensers are located in most of the vehicles manufactured these days. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. Ford Ranger - Car AC Repair - Glendale, Arizona. Hyundai Sonata - Car AC Repair - Orlando, Florida, He was great even though it was a repair that could not be done he was helpful about giving me the info I needed. Observe the gauge on the kit and begin adding the refrigerant whether it be with a button or a trigger on the kit. … You must check the owner’s manual before adding more oil. Step 7: Check the air temperature. But periodic testing of the condenser in the car might (sometimes) disclose a deteriorating condition before it actually fails. Component 4: Metering device. Pressure gauges can be used to check the refrigerant charge. AC Orifice Tube / Expansion Valve. As the condenser converts refrigerant, residue tends to remain at the bottom. A slipping belt also won’t drive the compressor reliably. The second cause is that there is a blockage caused by metallic debris. The compressor clutch will usually be located under... 3. The condenser tubes can’t be replaced, so you need a new condenser if it cracks or breaks. First, start with a visual inspection. Copyright ©2020 CarParts.com, Inc. All Rights Reserved. This might lead to a false reading. Connect a pressure gauge to the low side of the AC compressor, typically found on the firewall passenger side in the engine compartment. If the readings are very high then you may have a problem with air trapped in the system or an airflow problem with the condenser. That’s why you must perform diagnostics at the first sign of trouble. Reason 3: Moving parts. On most cars, the air conditioner compressor is run by a V-belt or serpentine belt. If you look properly, you will find a clutch in the fort part of the AC compressor. There are seals on the part that leak with normal wear and tear. Make sure that you do not overcharge the system as too much refrigerant is just as bad - if not worse - than too little. P2613 OBD-II Trouble Code: A/C Refrigerant Distribution Valve Control Circuit High, How to Troubleshoot a Small Engine Problem, Symptoms of a Bad or Failing AC Low Pressure Hose. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. Just fixed it today . The feature of a clutch is to rotate and if the rotation is prevented in any way, the compressor will not work. My back in the cold ✊, Ford Thunderbird - Car AC Repair - Winter Park, Florida. Turn the air conditioning on in the vehicle and see if that clutch that was previously stationary is now engaged. Use the key to start the car and … This would need to be diagnosed separately. Airflow problems can be caused by anything from a blower motor problem to an electrical issue or a module failure. Identifying the Issue Start the vehicle and turn on the air conditioner. However if the fans do not work properly the vehicle will overheat. Checking your pressures is the next logical place to start. If your system doesn’t show any immediate signs of leakage, then you want to purchase a leak detector. Please see our, Jeep Grand Cherokee - Car AC Repair - Waddell, Arizona. More up to date systems are computer controlled and use numerous other inputs including vehicle interior and exterior temperature to determine whether or not to turn the compressor on. A wide range of gases are produced during normal operation, and they must be controlled because many of them become pollutants when released into the atmosphere. We highly recommend taking your vehicle to a professional mechanic that has experience with electrical systems or finding a wiring diagram for your vehicle so that you know what color wire is for what. Many times, bad evaporators, leaks in the lines or a lack of refrigerant can cause the same symptoms. As you examine the condenser, don’t forget to look at the hose connections as well. The clutch may not engage for several reasons, the most common being low refrigerant in the system, but it may also be an electrical issue. 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