Like the condenser, the evaporator is very delicate and usually fails due to a leak in one of the lines or a puncture in the evaporator itself. Can You Put Bigger Tires on Your Vehicle? YourMechanic All rights reserved. If you are someone who likes to work on your car yourself and you know a little bit about cars, you must have come across leak sealants when buying accessories for your car.. There are cans of "stop leak" freon but their usefulness is questionable. I have a recent failure on my A/C. What a great experience. Your car’s A/C is a system that cools the air and regulates humidity inside the cabin. What if the leak coming from an AC unit isn’t water, but something else? You can’t see the dye leaking from the evaporator because it is in the (dark, dank) evaporator case. Bottom line, Bryant does what’s right and is honest about what the problem is. If the AC evaporator has a small leak, it can continue to cool air. The fifth and final warning sign is the air conditioning leak. This will produce a sweet aroma, which might get more intense when the AC is turned on. If you feel like your car A/C is blowing 80°F even though the temperature setting on the dash is at its lowest point, you might be losing refrigerant. The evaporator may leak due to damage to the body of the machine. An air conditioning system is designed to remove heat from the air. As refrigerant travels through your A/C system, it cycles through liquid and gas states, which effectively allow it to “suck” heat out of the evaporator in the cabin, push it out of the condenser under the hood, and then fan cooler air through the evaporator and into the vehicle. SUV vs CUV vs LT: How Your Vehicle Determines Your Tires, What Brake Fluid Does & Why It’s Important. It's a professional thing, to get it done right. Your car air conditioning AC evaporator is a heat exchanger that resembles the condenser but is much smaller. What I find particularly great is that both issues were very easy and inexpensive fixes. Look out for these symptoms that might clue you into a car air conditioning leak. All Rights Reserved. The compressor is intended to circulate refrigerant through the evaporator. Although not all cars have a dedicated alert light for air conditioning issues, yours might! Vacuum leaks can be found with a smoke machine, soap + water or with a flammable spray. It is difficult to detect leaks in the AC evaporator because it's located in the heater/AC case behind the vehicle’s dashboard The most common symptoms of a vacuum leak are rough/high idle, misfires and a check engine light. If you suspect an evaporator leak and you want to check for it with dye, check the AC drain tube located under the vehicle. A short cycling car A/C compressor can be caused by a number of factors, including but not limited to low refrigerant levels resulting from a leak! Thank you Matt, Jeep Patriot - AC is not working - Indianapolis, Indiana. The The condenser fan relay allows the cooling fan to pull air through the radiator and the condenser to cool the vehicle. Like most AC issues, the first indicator of a damaged AC evaporator is poor performance. The cooled refrigerant cools the evaporator, which in turn can cool the air in the cabin of your vehicle. One of the first symptoms of a potential problem with the evaporator temperature switch is no cold air from the AC system. It depends on maintaining a predetermined pressure to operate. Very honest.... Will I use him again? Very knowledgeable and friendly. 2. How do I spot a car A/C leak? The cool air is weak or no cold air is blowing at all. How do you test for an A/C system leak? Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical guides, Check cars for recalls, common issues & maintenance costs, Hand-picked, community-rated professionals, Our mechanics make house calls in over 2,000 cities, Explore nationwide job opportunities for automotive technicians, Trusted mechanics, rated by thousands of happy car owners, Fleet maintenance with certified mobile mechanics. 1. However, there are 4 other warning signs of a damaged AC evaporator: 1. You can usually avoid these types of problems by scheduling regular maintenance for your air conditioner. When the dye circulates through the system, it escapes through any leak sites, which are then identified using a specialized flashlight. Vehicle and A/C part manufacturers do not endorse the use of sealants. A problem for many vehicles when water sits in the evaporator case because the case’s drain is blocked. There are plenty of reasons this could be the case (See: “My Car’s AC Is Blowing Hot Air!” for a few possibilities), but a problem we see frequently is a leaking evaporator coil. Can I just charge it 3 times a year or so? I appreciate his knowledge and attention to detail with my car. Some drivers compare this sound to a loud switch turning on and off continuously. The problem is that a leaking system has absorbed a lot of moisture and spread into every component of the air conditioning. 4 Signs of a Failing AC Evaporator. 5. Hello, you could have two or three problems here. I book this repair this weekend and look forward to Matt repairing my car. Whew. You can also use dye to find these leaks, but it’s a little more difficult. This actuator moves... Get a fair & transparent quote instantly before booking. The AC temperature will vary. What Are Tire Wear Bars & What Do They Do? 2. Second time using Bryant and he was, in both instances, able to diagnose and locate the problem. Bryant was very candid about the problem and offered to show me how to fix the issue if I wanted to do it myself. Symptoms include weak air, strange odors, and fluctuating temperatures. How Often Should You Get a Tire Alignment? Thank you so much, Dodge Grand Caravan - AC is not working - Boynton Beach, Florida, Jeremy is a very nice guy, immediately gets to work and resolve the issues. Adding Weight to Truck Bed for Traction: Myth or Must-Do? However, leaks aren’t the only reasons why your car may be blowing hot air, so it’s best to get an A/C performance check to figure out the root cause of your A/C issues. 4 Symptoms of a Bad or Failing Air Conditioning Evaporator. I was able to add some Freon and the cooling system is most definitely getting colder. 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