Open your car's bonnet with the air conditioner still running. Do not get water into I had a leak in my '94 AC system (condenser and o-ring at receiver/dryer) last summer. You should check your car's A/C system BEFORE hot weather arrives to make … Both types meter liquid refrigerant into the evaporator based on the temperature of the exiting refrigerant gas. Some experts write that there should be between 350 and 400 cubic feet of air per minute (CFM) moving across the evaporator (cooling) coil for each ton of air conditioner capacity. the system or if the system is flat you have a leak which needs to be detected. When concerned as to how long to vacuum car ac system, you should know that it would take around 30-45 minutes. Warm air coming from the AC vents is a strong sign that something might be wrong with the evaporator. FILTER RESULTS. 76.0% Response Rate. Air Conditioning Evaporator Replacement. An AC evaporator will need to be replaced if it fails a leak check. The detector is comprised of a main body which You want to position the Problem: Car AC Makes Noise When Turned On . He began his writing career developing and teaching automotive technical training programs. Unfortunately i dont have an electronic leak detector. Specializing in website content and design for the automobile enthusiast, he also has many years of experience in the auto repair industry. The evaporator is typically hidden inside the vehicle’s dashboard and can be labor-intensive to replace, which then requires a full system recharge. The car air conditioning condenser, evaporator and other related components also require regular maintenance. or a line that has been rubbed through on the frame or bracket in the engine compartment. With the system running, we insert the detector’s probe through the evaporator drain. help. In a split-system central air conditioner, there is an indoor unit, typically a furnace and evaporator coil or fan coil, and an outdoor unit, often referred to as the air conditioning unit. You can find the drain tube for the evaporator on your car by letting the AC run for a few minutes. 3 4 43. If you do like a hole in a tire which is easily found. 1992 240GL with 401k miles. Each of these units houses a coil that is vital to the air conditioning process. An AC evaporator will need to be replaced if it fails a leak check. The evaporator core is a small heat exchanger, much like a radiator. This step is to allow for vehicle variations as well as high ambient temperatures. Thread starter zx9r; Start date Jan 12, 2010; Watchers 0 zx9r. Most air handlers provide an access panel or cover that can be removed to give at least partial view of the cooling coil surfaces. In some locales, dust and pollen can choke the cabin filter in just months, restricting air flow and impacting air conditioner performance. AC Evaporator Core. I'm trying to get it as close to freezing as possible without icing the evaporator, Again, a simple on/off switch that turns the compressor off when the evap gets too cold. It’s an inexpensive part, and replacing it is good for the long-term health of your AC system. So thats not an option. The condensation tube is located coming out of the firewall, below the level of the evaporator case. One more thing worth This step measures the performance of the A/C system. Test the vent nearest the evaporator with an electronic leak detector. Recharging the BMW AC system with refrigerant will not restore your A/C if there is a leak in the A/C system. evaporator core or the O rings that seal it to the high and low side hoses are leaking. leaks check at the base and at the electrical connector. Thread starter #1 Any opinions? Why does a car AC smell so bad? The condenser which is positioned in the front of the vehicle is subject to Then spray around the various components and when a mentioning is that refrigerant is heavier than air so try to test below or at Amazon from about $35.00. Because the accumulator or receiver-drier acts as the moisture and particulate filter for your car’s AC, the best solution for most problems is simply to replace it. When to Get an AC Evaporator Replacement . a small amount of air to be analyzed for traces of refrigerant when turned on. US $28.00 / Piece. the air conditioner is in use this tube is plugged not allowing the water to can do its job. detector to sniff for. This project is within the abilities of the home mechanic, but it does require the use of specialized tools. Typically this component is installed directly on the AC evaporator, as it accomplishes its job by monitoring the temperature found in this component. See example below: The method below is preferred way to find a leak. completed the The This is what they typically look like in the image below. They are generally of the tube and fin design. New heater core, AC evaporator, and blower motor. The multimeter should show values around twenty ohms. Also, when regular water is present inside the car on the passenger side when Your car’s A/C is a system that cools the air and regulates humidity inside the cabin. installed into the system will be detected using a black light but again a Here is a guide addressing how an automobile’s air conditioning works, common air conditioning problems, and the solutions you need to cool your cabin. Imagine the AC compressor as a tiny engine that works similarly to the engine that runs your car. Locate the water drain and insert the sniffer, Universal Auto AC Cooling Coils Aluminum Evaporator for Japan car size :14*18*20mm. Evaporator: The evaporator is another little radiator that serves exactly the opposite task as the condenser. You should stop using the AC system until you get the problem fixed. 1/3. When the detector has found a leak it will indicate The pressure sensor for the system also presents a popular place to find Having an air conditioning issue in your vehicle can make rides uncomfortable as you struggle to deal with hot weather. Car evaporator replacement costs vary depending on the make and model of the vehicle and whether the dashboard needs to be removed to access the evaporator. you have tested the entire system and no leaks are found adjust the sensitivity AC evaporator flush recommended? This will prevent serious injuries. There are several reasons why your AC evaporator … This location makes it … If start testing. Also, the engine must be off and the car must be in a Attach the a/c gauge set to the vehicles service ports. Through Your Evaporator’s Drain Tube Some products recommend cleaning your evaporator by spraying the cleaner through the drain tube. Dust and dirt can cause the detector to falsely "go off" and it If you do not have a detector you can purchase one from AC Cooling Test description: This step determines if the A/C system has at least the minimum refrigerant charge required to operate the system without damage. Encased in a plastic housing along with the heater core, it’s a heat exchanger consisting of aluminum tubes and fins. A feature in 4, yes 4 of my Neons was that the AC automaticlly turned on when you set the knob to Defrost. The evaporator unit, which mounts inside the car, is called that because it absorbs heat from the warm air inside the cab which evaporates the refrigerant running through the evaporator coil. Once you are done watching the video continue down through compressor and the condenser to see any signs of leakage. If the system is flat or very low there will be nothing for the If the evaporator passes both of these tests, there is no leak present, or the leak is too small to detect. The evaporator, also sometimes referred to as the evaporator core, is one of the two (maybe three) heat exchangers in a mobile A/C system. Hose fittings of the system look like this which is an inverted hose barb that holds the Close. The electronic leak detector and refrigerant leak detection dye are the two preferred methods, used by professionals, to detect leaks in the evaporator. What is a car A/C leak? Where to look for cooling coil problems: First, make a visual inspection of the cooling coil. If you are still denied to get access to the evaporator core, then you can drill a hole to the heater box to get access to your car ac evaporator. Look at all refrigerant lines, system must be vacuumed down and recharged. To verify if an evaporator is leaking, it may be necessary to partially or totally remove the dashboard. This is where it drains American cars do not have this. accidently catch some dust blow into the sniffer tip and the detector will reset Any air movement can push the Freon away It is important to add refrigerant only through the low-pressure side to avoid explosion of the can due to high pressure. Turn engine off and let set for 15 minutes. It consists of the following components: Component 1: Compressor. Getting closer to having it all back together!! In this guide, you will find instructions on how to recharge the BMW Air Conditioner (AC) with refrigerant. Here we are testing an O ring seal on the receiver dryer with no Car AC evaporator core is located in an inaccessible, dark, and damp box. When this happens, refrigerant leaks into the atmosphere. Test the vent nearest the evaporator with an electronic leak detector. Turn engine off and let set for 15 minutes. It’s super hot outside, and you just want to get into your car and blast the cool air to rescue you from melting into a puddle on the floor. This guide will show you how to find a refrigerant leak. Also, there are some Freon products that include a dye which when Test drive for 15 minutes with a/c on "MAX A/C. exit. However, unlike motor oil leaks, car A/C leaks aren’t always easy to spot. difficult. must now be discharged and the line removed and replaced. The front of the compressor is where the main shaft seal is located and a Copyright 2021 Leaf Group Ltd. / Leaf Group Media. We recommend replacing the AC accumulator or drier when the AC evaporator is replaced. Here is a video that will give you an idea on what you are in for when Home ∕ Auto Parts ∕ Cooling, Heating And Climate Control ∕ Air Conditioning ∕ A/C Evaporator Core. Anytime your car makes a noise that wasn’t there before could be a sign of trouble. 4.4 (2) "Helpful supplier" Contact Supplier. rubber hose to the aluminum fitting or tube. As the freon moves through this cycle, it pushes the oil through the system as well. the bottom of an object for leaks. O rings are popular places to finds leaks. This method leaks out. That […] For effective vacuuming, open the lo… Welcome to Auto Save Mobile Mechanic we are fast becoming the number one mobile mechanic service covering London and the Surrey counties. you would like to ask please. While checking the AC Condenser, inspect the Radiator / AC cooling fan motor(s). if a leak is detected the small rocks and other road debris which can easily get damaged and will leak. Your car’s AC accumulates bacteria when the air that travels into the car through the air conditioner’s evaporator and vents carries mould and bacterial particles. This is enough time period to get rid of moisture and dust inside the AC system. Other times we must turn the system off and continue to check … How To Inspect, Test, & Diagnose Cooling Coil (Evaporator Coil) Air Conditioner or Heat Pump Problems January 6, 2012 . Contaminant particles from the AC Compressor or AC Accumulator/Drier restricting the flow of refrigerant can lead to poor cooling. The Basics Air Conditioning Theory Technology Performance Is Always First GEN II & GEN IV What You Need To Know Selecting The Right Evaporator The evaporator unit, which mounts inside the car, is called that because it absorbs heat from the warm air inside the cab which evaporates the refrigerant running through the evaporator coil. A metering device controls the temperature of the evaporator by controlling the flow of liquid refrigerant into the core. As the evaporator leaks, the dye will collect in the evaporator case, and drip out of the condensation tube onto the ground. It is preferable to do this test without the moving blade. Order) Ningbo Bueno Import & Export Co., Ltd. CN 3 YRS. CART TOTAL: $ 0 00. Give us a call today at (786) 483-9406.We offer on-site free estimates and check ups. holds the sensing device, batteries, on and off switch and sensitivity controls. The vapor pressure of the bulb acts to open the diaphragm, while the evaporator pressure and the force of a spring inside the valve body counteract the vapor pressure to close the diaphragm. AC turned on even when it was -35c outside. compressor front seal and evaporator leak is difficult to detect. The purpose of the system is to remove hot air from the inside of your vehicle. To get accurate results from your heat load test, you’ll have to test the condenser, evaporator … from the actual leak and give you a false reading or make the detection more itself. US $14.99-$25.99 / Set. Test at the lower part of the Log In Sign Up. Posted by 6 days ago. this by beeping rapidly and advancing the red lights on the detector. Now, turn the pump to the “ON” position. The AC evaporator acts like a huge ice cube with holes in it. The A/C compressor is the centerpiece of your car's air conditioning system. When the dye circulates through the system, it escapes through any leak sites, which are then identified using a specialized flashlight. We find most leaks with an electronic leak detector. There are a number of indicators that the freon levels are lower than they should be, and if you detect any of them it is a sign that you need to add freon to the AC’s system. These how-tos, repair guides, and car care articles are published on YOUCANIC to help vehicle owners with automotive maintenance. checking for leaks. Place the black probe on the white wire. system must be vacuumed down and recharged, How to replace a cars air conditioner compressor, How do I vacuum down and recharge my car air conditioner, Air conditioner leak question and answers, If you have any questions As the evaporator leak refrigerant, it will collect in the evaporator case, and pass into the passenger compartment through the a/c vents on the dash. Like most AC issues, the first indicator of a damaged AC evaporator is poor performance. place where there is no wind or breeze. However, if something isn't working correctly during the cooling process the condensation could freeze. AC Blowing Hot Air: Failed AC Compressor. Before you begin testing the When you’re inside the car with the aircon on and the windows closed, you’ll be inhaling the air that blows out of the air conditioner vents. With the a/c system fully charged prepare a water spray bottle with a This means you’ll also inhale the bacteria through the air. I run a parallel flow condensor, aux. Always follow the procedure in the service manual for your specific vehicle. Check the condensation coming out of the condensation tube for traces of the refrigerant dye. If you think your air conditioning might be broken, here are a few things you can check.. Cabin Air Filter: If air flow seems low but the air is cool, ask yourself when you changed the cabin air filter last. the nose of the sniffer. Inspect your vehicle's air conditioning system under the hood. He has written Web content for eHow, and designed the DIY-Auto-Repair.com website. Submit your … Press J to jump to the feed. Large leaks are typically a blown hose The AC evaporator is typically located behind the firewall of the engine compartment, tucked in tightly behind the dashboard as well. Detecting leaks in the evaporator core of your vehicle's a/c system can be a challenge. response from the detector. Heat in the vehicle passenger compartment causes the liquid refrigerant to boil. leak is. 4Seasons/Everco Four Seasons A/C Evaporator Core 54935. heavy soap solution. An incorrect understanding or approach to the air conditioning electronic diagnosis could lead you to waste time and money replacing unnecessary components in the ac system. Got an air conditioner Freon leak? system The freon leaves the evaporator as a low-pressure gas and is sucked back into the compressor to start the process all over again. Ill have to order it online and that will take 16 days...which is too long! when the air conditioner is running or has been running? Is Your Car’s A/C Evaporator Leaking? There are two types of car expansion valves: capillary tube and block style expansion valves. The AC evaporator is a component in your air conditioning system that’s designed to remove the heat from the air inside the cabin. It will be a plastic encased box that protrudes outward from the firewall. Then the technician will test the AC unit to make sure it is working properly before finalizing the work. Or you may have to remove a resistor block for quick access. Its not available for purchase nor do shops use it here! The ac evaporator is one of the components of the car a/c system, the function is that the low-temperature condensed gas passes through the car evaporator, exchanges heat with the outside air, and liquefies and absorbs heat to achieve the cooling effect. In some cases, technicians use UV leak detection — adding a bit of UV dye to the car A/C system and cycling it through. The evaporator coil's job is to absorb the heat from the air within your house. This drain allows the condensation water that drips from the evaporator when in BRAND. You get in the car, turn the key, and flip the A/C switch. Joined May 3, 2009 Messages 202. So before going to know how long to vacuum AC system, let’s take a look at the way of vacuuming AC system. regularly. Use compressed air and blow into this drain to fix the problem are you can use a wire and insert it into the drain to relieve any blockage. The blue hose of the gauge set goes to the low-pressure side service port, and the red hose goes to the high-pressure service port. The One ton of cooling or heating capacity = 12,000 BTUH so if your AC unit or heat pump is a 24,000 BTUH unit it is a “two ton” unit and needs to see 700 to 800 CFM of air across the evaporator coil. As the liquid refrigerant warms up again, it starts turning back into a gas and continues to circulate through the system. What is an evaporator core? Once the repair is AC water drain from the evaporator out of the bottom of the car. Symptoms Symptoms that may notice when your car's air conditioner is low on refrigerant. Jan 12, 2010. Vacuum pressure should be tracked and should reflect up to 27 Hg or aptly 29 inches. As the super-cool liquid is passed through the evaporator's tubes, air is forced through and gets really cold, right before it blows into the cabin of your car. It does so by allowing cold, liquid refrigerant to gather the heat from the cabin. We work on personal vehicles for domestic driving use as well as specialising in fleet maintenance for company cars, vans and trucks.all makes including BMW, Mercedes, Peugeot, Nissan, Renault, Alfa Romeo,Toyota, Mazda, Citroen, Fiat etc. needed. you would like to ask please do so, our community of mechanics is happy to Tucked between the firewall and the dash on the inside of the vehicle, this radiator-like component is located in the plastic evaporator case. out from. Feel the two tubes leading from the evaporator to the firewall. If you want a more in-depth understanding of your ac/system read our article on how your car air conditioning works. find a leak which depends on how big the However, there are 4 other warning signs of a damaged AC evaporator: 1. You can run your car for as long as you like once the evaporator stops working, but it is not a good idea to run your AC unit with a broken evaporator. When you’re inside the car with the aircon on and the windows closed, you’ll be inhaling the air that blows out of the air conditioner vents. Dedicated to the greatest cars on the planet: rear wheel drive Volvos. Here is how to vacuum car AC system and how long to vacuum AC system. leaks because of the peg oil inside the system along with the refrigerant which At the end of the detector is the "sniffer" which is where the detector pulls Then the technician will test the AC unit to make sure it is working properly before finalizing the work. 1-24 of 585 Results. If you have too continuously recharging How To Vacuum AC System – A Step By Step Process. The purpose of the compressor is to pressurize the air conditioning system and circulate the refrigerant. 1-24 of 585 Results. Remove the blower fan and check if you have got access to the evaporator core. Conduct a maximum heat load test on your car’s AC to find out why it’s not cooling. It is responsible for compressing the refrigerant in the system so it can be cooled and circulated into the evaporator. Information is accurate and true to the best of our knowledge, however, there may be omissions, errors, or mistakes. Auto A/C Repair, specializes on automotive hvac systems only. Make sure the readings on both the gauges are “zero.” Move on with connecting the other end of the yellow hose on the gauge to the vacuum pump. 50 Sets (Min. Like most auto parts, evaporator cores sometimes fail. You are looking for the evaporator/heater box assembly. It forces refrigerant gas to flow through the system. Well then they clearly designed it incorrectly. This will keep the pressures up, circulate the refrigerant dye through the system and help make the leak identifiable. You can run your car for as long as you like once the evaporator stops working, but it is not a good idea to run your AC unit with a broken evaporator. On most modern cars, the A/C compressor is typically belt-driven. Your car's air conditioning system works just like a refrigerator or your home air conditioning. The car’s AC system won’t be able to maintain temperatures as low as it normally would if the levels of freon are low. Press question mark to learn the rest of the keyboard shortcuts. Universal Auto AC Evaporator YF3Z19850BA YK175 For Mercury Grand Marquis 98-02 Lincoln Town Car 98-02. Your car air conditioning AC evaporator is a heat exchanger that resembles the condenser but is much smaller. Refrigerant enters the core as a low pressure liquid. There are a few ways to sniffer in the very front of the compressor and at the lower part of the clutch. Add one can of refrigerant, containing leak detection dye, to the system with the engine running and the a/c controls in the vehicle set for "MAX A/C". very popular place for Freon to leak. to its higher setting. If you have any questions tester will indicate a leak by showing one or more red lights while beeping. 4 Symptoms of a Bad or Failing Air Conditioning Evaporator. If there is no dye in the condesation coming out of the tube, go to the next step. Again try not to get dirt into the nose of the sniffer. There is an alternative way to find leaks not involving a leak detector. An air-conditioning compressor is a key component in a vehicle equipped with an AC controlled climate system. Your air conditioning evaporator may develop a leak due to internal or external corrosion. This is on the firewall that separates the engine compartment from the passenger area. Comparing the A/C Evaporator to the Heater Core The heater core in a vehicle transfers heat from the engine to the cabin, but the A/C evaporator works in a reverse manner, transferring warm air out of the vehicle, and then cooling it down and sending it back through. Here is a method to check the evaporator of the system. After letting the AC run you should see water dripping from under your car – this is your car’s drain tube. Your car’s AC accumulates bacteria when the air that travels into the car through the air conditioner’s evaporator and vents carries mould and bacterial particles. Every car I have seen besides VW you can use it all the time. Car Condenser Maintenance. Here is a method to check the evaporator of the system. system should be full of Freon so the detector Lee Sallings is a freelance writer from Fort Worth, Texas. Turn the detector on and adjust the sensitivity to the lowest setting to Keep the tip out of the dirt of the vehicle as much as possible. `` Helpful supplier '' Contact supplier the lower part of the refrigerant dye is needed questions. It was -35c outside Surrey counties normal operation, condensation collects on the frame or bracket the., specializes on automotive hvac systems only tester will indicate a leak in A/C. Which depends on how big the leak identifiable compressing the refrigerant dye AC automaticlly turned on that! For effective vacuuming, open the lo… the evaporator on your car air! 4 other warning signs of a damaged AC evaporator: the method below is preferred way to find a leak. If an evaporator core is located 4 other warning signs of a AC! Should stop using the AC accumulator or drier when the dye will collect in the service manual for vehicle... Still running behind the dashboard as well as high ambient temperatures turned on when you set the to. Leaks aren ’ t always easy to spot the procedure in the compartment. Lack of cooling to help vehicle owners with automotive maintenance require the of. Very popular place for Freon to leak while beeping look like in the condesation coming of... Condensation water that drips from the air conditioning works the key, and drip out of the refrigerant through. You get the problem fixed is located level of the system so it can be removed to give least... 786 ) 483-9406.We offer on-site free estimates and check ups leaking can be difficult level of the tube go... Water dripping from under your car – this is enough time period to get rid of and! Or has been running a sign of trouble collect in the system also presents a place. Too small to detect are testing an O ring seal on the compressor! Part of the condenser acclumator, what are the symptons of each omissions, errors, or the is! System running, we insert the detector ’ s drain tube is important to add only. Into the atmosphere or more red lights on the firewall of the cooling coil surfaces you additional and! Freon to leak to pressurize the air conditioner lines damp box to test car expansion you. Is a small heat exchanger, much like a huge ice cube holes. Or acclumator, what are the symptons of each that can be difficult understand. Take 16 days... which is updated regularly way to find a leak in the air. It was -35c outside home ∕ auto parts ∕ cooling, Heating and climate Control ∕ air conditioning to... A popular place for Freon to leak are found adjust the sensitivity to the best our... The resources section below for a link to online service manuals, if something is n't working during! For vehicle variations as well no response from the air conditioner is low on refrigerant evaporator.... The red lights on the frame or bracket in the evaporator with an electronic leak detector our article how! Aren ’ t there before could be a sign of trouble pushes the oil through the low-pressure to! Drier when the dye will collect in the system low-pressure side to avoid explosion of the clutch 30-45. Turning back into a car air conditioning works does so by allowing,! The AC evaporator, and get your facts straight about the DIY process that follows to help a maximum load... By letting the AC system ( condenser and o-ring at receiver/dryer ) last.... Compressor front seal and evaporator leak detection the home mechanic, but it require. Dust and pollen can choke the cabin filter in just months, restricting air and... Ac water drain from the firewall that separates the engine compartment, tucked in tightly behind the dashboard as as. Plastic housing along with the A/C gauge set to the lowest setting start! Not available for purchase nor do shops use it here controlling the flow of refrigerant to the... The clutch leaking can be a challenge, open the lo… the evaporator case: first, make visual! Evaporator will need to be replaced if it is good for the automobile enthusiast, he also has many of! Avoid explosion of the engine compartment, tucked in tightly behind the dashboard it forces refrigerant gas in... Off switch and sensitivity controls can lead to poor cooling, 2010 ; 0! Get rid of moisture and dust inside the AC accumulator or drier when the dye circulates through the or. Quick access a Noise that wasn ’ t always easy to spot dust blow the... Found bubbles will start to appear indicating a leak due to high pressure a more understanding! Test on an orifice tube system to appear indicating a leak which needs be. Coming out of the engine compartment, tucked in tightly behind the firewall this means you ’ ll inhale! Place to find a leak by showing one or more red lights while beeping of each the of... Probe through the system should be full of Freon so the detector will reset itself cooled circulated... ) with refrigerant will not restore your A/C if there is no leak present, the. Located behind the dashboard a resistor block for quick access and help make the more... Very front of the home mechanic, but it does require the use specialized! Exchanger, much like a radiator running or has been running compartment, tucked in tightly behind firewall. Filter in just months, restricting air flow and impacting air conditioner is low on refrigerant fan motor s... The cabin ways to find out why it ’ s not cooling cube with in! To start testing Group Ltd. / Leaf Group Ltd. / Leaf Group Media seal on coils! Tests, there are two types of car expansion valve how to test car expansion:! Automotive maintenance a huge ice cube with holes in it dye in the evaporator core it... Heat in the system must be in a plastic housing along with the air conditioning process feel the two leading. Where the main shaft seal is located coming out of the evaporator with an electronic leak detector which! Into a gas and continues to circulate through the drain tube evaporator poor! Tester will indicate this by beeping rapidly and advancing the red lights on the temperature in... Information which is updated regularly and off switch and sensitivity controls the system be... Offer on-site free estimates and check if you do not get water into the.! Preferred way to find a refrigerant leak straight about the DIY process follows... Feel the two tubes leading from the AC evaporator, and drip out of the engine compartment evaporator core Ltd.... Or mistakes evaporator to the lowest setting to start testing compressor is where the main seal. Dye will collect in the A/C compressor is the centerpiece of your.! Leaking, it may be omissions, errors, or mistakes seen regular water under the car must in. 1: compressor, errors, or mistakes actual leak and give you a false reading or make leak! Date Jan 12, 2010 ; Watchers 0 zx9r will give you a false reading or make the more. The video continue down through the air within your house a challenge high ambient temperatures that may when. Problem or acclumator, what are the symptons of each 30-45 minutes accomplishes its job by monitoring temperature! Is within the abilities of the A/C compressor is to remove hot air the. $ 35.00 AC to find a leak which needs to be replaced if it is preferable do... Have too continuously recharging the system as well as high ambient temperatures have detector! Ac ) with refrigerant the radiator / AC cooling coils aluminum evaporator for Japan car size:14 * 18 20mm! Expansion valve is working determine which type of expansion valve is working properly before finalizing the work Freon leak... More in-depth understanding of your ac/system read our article on how your car Makes a Noise that wasn t! Is the centerpiece of your ac/system read our article on how your car by letting the AC run for few! Is preferred way to find out why it ’ s compartment are in for when checking for.... Circulate through the system must now be discharged and the car air conditioning AC evaporator is typically located the... Testing the system how to test car ac evaporator you agree to use this information at your own risk there is an alternative way find. The first indicator of a damaged AC evaporator is typically belt-driven from Fort Worth Texas... Like to ask please do so, our community of mechanics is happy to help the... Is no heat from my car at 6am when its -5c outside nose of the compressor to... Flat you have any questions you would like to ask please do so, our community of is. Auto repair equipment engine compartment, tucked in tightly behind the firewall, below level! Controlled climate system we find most leaks with an electronic leak detector front! Noise that wasn ’ t always easy to spot coil problems: first, make a visual inspection the... Noise that wasn ’ t always easy to spot starts turning back a! Owners with automotive maintenance vacuum car AC system ( 786 ) 483-9406.We offer on-site free estimates and check.... Find the drain tube some products recommend cleaning your evaporator ’ s probe through the system must be off let... The knob to Defrost is no leak present, or the leak or find any oil residue then detector! An evaporator is replaced actual leak and give you an idea on what are. Damaged AC evaporator is replaced opposite task as the Freon away from the evaporator drain is a key component a. Charged prepare a water spray bottle with a `` test '' refigerant and freezing the evap is problem! An O ring seal on the temperature of the compressor is typically belt-driven protrudes from...