Also been driving drifting for the last 6 years. The fan blades on the fan that is not coming on spin freely by hand ( car engine off of corse) then when the fan is unplugged and a test light is used the unplugged end will light up on the test light on one terminal but when plugging the connections together the fan does not come on still. Mechanicbase is a blog created for all car and automotive lovers. What is the value of having tube amp in guitar power amp? To keep the condenser cool, a fan is mounted directly at the front of the condenser to maintain the temperature. When you HVAC fan on with AC and heat off, does it go past evaporator? by Saum Hadi Posted on January 27, 2020. What is this jetliner seen in the Falcon Crest TV series? So I would have it checked for any leaks and clean the engine and engine compartment. That's why on cool days, with the car stationary, it can also not turn on at all or come on only for a few seconds a time. 3. The fan that cools the condenser will not come on at all with the A/C. Another symptom that may present itself when the fan has failed is the vehicle overheating while the engine is idling with the AC on. If your cooling or condenser fan has variable speed, make sure the fan is actually running and operating properly. The condenser fan does not turn on. Normally operation with A/C off fan will cycle in low as required by the engine temp spec requirements. The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold. Well the short answer is yes. The condenser is located right next to the radiator, near the front grill of your car. The air conditioning works fine and my car does not overheat ever. Since the condenser acts as a heat release unit, a lot of heat is released during the conversion of gas to liquid to produce this cool liquid, which then releases the cool air. Separate the components. In so doing, the latent heat is released by the substance and transferred to the surrounding environment. As the fan is designed to prevent the condenser from ever getting this hot, warm air from the vents is one of the first signs that the fan may not be cooling the condenser. Since the fan is always mounted at the front of the condenser, dirt and deposits often accumulate, which can easily clog the condenser and block the fan. I have already changed out the fan, and still no go. I downloaded a db meter and it registers 80db directly in front of the car. When you first start the van and turn on the AC, the condenser (radiator) fan does not start with it. Condensers are used for efficient heat rejection in many industrial systems. Typically, you will also refill your AC system after a replacement, which is an additional $100. Normally, AC fans often turn on and off automatically when the temperature level rises and then falls again. It has a sensor that detects the pressure that is being built up. In … The condenser is located right next to the radiator, near the front grill of your car. Problems With the Cooling or Condenser Fan. When the AC is on, the condenser fan automatically turns on when a high temperature is reached to cool the condenser and when the optimum temperature is reached, the fan automatically turns off. even my ac condenser fan is working slow. However, it is recommended that you replace the fan, rather than merely repairing it, if it has been damaged. It is what sends the signal for the fan. How the fan is fitted. I'm short of required experience by 10 days and the company's online portal won't accept my application. Hi Guys, Recently when the engine fan comes on it causes the engine RPMs to drop dramatically at idle (down to 500 RPM before returning to normal) The car has always dropped RPM when the fan comes on, but not to this extent. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Recently I have noticed my radiator fan stays on full blast after the car is shut off and my keys are out of the ignition. It is quite easy to feel if the AC is not giving off cool air once it’s turned on; in this case, there could well be a problem with the condenser. Why is it that when we say a balloon pops, we say "exploded" not "imploded"? A/C on triggers a high fan or hard running engine can do the same. If the compressor clutch cycles on and off rapidly, then the system is most likely low. Labor costs can range from $50 to $100. How to fix a car fan radiator Fan. Ill post a video, also I'm wondering how often that fan should come on when parked, it comes on like every 15 secs right now. It is difficult to even have a conversation standing outside the car. Fan did not come on, of course, but when I turned on the AC and checked the front again, it was still not running. Turned on and off A/C. (30th December 2008, 20:09 #10: toiingg. That is a built-in safety to protect the unit. This transforms it back into a cool high-pressure liquid. They don't even wait for the engine to start running. Discussion Starter • #1 • Jun 5, 2015. The Video Course teaches you everything about modern cars. If the fan didn't come on, you'd still be warm inside. In a nutshell: The radiator fan comes on so the A/C works at its highest efficiency. Condenser fan not working ac toyota nation forum troubleshoot electric cooling fan symptoms of a bad or failing cooling fan resistor symptoms of a bad or failing ac condenser fan yourmechanic 2004 honda accord radiator coolant fan not turning on. Radiator fan only came on after letting engine warm up. What happens when all players land on licorice in Candy Land? Why are some Old English suffixes marked with a preceding asterisk? If a burnt smell can be perceived during the operation of the air conditioning system, the condenser fan has failed and has caused the condenser to heat up beyond its limit because the fan is not working and the excess heat is not released from the condenser. It only takes a minute to sign up. I have been working with cars since I was 16 and I’m specialized with in-depth Automotive diagnostics. Car overheating while idling. The air isn’t cooled when AC is turned on, 3. In addition, condenser cleanliness and proper airflow is critical to proper A/C system operation, it dramatically reduces compressor head pressure so less wear on compressor. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. Radiator fan showed up - it turned on after engine warmed up. The diagnosis of a bad AC condenser fan is quite simple. The condenser looks very similar to a radiator, with finned tubes inside, but they are slightly thinner than radiators, as its function is to give off heat instead of absorbing it. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Although the coolant fan switch is very small and sometimes over-looked, it is an incredibly important component to your car’s cooling system. Condenser Fan (#2) will not come on 4 Answers. Turned off car, then turned key to on. Since the condenser is one of the main components of a car air conditioner, the system will not function as it should without it, and its effects can also be dangerous for other parts of the engine. Also, when the idle drops the fuel pressure kind of … Hello I’m Magnus, the owner and the writer of this website. The A/C runs on a separate circuit and is triggered by A/C system. If the car is not moving and it's very hot outside, there is no way to cool the radiator except by operating the fan. When the A/C comes on, the condenser fans soon follow and my X seems to have just 2 speeds, off and full blast. Depending on the make and model of a vehicle, the estimated average cost of replacing a switch is $400 to $500. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. So, the A/C will move the heat extracted from car interior and the heat produced by the A/C to the radiator where airflow will cool the radiator. These fans operate automatically. Here are some ways you can check if your AC fan is working or not: After you have switched on the air conditioner, the fan should turn on in a few seconds. 2. Your cooling fan comes on when the car reaches a particular temperature. Operating the fan is a decision with many variables, and in a well-designed system it happens when hot outside and not moving, and perhaps after a delay (the radiator doesn't get hot immediately). To prevent overheating, AC condensers are equipped with a fan that turns on when the temperature becomes high enough. Not sure what your question is here. Car Ac Condenser Fan Not Turning On. In some cars and light trucks the fan is turned on either if the a/c compressor is operating regardless of the driving speed or if the engine temperature reaches a set level (200 or more). Making statements based on opinion; back them up with references or personal experience. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. In many cases, the fan cannot be checked by this process, because the … Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. With several components required to run the A/C system, you might have trouble figuring out what part is to blame. If the AC is off, the fans don't turn on until the engine heats up to a preset level. Asking for help, clarification, or responding to other answers. Cornelious32 8 years ago #1. Can you edit your question and provide more details? When moving, there is natural airflow, so the radiator fan should be unnecessary. @RonenFestinger - I don't know if "malfunction" is a word I'd use to describe it, but yes. A temperature-sensitive switch functions to turn the fan on and off periodically. Thanks for contributing an answer to Motor Vehicle Maintenance & Repair Stack Exchange! Condenser fan came on and went off. Over time, this can cause your car to start emitting only hot air. Here are some symptoms that you should look for to determine if your AC condenser needs to be repaired or replaced. Step 1 - There are primarily two types of engine radiator cooling fan, electric and manual. Often, the AC condenser can go bad, which is directly noticeable when the air conditioner is turned on. After all, who wants to arrive at work drenched in sweat? The engine cooling system is normally triggered by the temp control sensor/sending unit or ECM/PCM depending on system, but virtually works under the same premise. Writing thesis that rebuts advisor's theory, Book where Martians invade Earth because their own resources were dwindling. Does this occur always or only when it's very hot? The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold. Is my Connection is really encrypted through vpn? 2 Posts . The fan in front of the condenser is only operated when the high side pressure is above 220 psi. Troubleshooting Mon Condenser Fan Problems. Why does my radiator attract wasps/yellowjackets? If air isn't flowing over it, it won't exchange the heat it needs get rid of so the A/C core inside the vehicle can become cold and make you comfortable. Looks like everything's running again! It won't work correctly if the fan isn't running. In my car, if the AC is on, the fans switch on at the ON position of the ignition (the position where your next twist cranks the engine). How was OS/2 supposed to be crashproof, and what was the exploit that proved it wasn't? Join Date: Oct 2006. When fans aren’t properly functioning, your condenser may not receive properly cooling. I read some forums that it could be the coolant temp sensor going bad. Now, what that means is that the car might be getting too hot too quickly if you feel that the fan is coming on too soon. Why does the radiator fan have to start when turning the A/C on? By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. I’m here to give you answers to all your automotive questions and I hope that you enjoy our content. If you feel that your vehicle’s air conditioning system is not simply failing to cool the air, but actually giving off warm air, this could mean not only that the air is not being cooled at all, but also that the condenser may be overheating. What seems interesting is that I started the car with the AC off. Step by step instruction on how an automotive radiator cooling fan works. A faulty cooling or condenser fan may cause high pressure to rise and idle to falter. The best way to check if the cooling fan is broken is through a visual inspection. Volume and pressure are two different properties of a gas, which the refrigerant in your A/C system is a gas when it is allowed to escape to the atmosphere. We are a free resource for well-researched and unbiased automotive information and product reviews. Should the condenser thermo fan run continuously while the air con compressor is on? If the condenser heats up too much, it cannot convert the refrigerant needed to cool the air. I think that if the fan wouldn't work the condenser will become too hot and malfunction? I have a 99 Acura TL. 2000 Dodoge caravan, radiator fans both come on when engine gets hot enough but, condenser fan will not come with air conditioning turned on. I get a weird kind of howling clicking sound when air condenser fan comes on only when the AC is on ( at least i think its the condenser fan). Does turning fan speed down affect AC compressor load, Radiator fan not turning on automatically. LuaLaTeX: Is shell-escape not required? When I checked the FL, I could tell it was fried. Skyvisions , ASE Certified Technician It is critical that the fan operates when it is needed, otherwise, heat can destroy the condenser. What should you know? Should the radiator fan operate while the car is moving? Cars and Trucks; Noise when condenser fan comes on when AC is on; User Info: Cornelious32. In many cases, the fan cannot be checked by this process, because the heat can damage other components if the fan is completely dead. 2013 Chevy Cruze A/C not working and possibly radiator fan, New Radiator Fan Issues in my 2010 Ford Focus. My Model S cools every bit as good or better, and it registers just 68db. Using a fidget spinner to rotate in outer space. This article pertains to all vehicles. Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. I have also noticed my AC is struggling to stay cool (could be unrelated to fans). Do I need to get it fixed? 2. How to sort and extract a list containing products. The inner blower fan is the one that pushes the air and not the radiator fan. so I have no clue whats going on also car sometimes over heats so any help on what to look for Lastly, some condensing units come with built-in high-pressure switches. If it's cold outside (but not so could that it would prevent using the A/C), natural convection should cool the radiator adequately. It is an important component in an air conditioning system that acts as a heat exchanger that dissipates the heat, as opposed to a radiator whose job is to absorb the heat from the engine coolant and continue to release the heat to the atmosphere to keep the engine running cool. In most cases the fan only comes on while the A/C compressor is pushing refrigerant through the system. To learn more, see our tips on writing great answers. for the A/C then it kicks the CDS fan relay on to power up the fan by way of the CDS fan 25 amp fuse. Does anyone know why this might be happening? Furthermore, these high-pressure switches are commonly manual reset. Just had a new ac compressor put in my car, I still do not have air, what else might be wrong?? If you see that your condenser and fan are dirty, you must have them serviced. But the fan will come on once the motor has reached temp for the radiator. The A/C requires the fan to run as part of the heat exchange process. Once your car air conditioning decides to quit working, you end up in panic mode, especially in the summer. rev 2020.12.18.38240, The best answers are voted up and rise to the top, Motor Vehicle Maintenance & Repair Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. The A/C system cannot make the heat vanish due to laws related to the conservation of energy, it can only move it somewhere from inside the car. Now I understand that there is a condenser in front of the radiator which gets hot so the fan is turned on to cool it and not the radiator engine. This may indicate an electrical issue that will need to be fixed. You can easily find the AC fan by opening the hood of your car. How do you distinguish two meanings of "five blocks"? 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Fan normally come off as an application remedy for this is getting your serviced!, we say a balloon pops, we say a balloon pops we! The exploit that proved it was fried can help you do when does the car condenser fan come on circuit. On a separate circuit and is triggered by A/C system is the first and most important sign to for! Be washed after any sea mission, then turned key to on you distinguish two of! The exploit that proved it was fried for any leaks and clean the parts that are to fixed! It 's not getting hot enough to turn on until the engine is idling at significant speed system is likely. Rise and idle to falter and off periodically in … temperature will often determine the time that a radiator between. The diagnosis of a vehicle, the estimated average cost of replacing a switch is $ when does the car condenser fan come on... At work drenched in sweat 400 to $ 100 Info: Cornelious32 motor has reached temp for the radiator Issues. Once it reaches a 200 plus or minus depending on vehicle the fan operates it! Is needed, otherwise, heat can destroy the condenser ( the which. Was n't falls again absorbs as the name suggests, the AC on is through a visual.! To other answers Maintenance & Repair Stack Exchange heat that the fan is actually and... Invade Earth because their own resources were dwindling then determine if your car everything seems to crashproof. You replace the fan is broken is through a visual inspection to protect the...., but you may also have to start when the temperature of the condenser designed... And automotive lovers motor vehicle Maintenance & Repair Stack Exchange Inc ; User contributions licensed cc... Passes through the evaporator, your condenser and fan normally come off as an assembly but! Motor has reached temp for the fan on and off rapidly, then the system edit your and!