A temperature-sensitive switch functions to turn the fan on and off periodically. If the condenser heats up too much, it cannot convert the refrigerant needed to cool the air. If the fan didn't come on, you'd still be warm inside. Cars and Trucks; Noise when condenser fan comes on when AC is on; User Info: Cornelious32. It is easy to spot a bad condenser fan, but you must consult a good mechanic to have your AC fan repaired or replaced. The condenser is located right next to the radiator, near the front grill of your car. We are a free resource for well-researched and unbiased automotive information and product reviews. 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. Step by step instruction on how an automotive radiator cooling fan works. Furthermore, these high-pressure switches are commonly manual reset. fan is basically mounted on the face of the condenser, often time’s dirt and debris build-up which can easily clog the condenser and block the fan. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. How the fan is fitted. They don't usually turn on until it hits 210 to 230 farenheit depending on the car manufacturer and model. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Clean the parts that are to be reused, simply by degreasing or even by repainting. Separate the components. so I have no clue whats going on also car sometimes over heats so any help on what to look for (I guess that's more or less semantics, but hopefully you get the point.). Writing thesis that rebuts advisor's theory, Book where Martians invade Earth because their own resources were dwindling. You can easily find the AC fan by opening the hood of your car. The fan in front of the condenser is only operated when the high side pressure is above 220 psi. The trigger is the thermostat in the radiator of your vehicle. To keep the condenser cool, a fan is mounted directly at the front of the condenser to maintain the temperature. Fan did not come on, of course, but when I turned on the AC and checked the front again, it was still not running. April 30, 2016 - The air'conditioning condenser is a radiator positioned between the car's grille and the engine-cooling radiator. 2. I read some forums that it could be the coolant temp sensor going bad. 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. Troubleshooting Mon Condenser Fan Problems. 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. 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. 2. 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. BHPian . Hello I’m Magnus, the owner and the writer of this website. Labor costs can range from $50 to $100. When you first start the van and turn on the AC, the condenser (radiator) fan does not start with it. 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. by Saum Hadi Posted on January 27, 2020. These fans operate automatically. A fan failure should generate a CEL. Although the coolant fan switch is very small and sometimes over-looked, it is an incredibly important component to your car’s cooling system. Once your car air conditioning decides to quit working, you end up in panic mode, especially in the summer. Robotics & Space Missions; Why is the physical presence of people in spacecraft still necessary? They don't even wait for the engine to start running. How to install an electric motor-driven radiator cooling fan instead of the belt-driven one? 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. A simple test can help you do some quick circuit checks, if necessary. 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). Location: Calcutta. A condenser in a car air conditioner ensures that you get cool air from the vents of your air conditioner when you turn the AC on. even my ac condenser fan is working slow. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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). In so doing, the latent heat is released by the substance and transferred to the surrounding environment. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. Typically, you will also refill your AC system after a replacement, which is an additional $100. One problem that you may experience with your outside air conditioner is when the fan does not come on. 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. Step 1 - There are primarily two types of engine radiator cooling fan, electric and manual. Why does my radiator attract wasps/yellowjackets? 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. 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. How do you distinguish two meanings of "five blocks"? If your cooling or condenser fan has variable speed, make sure the fan is actually running and operating properly. If the AC is off, the fans don't turn on until the engine heats up to a preset level. 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. - … my ac clutch coil is frequently failing ,its the second time i changed it but still its failed Condenser Fan (#2) will not come on 4 Answers. It is difficult to even have a conversation standing outside the car. I’m here to give you answers to all your automotive questions and I hope that you enjoy our content. Does this occur always or only when it's very hot? 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). 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. Once it reaches a 200 plus or minus depending on vehicle the fan will kick on. This transforms it back into a cool high-pressure liquid. In systems involving heat transfer, a condenser is a device or unit used to condense a gaseous substance into a liquid state through cooling. What seems interesting is that I started the car with the AC off. If the compressor clutch cycles on and off rapidly, then the system is most likely low. It only takes a minute to sign up. 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. Others have 2 fans and one is strictly for A/C. Not sure what your question is here. 3. 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. A faulty cooling or condenser fan may cause high pressure to rise and idle to falter. Turned on and off A/C. If you see that your fan doesn’t turn on even when the engine temperature rises, it’s likely that your fan is defective, although it could also be burnt or faulty wiring that is preventing the fan from being powered. If it's cold outside (but not so could that it would prevent using the A/C), natural convection should cool the radiator adequately. Car Ac Condenser Fan Not Turning On. Discussion Starter • #1 • Jun 5, 2015. From there, as the refrigerant enters the condenser, it becomes highly-pressured vapors that cool as it flows through the condenser. With several components required to run the A/C system, you might have trouble figuring out what part is to blame. How was OS/2 supposed to be crashproof, and what was the exploit that proved it wasn't? LuaLaTeX: Is shell-escape not required? Does it really make lualatex more vulnerable as an application? Another symptom that may present itself when the fan has failed is the vehicle overheating while the engine is idling with the AC on. 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. the ac clutch is working fine and it has proper freon but the ac is blowing warm and the ac comp head pressure is high. The condenser is located right next to the radiator, near the front grill of your car. Welcome to the site and cheers! Normally, AC fans often turn on and off automatically when the temperature level rises and then falls again. Should the helicopter be washed after any sea mission? This may indicate an electrical issue that will need to be fixed. I have already changed out the fan, and still no go. If Section 230 is repealed, are aggregators merely forced into a role of distributors rather than indemnified publishers? If you see that your condenser and fan is dirty, you will need to get it serviced. Only when the car is stopped or also when travelling at significant speed? Does turning fan speed down affect AC compressor load, Radiator fan not turning on automatically. Should the radiator fan operate while the car is moving? In many cases, the fan cannot be checked by this process, because the heat can damage other components if the fan is completely dead. 2 Posts . Why are some Old English suffixes marked with a preceding asterisk? @RonenFestinger - I don't know if "malfunction" is a word I'd use to describe it, but yes. As the name suggests, the thermostatic clutch self-activates depending on temperature, while electric radiator fans and condenser fans are activated electrically. I think that if the fan wouldn't work the condenser will become too hot and malfunction? Is my Connection is really encrypted through vpn? Some have a pressure switch on the a/c line that will turn the fan on when the high pressure line reaches some point (180psi or more). These fans operate automatically. 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. Most modern cars have done away with the fan clutch and are equipped with a pair of electric fans, mounted forward or behind the radiator and condenser. Depending on the make and model of a vehicle, the estimated average cost of replacing a switch is $400 to $500. Asking for help, clarification, or responding to other answers. That is a built-in safety to protect the unit. Why is it that when we say a balloon pops, we say "exploded" not "imploded"? Temperature will often determine the time that a radiator fan starts up. Should the condenser thermo fan run continuously while the air con compressor is 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. In most cases the fan only comes on while the A/C compressor is pushing refrigerant through the system. I wiggled the wiring coming out of the condenser fan a bit, and the motor started to turn briefly before stopping. I downloaded a db meter and it registers 80db directly in front of the car. Making statements based on opinion; back them up with references or personal experience. I have a 99 Acura TL. When I checked the FL, I could tell it was fried. A manual fan is connected to the engine drive pulleys and is controlled by a thermo fan clutch which senses radiator heat and engages when the engine is running at higher temperatures. I have a 2009 Honda accord 2.4l I have 2 fans but only one comes on when a/c is on. I'm short of required experience by 10 days and the company's online portal won't accept my application. In a nutshell: The radiator fan comes on so the A/C works at its highest efficiency. But the fan will come on once the motor has reached temp for the radiator. However, it is recommended that you replace the fan, rather than merely repairing it, if it has been damaged. Does anyone know why this might be happening? In many cases, the fan cannot be checked by this process, because the … When fans aren’t properly functioning, your condenser may not receive properly cooling. A/C on triggers a high fan or hard running engine can do the same. Also, when the idle drops the fuel pressure kind of … Join Date: Oct 2006. So if it NEVER comes on when idling you definitely have a problem. the fans are supposed to come on when the temperature guage is at around half and they come on to prevent it from rising furthur, not lowering the temperature… The A/C runs on a separate circuit and is triggered by A/C system. Condenser fan came on and went off. Cornelious32 8 years ago #1. Mechanicbase is a blog created for all car and automotive lovers. 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. 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. Skyvisions , ASE Certified Technician After all, who wants to arrive at work drenched in sweat? 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. Just had a new ac compressor put in my car, I still do not have air, what else might be wrong?? 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. To all your automotive questions and I hope that you replace the on! 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