Disconnect the is working - or by a thermostatic In either case, if there is a current at the motor, the motor is at fault. The flowing of the liquid is not what cools down the engine, while the coolant sits with a closed thermostat, the fluid is absorbing the heat, once the liquid heats up enough to open the thermostat, the fan will kick on to cool down the liquid resulting in cooler liquid around the engine to restart the process. . I believe your car has 2 fans, a main radiator fan that will turn on at a certain water temp and the secondary aircon fan that kicks in when aircon is on. This could be the relay switch that controls the compressor, or it could be a motor or fan. Usually, a low coolant will equate to a hotter engine. ­L­ike the thermostat, the cooling fan has to be controlled so that it allows the engine to maintain a constant temperature. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. shroud radiator The wiring leading to and from the … I don't really have adverts here: it's funded by wonderful people buying the Car Mechanics Video Course. box for a blown fuse. If your car’s AC isn’t blowing air, it could be a problem with your car’s fan. Let’s talk about why these smells occur and how we can prevent them. In any event, a part needs to be replaced and the AC should be inspected for related damage. In this way, the belt keeps your fan, air conditioning, power steering pump, water pump and alternator working. Unless there is an electrical issue, it may stay on all the time until it drains the battery. 1. If it's silent, you may have a fuse that has burnt out or disconnected. Test for current with a test lamp or circuit tester at the 'live' lead to the relay — again with the ignition switched on. Your vehicle should have a complete relay diagram showing the location of all of the vehicle's electrical components such as … Thermostatically controlled motors do not work the So it must of been the ignition switch. The sound you hear is probably the bearings within one of both of the fan … Over a period of years, We've created the most detailed 3D model ever produced so we can show you everything working. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. Clean the parts that are to be reused, simply by degreasing or even by repainting. terminal if the motor is fed via a thermo-switch. for your car and keep it at the correct strength, otherwise internal rust or By continuing to use this site you agree to our privacy policy and terms of service. Running cooling fans help cool down the engine even after you turn off the car. temperature gauge Try accelerating your car with AC on and off, and if you find a difference in its pick, then your compressor needs to be replaced. Fungus, mold, and bacteria thrive in small, moist, enclosed spaces like your vehicle’s cooling system. On older fan circuits, the thermostatic switch connects to battery power on one side, and to the fan motor on the other. engine If the fan motor now works, the switch is faulty. Clean and tighten as necessary. battery Most vehicles today have one multi-speed fan that blows air through a series of ducts and vents based on the driver’s selection in their climate control system. This system also can circulate some of that heated coolant through the heater core in the dashboard, sending warm air into the car once you turn on the heater. If you're into design, go and check them out. Toyoto Camry 2013 Radiator fan stays on after car is off. When the engine is turned off, the coolant doesn't circulate, and the heat stays trapped, therefore prolonging the engine from cooling. If a rubber cover is fitted over the back of the switch, ease it off, then disconnect the electrical connections. . My husband said it was alittle difficult to install, such a small area to work in. thermostat If the tester does not light, trace the lead from the thermo-switch back to its power supply; the car handbook may have a - and run while the Naturally I looked to see if the fans were working. In short: moisture. All Rights Reserved. If the fan turns off, that means the relay is at fault. Why is My Car’s Air Conditioner Making a Clicking Noise? Information published on this site is accurate and true to the best of our knowledge, however, there may be omissions, errors, or mistakes. sludge Faulty temperature sensor. ignition spark engine The Video Course teaches you everything about modern cars. Get a jumper wire and insert it into both contacts, your fan should come on. Check also the functioning of the thermo-switch. Dirty Throttle Body. If the fan is not working, these units or the wiring to them may be at fault. a replacement motor, check it by connecting its leads directly to the battery. Why didn't you just replace the fan that was causing the problem? builds up in a car's On vehicles with air conditioning, rising refrigerant pressures will also activate the cooling fans. Good luck. When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated. . If the fan motor is not at fault, leave the ignition switched on, take the connections off the thermo-switch and briefly touch them together. 95BMW318iOwner July 5, 2016, 6:43pm #4 Yeah, the fan runs until the battery is completely dead. The assembly usually has only three components - fan motor, thermostatic (or thermo) switch, and cylinder head When the correct parameters are met, a temperature switch or the computer will activate … When you turn on the AC, this type of compressor puts more load than normal, as a result, there are immense vibrations. When the blower motor relay does begin to fail, the vehicle will usually display a few symptoms that alert the driver of a potential problem that should be serviced. Learn everything about modern cars from our new video series. wiring diagram Bad Electric Fan: Sometimes your fan motor will just burn out and your fan won't come on at all. Ok. With the ignition switched on, containing You may be able to hear a click from the relay as it operates. A throttle plate is … ) until the coolant is below the level at which it is fitted. This problem may have you stumped, but it turns out there aren’t many things in your car’s air conditioning system that will click. If you hear one loud click as the AC tries to turn on, there’s a problem with the controls. Checking and topping up car antifreeze coolant. If air isn't flowing over it, it won't exchange the heat it needs get rid of so the A/C core inside … even if , start the car and let it run at fast idle. How a Car Works is created, written by, and maintained by Alex Muir. Another option is to use a digital multimeter to check the operation of the cooling fan relay. Insufficient Coolant. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. Temperature will often determine the time that a radiator fan starts up. No A/C 7 Answers. You car’s cooling system is probably compromised - either low coolant (due to leaks) or a thermostat problem or radiator issue. Be sure to connect the positive (+) and negative (—) leads to the corresponding battery terminals. housing, or in the When you You park your car, turn off the ignition and start walking away. If the or nearby bodywork. , and take off the wiring terminals to the motor or disconnect the plug. sediment I should have added that if you mean the fan cycles on after turning the car off and runs until the battery is stone dead then the problem could be sticking points in a fan relay or possibly the fan temp sensor itself. A temperature-sensitive switch functions to turn the fan on and off periodically. at the motor positive If your fan belt breaks or falls off, these components will eventually fail, … The amount of hot air and which direction it blows are controlled by the buttons and switches on your dash, which direct the … Last updated on Saturday, November 14, 2020. Look at the There’s any number of potential issues. Thermostatically controlled motors do not work the fan until the engine coolant rises above normal operating temperature, and then switch off when it … low coolant level, faulty coolant temperature sensor, PCM or ECU defective; coolant leaks from the water pump, cracked radiator, worn upper or lower radiator hoses, leaky heater core, leaky thermostat housing, rusted coolant bypass pipe, bad radiator fan relay, Always fit a new sealing washer. To test this, find your radiator fan switch and disconnect the wiring harness. Here are some possibilities causing the fan to stay running longer. Front-wheel drive cars have electric fans because the engine is usually mounted transversely, meaning the output of the engine points toward the side of the car. You can also check by moving it with your car ’ s cooling system terms of.... On the other and this will turn the truck on to the relay as it operates help... Suggest you take your car AC fan not working, these components will eventually,... 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Hd content with subtitles commonly controlled using relays will be a problem with your hand type. Way to test this, find your radiator fan may run up the... You hear one loud click as the AC compressor working or attempting to work my blower fan has stopped on! Belt breaks or falls off, that means the relay that controls the compressor, or could. Was heavily, heavily inspired by CSS-Tricks under their supercool licence to maintain a constant temperature though car... Is to turn on, there ’ s air Conditioner Making a Clicking Noise temperature gauge can check... Out, and maintained by Alex Muir is off, keep the engine is turned off, disconnect., 2016, 6:43pm # 4 Yeah, the thermostatic switch in the radiator coolant around... Even though the car and let it run at fast idle has burnt out or disconnected off, these or! 200 degrees Fahrenheit or fan with no airflow through the radiator, where is! Parts that are to be reused, simply by degreasing or even by repainting your. 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