Equally frustrating is a fan that is working but the blades are rotating very slowly. The condensor fan should run whenever the HVAC is operating, except with the ECON mode on. @johnp5 . Think about it, you don't want your fan pulling air through the radiator when the engine is cold, and hardly moving when air needs to be cooling the radiator. It’s the fan motor that makes the radiator expensive. Thermostatically controlled motors do not work the fan until the engine coolant rises above normal operating temperature, and then switch off when it has cooled down again. It will tend to cycle when the truck is warm, especially if you turn the AC on or off. Fan should be free wheeling, if you can't rotate it, it might be seized. When the fan clutch goes bad it will usually stop engaging and your engine will over heat in hot weather. Radiator Fan Cost. A radiator fan is not very expensive and can cost around $200 – $400. Your Nissan Cube‘s radiator fan has one of the most important jobs on the vehicle.It is the last line of defense between you and an overheating engine. If you have a fan that’s dead or dying, the answer is to simply replace it. Visually check the fan if you don’t hear its noise. Question. It also depends strongly on the fan… The fan will usually store a fault in the dme for activation or ihka system faulted for excess pressure (because fan is not coming on). Depending on your temp they will either spin quicker or slower - but they should spin all the time. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. save hide report. The first sign of a fan clutch stuck in the permanently engaged position is a fan that never shuts off. 3. The great news is that generally speaking it’s easy to tell fan air direction if you know what to look for. If the sensor isn’t working, your fan won’t come on because it won’t know that the temperature is hot enough to require activation, which can frequently lead to overheating. There are two ways of accessing it: 1. Fan WILL stay on if your kill switch is off (WATCH YOUR FINGERS) 3. First off the easiest way to check and see if your cooling fans are working as they should pull your car out and turn the A/C on full blast. Let me take a moment to thank you for posting on the HP Support Forums. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. TEST 2: Bypassing The Radiator Fan Motor Switch . Courtesy of Darkday | September 26, 2009 | Print. You'll know by sound if your fan clutch is working, that's a massive fan, it moves a lot of air. The cooling fan relay is the relay that controls the engine’s cooling fans. Step 1 – As we know, there are two main types of radiator fan – electrical and mechanical. How to tell which way a fan blows – 3 basic methods. The driver's side fan in the radiator fan, the pass side fan is the A/C condenser fan. I read that the laptop is overheating and the casing is separating the top left corner. It helps your cooling system operate effectively and your engine operate efficiently. 2. 2. The fan is on but rotating very slowly. easiest way to tell if water pump is working is to run engine until at running temp. If the motor fails the blades will not be able to spin or generate air flow. Also, some of the causes of a broken radiator fan require immediate repair, since they can cause additional problems if left untreated. this can loose its thickening properties over time, or even leak out slowly. Remove the bumper. How Does A Radiator Fan Work? If a fan seems like its working, but the bearings inside it are on their way out, you could still be having issues with the rotational speed, and thus, not enough power to keep components cool or air moving through the system. It's actually made up of thin pipes or tubes surrounded by thin, cooling fins. The engine cooling fan only runs when needed to help cool the engine. If the radiator fan is not working, it’s a serious problem.. Just because the radiator fan is not on does not mean that it is not working. Radiator core: This is the main, large block component at the center of the radiator. share. So, A engine cooling fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. A slow-turning fan will generate weak airflow. The fan VC is filled with silicon fluid. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. 4. You’ll need to replace the fan. The oft-overlooked fan clutch doesn’t get a ton of credit or attention, but it’s an essential piece of the cooling equation in many vehicles. If your AC offers different fan settings, check if it is set at low speed. Inspect for any leakage around fan… CPU fan and any other fans *should* operate at all times. Generally there is a switch that expands and contracts with heat, thus making the necessary "contact" allowing fan to operate. SOURCE: Radiator fan not operating, radiator fan relay. 2. The white wire is called the run wire. Jeep WJ Grand Cherokee The Radiator Cooling Fan Relay Switch for a 2003 Jeep Cherokee is located behind the bumper on the passenger side underneath the headlight. When you think of an automotive cooling system, the first thing that likely comes to mind is your radiator…or maybe your cooling fan. Your radiator fan has stopped working, and although it’s not an end-all-be-all, it will be a lot more comfortable cruising in your car with a working fan. Since we know what a radiator fan is, the two types of radiator fan, and the history of the radiator fan, we need to now understand the step-by-step process of how a car radiator cooling fan works. Your fan is working fine. then carefully remove radiator cap. As a result, electric power to the fan motor doesn’t stop and the fan continues to run. 1. The temperature sensor determines when the radiator fan comes on by reading the cooling system temperature. The problem of the radiator fan not working will cause tremendous damage to the engine and thus must receive immediate attention when it arises. Because of how they work (and how most are designed) there are great clues to help. First, you will need to check which fan header the pump cable is connected to on the motherboard. The engine coolant sensor or a separate engine … It will also tend to sound like a hurricane under the hood when fully engaged and driving off slowly from a start. How to Test a Fan Motor With a Multimeter Test the first set of wires: Now is the time to test the white – brown and white wires. If in TEST 1 the radiator fan motor does activate (when applying power and Ground directly to it), then we'll test the radiator fan switch by using a jumper wire (on its connector) and bypassing it. There are several ways to tell if a bad cooling fan relay is to blame for an overheated engine. Check power and ground at the fan connector. So, do not worry if the fan doesn’t immediately start working. This will only be possible if the pump cable is connected directly to a fan header on the motherboard. How can I tell if my AIO radiator is working? In such a scenario, the condenser fan and radiator fan may or may not share the same relay. Wait for the engine to cool down to dead cold and start it up; most fans will turn some whenever the engine's running, but they shouldn't be running hard enough to hear from inside the car with the hood shut. the movement of the fluid within the clutch housing through small holes is controlled by a bi-metallic coil strip on the front of the fan, as this heats up - e.g. Not sure how to tell you to test it with out a scan tool to read what the computer is saying. The sensor is usually located in the car thermostat cover. The cooling fans don’t work. Take your multimeter and set it to ohms. It will tell you temp of your CPU and speed of the fan (assuming you have it connected directly to CPU1 fan connector on your motherboard). This is where the removal of heat takes place when air flows through the core as you drive, and with the help of the cooling fan. 'TItanic' star regrets working with Allen and Polanski. 100% Upvoted. Take the black multimeter standard test lead and touch the white wire with it. Even though the radiator fan might work fine in these cases, the coolant is often not able to get rid of its heat energy fast enough. The fan should have been on @ 100% during an overheat situation. The easiest method is to start the engine and then turn on the air conditioning. YouTubers accused of causing public health risk. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. Check both fan motors for open circuit through the motor windings, and evidence of the motors overheating and burning the winding wire shellac, will look and smell burned. The results of your tests will help you troubleshoot the reason your Honda Accord's radiator fan motor isn't working. Working as part of the engine cooling system alongside coolant, a radiator fan blows cool air through the radiator as a means of heat transfer to prevent the engine from overheating. NYC to allow indoor dining in restaurants I understand that you have an HP Pavilion g6 series laptop. You will not be able to obtain a pump RPM reading if the pump cable is connected to the power supply via 4 pin Molex to 3 pin fan adapter. First make sure your thermostat is working, that is a much more common problem than a radiator being blocked. Although this info applies to any 1998-2001 4 cylinder Honda Accord, the basic testing procedure (in each test step) can by applied to any Honda. How To: Diagnose a Non-working Cooling Fan. The fan has a final stage resistor built in so it gets a pwm signal for activation and speed. ... How to Tell if Cooling Fan Relay is Bad. The ECU signals the radiator fan to work at the precise time. 10 comments. with someone slightly reving engine, look into radiator. Cause tremendous damage to the engine of a fan clutch stuck in the radiator will not able! Likely comes to mind is your radiator…or maybe your cooling system temperature –. 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