CAUTION: If the fan fuse or fusible link is blown, or the breaker has been triggered, it is possible the fan motor itself may be bad and causing the fuses to blow. He came, he vacuum, fill the system and lucky me the A/C work for one and half years. Check the belt that runs the pump. There could be another faulty relay or a problem in the wiring harness or connector. You can find the diagram in the repair manual for your vehicle. The AC has a feed line to command, depending on configuration, the fan on (condenser or cooling fan). 1. I recently purchased a new Universal 120w cooling fan for my BMW 318iS. Answer: Unplug the cooling temperature sensor. A coolant fan switch is a small and very simple switch comprised of typically two wires. Check the harness closely, look for signs of damage to the wires or the connector. Answer: There could be a problem with the cooling fan control module. Answer: Check the engine coolant sensor and the relay for the low-speed circuit. However, when A/C using then cooling Fan start and running continuously after the A/C is closed? Recently it rose to the L in normal and I had flushed the system, changed both temperature sensors and the control module over the center of the radiator, the radiator fan and the circuit breaker to the fan. Look for loos or corroded wires-connectors. The radiator fan on the inverter side (driver, side, left hand drive) only works on low speed. But you need to have the diagram for the circuit and follow the voltage to see where is or isn't going. Learn how to interpret CB talk here. Missing equipment can greatly reduce a radiator fan efficiency. The fans don’t come on when the engine is at full temperature either. Here are instructions for how to manually lift up a stuck power window on a car. the wires. Whenever something electrical doesn’t work, the first thing to check is the fuse. If necessary, check the wiring diagram for your particular model and check the circuit. Replace the fuse or fusible link, or reset the breaker, and test the fan motor again. A Toyota's cooling fan is powered by an electric motor. Question: If the A/C compressor of a Mercedes-Benz C300 is not good, can it affect the fan? Check the relays, temp switch. In the absence of a fan, air still flows in, usually directed by the shroud. Electric radiator fan runs slow. Question: Why does my 2012 Silverado volt gauge drop from 14+v to about 12v when the electric fan is running? Make sure that engine temperature reaches about 220°F (104°C) and the radiator tank temperature rises accordingly (meaning hot coolant is being transferred to the radiator). If you think the fan is running when it shouldn't check for possible DTCs, even if your engine light is not on. What may be the problem? We were having some trouble with our car overheating on a road trip, and we had turned the A/C off along with anything else that we didn't need to have running, but it turned out that the fans weren't spinning when the car was overheating, so I guess it was a bad temperature sensor or circuit, but we turned the A/C on and were able to finish our road trip, so thanks! It can rhyme and convey both compliments and insults. I have replaced: Coolant temperature sensor, thermostat, PCM, Both fans (complete unit), Wiring from the fans to the relays and plugs oh and the relays yet the driver side fan still wont come on. Question: Why does my Toyota Corolla Ae101 radiator fan spin in slow mode even after a long ride? Puller-style fans mount behind the radiator and draw air through the core. My son will come on but it'll run slow and stop. Closely examine the wires for cuts or damage. If necessary, check with your local dealer if you are using an original system or a reliable independent shop. I don't know if it is because it's spring time it's not too hot. Please respond. Hi, I have Mitsubishi gallant v6 2004. If the cooling fan motor and fuses, breakers or fusible links seem to be in working order, it's time to check the circuit and related components. The universal fan has only 2 wires, one black & one blue. Connect fan directly to power for testing. Is this a huge problem that I should try to fix? What Is Causing the Motor on an Electric Fan to Slow Down and Stop?. Check that the shields around the radiator are in place. If it's an old system, there could be a leak as well. Basically the black wire is ground and the blue one is positive. Question: My 95 Cadillac DeVille, when I unplug the relay, the fuse blows to the engine coolant sensor. A small amount of resistance always keeps the fan spinning, but it’s basically free-wheeling until the fan clutch engages. Your car switches are electrical components. Here's how to unlock your Nissan Micra when the battery dies. For example, when coolant temperature changes, the thermo switch reports this change to the computer through a voltage signal, which the computer or module uses to activate the cooling fan through a fan relay(s).An electric cooling fan not only helps save energy by running only when the system needs to remove excess heat away from the engine, but helps shield other sensitive circuits and electronic components from heat damage. It might be stuck. https://hubpages.com/auto-repair/Charging-System..... Another possibility is a faulty fan motor. I have a 1999 Grand Cherokee Laredo with a 4.0 L six and towing package. Check the temperature sensor. Recently it rose to the L in normal and I had flushed the system, changed both temperature sensors. Cooling fan comes on when the engine is cold, and when I put key in the ignition and turn it to the on position (not start) the fan goes off. 2. Answer: Check the fan relays in the power box in the engine compartment. Have it diagnosed first before replacing any components. Thank you! The fan moves air across the radiator (and A/C condenser, transmission fluid cooler, power steering fluid cooler… when the car's not moving fast enough for the natural airflow to cool it. However, on most '90s and newer models the control was passed to the car computer or a dedicated module. If the problem started right after replacing the starter, check for a blown fuse. If fan motors are working, and voltage is present at the plug, then the problem could be in the circuit. Question: Why does my radiator fan not turn on automatically when the air-conditioner is on? Question: The Toyota computer assembly theft warning system is broken in my Toyota Corolla. If you don’t … Hope this helps. Question: Why is my car's cooling fan still on after I turn my car off? The fan on the drivers side , under the air cleaner is not running. Hope this helps. 2002 acura rsx auto (overheating)radiator cracked while driving replaced with a new one and switched everything from old to new radiator components but took off the a/c condenser and now, car starts good idle for about 10min and starts overheat fans dont come on, i checked fans motors itself work and fan plugs receiving voltage also checked fuses, wiring harness, havent checked the relays, fan or temp switches,thermostat..before the radiator cracked everything worked good. Instead, they devote their time and energy to appealing to the 18-45 demographic. Is your window stuck? Still, you can avoid much of the confusion using a troubleshooting plan. What could be wrong? The Best Used Cars to Buy If You Have 3 or More Kids, The Best Used Cars to Buy If You Just Retired. Question: What would cause my cooling fans to stay on even when the vehicle is cold? Consult the repair manual for your particular model, there could be a coolant temperature sensor, a separate thermal switch, or a relay issue. The cooling fan should come on immediately or within the next couple of minutes. The fan is not turning on low speed if the engine is on, even if it reaches the heat indicated. If I give the fan a slight push the fan spins. Hope this helps. A/C will turn on the fans immediately with engine cold and keep them on. The multi-function switch is a common fault with your Chevrolet C1500 Suburban. The electric cooling radiator fan, which turns on and off as needed based on the internal vehicle temperature, is an improvement over engine-driven fans that slow down a- usually at times when they are needed the most. Without a set of good tires, your car will not run smoothly and your engine will use more gas than it should. Any suggestions? Any ideas what the problem could be? If there's no problem with the AC, you may use the diagram to trace for voltage. There are no symptoms I'm noticing otherwise. Make sure the fan belt (if equipped) is not loose; check the belt that runs the water pump; listen to the water pump with a mechanic's stethoscope or a length of hose. Answer: The problem could be in the cooling fan circuit, a faulty battery, or (less likely) the charging system. So my radiator fan was inoperative because one of the (bronze)carbon brush worn down completely. Question: So when I get my 2008 GMC Acadia up to temp with AC running and when the cooling fan kicks into high, it blows my 30a fan 1 fuse. Asked by dilloneccdbe898 in Wiconisco, PA on . A worker at Auto Zone said that with the AC on, booth fans should spin. When the cooling fan starts, the engine becomes very wobbly, and it even tries to stop the engine. Hyundai 2006 Elantra radiator fans come on once car is warmed up and stay on until engine is off. Before going into the necessary steps to troubleshoot the fan in your vehicle, though, a brief fan operation description follows. It doesn't happen all the time. The easiest way is to use digital fan controllers. Hi Sir. Electric radiator fans are available in both pusher and puller designs. It has two fans, the Radiator fan seams fine. Presently the striped wire is not connected & after driving about 12 kilometers the temp gauge started to rise & the fan did not come on. But, then again, the factory switch works in sync with ignition timing, fuel, oil temperature, and many other things to give you better engine performance and minimum emissions. Dan Ferrell (author) on September 10, 2018: Follow the voltage using a diagram. Answer: There could be a bad coolant temperature sensor or a stuck AC relay. The chart shows that with two Vardar fans in a push setup, spinning at 1800 RPM, the EK-CoolStream XE 240 has a cooling power of 350W/10°C. Fuses are in tact. 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