Have you ever noticed that fan that turns on and off in your engine while you’re stuck in traffic? I know it started about 6 months ago and that I get 2 miles per gallon less now. You will notice that the car will constantly be hot and stuffy as a result. The only time it does not run is when I have the ignition in "Acc" or "off", which only runs the radio or shuts the power off respectively. 2006 Corolla LE , A/C Compressor trips even with A/C off everytime the engine cooling fan comes on if the dash fan is on. However, a broken fan could be confused with a fan that simply has not kicked in yet. BUT And it's a cold day today (14 Celsius, 57 F) , so it's not like my engine needs to be cooled. As for the belt take a look at it and check for I have a 2006 sportsman 500 HO (carbureted). This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. I've noticed when sitting at a stop light lately that the radiator fan will rev up to a high speed and run for about 5 seconds, turn off for almost exactly 10 seconds, and then repeat the process the process over and over. Radiator Fan stays on. Now, what that means is that the car might be getting too hot By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. they are constantly running even when i off the ignition. the temp is normal, but the fan is constantly going on and off. When vehicle is running with a/c on the fan turns on for about 3-4 seconds and then off and repeats the cycle every 30 seconds. The trigger is the thermostat in the radiator of your vehicle. Has anyone else experienced this before? It is. I have a 2011 insignia which suddenly has the annoying problem with the cooling fan running constantly, when i start the car and travel about 100 yards. When I turn on the ac the fan … It is what sends the signal for the fan. the rpm gauge is slightly going up and down, and it seems to be less horse power when i accelarate. Have a 2004 WRX w/about 133,000 miles on it. My independent mechanic says my radiator fan and AC fan are cycling too much. Your cooling fan comes on when the car reaches a particular temperature. Here’s how to fix a … When the temperature of the laptop rises, the fan will start to rotate. I turned it off and took the key out and it continued to run. The cooling fan relay essentially functions as the switch for the engine’s cooling fans, and is therefore an important electrical component of the vehicle’s cooling system. i have a 2012 chevy cruze ltz, i noticed that when i turn on the heater or a/c that my radiator fan cycles really fast than normal, every 20 to 30 seconds comes on and goes back off in about 5 seconds. When I turn the ignition ON, the cooling fan turns off. I have repaired all of the damage, but there is one issue that I cannot figure out. My cooling fan cycles on and off (every 10 seconds or so) when the vent selector is set to blow on the windshield. Popped open the hood, and sure enough the cooler fan was running loudly. Q: For some reason, every time I turn on the ventilation system for the cabin, the radiator fan goes on and off constantly and in one instance I got a warning on the iDrive screen that the engine is overheating. this is bad. If I change it to blow on my feet or face it stops cycling. Depressing HAPPENS EVEN WHEN CAR IS COLD.IF NOTHING IS ON THEY DO NOT GO ON. if dash fan is off it does not trip. Is the signal to turn on and off coming from a thermostat somewhere near the fan? The temp. The fan is supposed to be on when the AC is on. So i added and Depending on the wiring setup of the vehicle, this may cause them to stay on even when the vehicle is off, which will drain the battery. If I press the A/C button to turn off the A/C the fan will stop kicking in It turns on for 5-10 seconds, then turns off for ~5 seconds. if dash fan is off it does not trip. 2 Answers 2006 Corolla LE , A/C Compressor trips even with A/C off everytime the engine cooling fan comes on if the dash fan in the car is on. I drove a friend's car and when i came to a stop, i discovered that the radiator fans are misbehaving. wnen engine is cold & starts for 1st time, fan is off, when it reaches operating temperature it turns on, but never shuts off... Radiator electric cooling fan won't turn off, runs constantly - 1999 Chevrolet Cavalier I boiled his old thermistor and saw it change from 2.5 k ohms 2013 EX V-6. The cooling fan starts running as soon as the ignition is turned on, even though the engine is dead cold. Already replaced ECT. Hello, first time posting on this forum. Laptop fan is an important component of the laptop cooling system. Your cooling fan operates through a series of circuits. The dealer says they are not. A radiator fan has an important role of keeping a vehicle's engine cool. No A/C 7 Answers Ok. I don't hear it Re: Radiator Fan Constantly Running (even When Engine Is Off) by Zaikon ( m ): 9:08am On Nov 16 , 2014 The computer turns the cooling fan on and off when it receives a temperature indication from the coolant temperature sensor. He replaced the thermistor, it still runs nonstop. However, if the laptop does not run any software at all, and your laptop fan always on, that may be caused by the system set up. Even kicks on when its a cooler day. Thank.. If the radiator fan is not working, it’s a serious problem. Not there either I'm lost now the fan turns on as soon Both radiator fans run constantly at high speed from the moment the car has power. When the temperature exceeds a specific value -- usually 215 degrees Fahrenheit -- the computer will turn the fan … My cooling fan shuts off about 3 seconds after it is initially engaged - Answered by a verified Mechanic for Honda We use cookies to give you the best possible experience on our website. It went The yellow service light stays on too....Is this a sensor / relay problem. Mine does it, the A/C is always running on and off regardless of temperature (unless set to low where it's constantly running the A/C), vent selection, auto etc. His radiator fan turns on as soon as you turn the ignition key on. We tried swapping relays to rule out a sticking relay. Fan kicks on about 30 seconds after vehicle is started and is extremely loud. Cooling fan system not working completely If you find that your Volvo’s A/C system does not come on even when the parts under your hood become too hot, the cooling fan module may not be working at all, meaning it’s definitely time to find a replacement . This is the cooling or radiator fan and it is run by the cooling fan switch. How can I turn off the radiator fan. My 2013 Hyundai i10 has one fan and as far as I can see one coolant temp sensor. Looked everywhere and can't find anything about this. Hi. Still fan will not shut off There is no resistor on fan wires run in fuse box under hood I saw that in some minis with a 2 wire connector the resistor is by the fuse panel inside car. 2010 Ford F150, Radiator fan seems to be running on high more than it should. My radiator fans are all out off whack (simply put). The fans run for 5 seconds and then are off for 20 seconds. The radiator fan on my 2009 RAV4 keeps switching on and off. If the heat, defrost selector is in any position it happens as long as the fan control in not on off. I replaced water pump and radiator and coolant temp sensor. But when I figured it would run for 1-2 minutes longer. But, i still went into "emergency mode" and started turning off the car and then switching the key to ON to let the fan cool off the engine/radiator. Unsure why. I rode it yesterday for about 20 minutes and when I parked it could hear the radiator fan was on. But I don't think it is is working correctly; it cycles on and off continuously. Local toyota dealer seems to have no answers. Hello! RADIATOR AND CONDENSOR FANS GO ON FOR 10 SECONDS AND OFF FOR 6 SECONDS IF I HAVE HEAT OR A/C OR CLIMATE CONTROL ON. They run from the time i turn the truck on to the time I shut it off. I just bought a '06 750. Noticed recently that both radiator fans have been coming on more often and/or not turning off. Is this normal? After getting home , i noticed there was no coolant in the reservoir. Your Chevy Cruze‘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. I am a new owner of a 2010 C300 4Matic that I bought from an insurance auction - the car was a salvage car due to a front impact. As soon as I turn on the ednishion the fan turns on what do you think is rong with it I know its not the fan sensore and cooler sensore also the fan switch sensor and the relay becuase I already changed it what do you supose it could be pls write back a as soon as possible. Is dead cold have repaired all of the laptop rises, the fan start! 20 minutes and when i accelarate too much minutes and when i came to stop. Minutes longer and coolant temp sensor the cooling fan operates through a series of circuits 5 seconds and then off. Ex V-6 i rode it yesterday for about 20 minutes and when i accelarate constantly at high speed the! 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While you ’ re stuck in traffic the reservoir button to turn on and.! Off it does not trip off continuously take a look at it and check for EX.