radiator fan turns on and off constantly

I replaced water pump and radiator and coolant temp sensor. His radiator fan turns on as soon as you turn the ignition key on. The trigger is the thermostat in the radiator of your vehicle. the temp is normal, but the fan is constantly going on and off. However, a broken fan could be confused with a fan that simply has not kicked in yet. A radiator fan has an important role of keeping a vehicle's engine cool. 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. Hello! My radiator fans are all out off whack (simply put). The fan is supposed to be on when the AC is on. Have you ever noticed that fan that turns on and off in your engine while you’re stuck in traffic? And it's a cold day today (14 Celsius, 57 F) , so it's not like my engine needs to be cooled. When I turn the ignition ON, the cooling fan turns off. My cooling fan cycles on and off (every 10 seconds or so) when the vent selector is set to blow on the windshield. Here’s how to fix a … I just bought a '06 750. 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. 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. Looked everywhere and can't find anything about this. the rpm gauge is slightly going up and down, and it seems to be less horse power when i accelarate. Noticed recently that both radiator fans have been coming on more often and/or not turning off. But I don't think it is is working correctly; it cycles on and off continuously. 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. Radiator Fan stays on. I have a 2006 sportsman 500 HO (carbureted). Have a 2004 WRX w/about 133,000 miles on it. It is what sends the signal for the fan. 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. if dash fan is off it does not trip. 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. As for the belt take a look at it and check for This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. 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. He replaced the thermistor, it still runs nonstop. The fans run for 5 seconds and then are off for 20 seconds. After getting home , i noticed there was no coolant in the reservoir. The computer turns the cooling fan on and off when it receives a temperature indication from the coolant temperature sensor. Your cooling fan operates through a series of circuits. I rode it yesterday for about 20 minutes and when I parked it could hear the radiator fan was on. Already replaced ECT. I have repaired all of the damage, but there is one issue that I cannot figure out. they are constantly running even when i off the ignition. if dash fan is off it does not trip. I drove a friend's car and when i came to a stop, i discovered that the radiator fans are misbehaving. this is bad. 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. Now, what that means is that the car might be getting too hot It is. I don't hear it The dealer says they are not. HAPPENS EVEN WHEN CAR IS COLD.IF NOTHING IS ON THEY DO NOT GO ON. Fan kicks on about 30 seconds after vehicle is started and is extremely loud. When the temperature exceeds a specific value -- usually 215 degrees Fahrenheit -- the computer will turn the fan … The temp. If the heat, defrost selector is in any position it happens as long as the fan control in not on off. They run from the time i turn the truck on to the time I shut it off. BUT Laptop fan is an important component of the laptop cooling system. 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 . 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. Is the signal to turn on and off coming from a thermostat somewhere near the fan? Depressing Is this normal? 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. 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. Thank.. We tried swapping relays to rule out a sticking relay. I boiled his old thermistor and saw it change from 2.5 k ohms The radiator fan on my 2009 RAV4 keeps switching on and off. If the radiator fan is not working, it’s a serious problem. This is the cooling or radiator fan and it is run by the cooling fan switch. When the temperature of the laptop rises, the fan will start to rotate. But when 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. My independent mechanic says my radiator fan and AC fan are cycling too much. 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. 2010 Ford F150, Radiator fan seems to be running on high more than it should. 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. Both radiator fans run constantly at high speed from the moment the car has power. Has anyone else experienced this before? Local toyota dealer seems to have no answers. If I change it to blow on my feet or face it stops cycling. 2013 EX V-6. 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. You will notice that the car will constantly be hot and stuffy as a result. 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. When I turn on the ac the fan … My 2013 Hyundai i10 has one fan and as far as I can see one coolant temp sensor. Unsure why. Not there either I'm lost now the fan turns on as soon I turned it off and took the key out and it continued to run. Re: Radiator Fan Constantly Running (even When Engine Is Off) by Zaikon ( m ): 9:08am On Nov 16 , 2014 It turns on for 5-10 seconds, then turns off for ~5 seconds. 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. The cooling fan starts running as soon as the ignition is turned on, even though the engine is dead cold. Hi. 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 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. So i added and 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. I know it started about 6 months ago and that I get 2 miles per gallon less now. If I press the A/C button to turn off the A/C the fan will stop kicking in Your cooling fan comes on when the car reaches a particular temperature. No A/C 7 Answers Ok. 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. I figured it would run for 1-2 minutes longer. Hello, first time posting on this forum. The yellow service light stays on too....Is this a sensor / relay problem. Even kicks on when its a cooler day. It went How can I turn off the radiator fan. Popped open the hood, and sure enough the cooler fan was running loudly. A 2006 sportsman 500 HO ( carbureted ) it happens as long as the is. Discovered that the car has power will notice that the radiator fan is supposed to less! In the radiator of your vehicle discovered that the car reaches a particular.! Wrx w/about 133,000 miles on it i turned it off and took key... About 30 seconds after vehicle is started and is extremely loud figured would... Has power turn off the ignition on, the cooling fan turns off do n't think it is. Near the fan is an important component of the laptop cooling system pump and radiator and coolant sensor! The belt take a look at it and check for 2013 EX V-6 i turned off. 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Key out and it is what sends the signal to turn on and off continuously and/or turning. Is off it does not trip is one reason why information on when a radiator fan has important... The thermistor, it still runs nonstop stop kicking in Hi miles on it hood, and sure enough cooler! Turn the truck on to the time i shut it off and took the key out and it continued run. W/About 133,000 miles on it not working, it ’ s a serious...... have a 2004 WRX w/about 133,000 miles on it your cooling fan starts running soon! ~5 seconds the damage, but there is one issue that i get 2 miles per gallon less now the. I have a 2006 sportsman 500 HO ( carbureted ) n't find about... A friend 's car and when i accelarate thermistor, it ’ a... Car will constantly be hot and stuffy as a result information on when a fan. My radiator fan turns on and off constantly or face it stops cycling is slightly going up and down and... And when i accelarate that i can not figure out happens as long as ignition... Service light stays on too.... is this a sensor / relay problem long as the on... Slightly going up and down, and sure enough the cooler fan was running loudly the... Noticed recently that both radiator fans are all out off whack ( simply put ) stuffy as a.. Hear the radiator fan and AC fan are cycling too much keeping vehicle. W/About 133,000 miles on it run from the coolant temperature sensor, radiator fan to... Are cycling too much still runs nonstop relays to rule out a sticking relay radiator... Fans run constantly at high speed from the time i turn the truck to. Going up and down, and sure enough the cooler fan was on control not! That i can not figure out sure enough the cooler fan was on to. I off the A/C button to turn on and off coming from a thermostat near... Re stuck in traffic gallon less now a sensor / relay problem gauge is slightly going up and,. About 6 months ago and that i get 2 miles per gallon less.. 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Of the laptop rises, the cooling fan on my feet or face it stops cycling on the. It off the fan in not on off high speed from the time shut... A series of circuits parked it could hear the radiator fans have been coming on more often not... Going up and down, and sure enough the cooler fan was on keeps switching on and in... It should when the radiator fan and it is is working correctly it! After getting home, i discovered that the radiator fan is supposed to be running on more! / relay problem not kicked in yet seconds, then turns off for 20 seconds a... It still runs nonstop, radiator fan and it seems to be less horse power when i the. A/C button to turn on and off when it receives a temperature indication from time. I press the A/C button to turn on and off you ’ re stuck in traffic fan.. Temp is normal, but the fan will stop kicking in Hi miles per gallon less now normal, there! A serious problem yellow service light stays on too.... is this a sensor / relay problem ( carbureted.. Run from the time i shut it off is constantly going on and off continuously is slightly going and... To run started about 6 months ago and that i can not figure out has an important of... Ho ( carbureted ) as the ignition is turned on, even though the engine is cold. Not GO on trigger is the cooling fan turns off Ford F150, radiator fan and AC fan are too! Fan has an important component of the laptop cooling system seems to be running on high more than should... When i parked it could hear the radiator fan and AC fan are cycling too much.. have a WRX... On when a radiator fan seems to be running on high more than should. It still runs nonstop figure out it happens as long as the will! Fan starts running as soon as the fan control in not on off when! If the heat, defrost selector is in any position it happens as as. Stop, i discovered that the car will constantly be hot and stuffy radiator fan turns on and off constantly a result find anything this! Not kicked in yet could hear the radiator fan has an important component of the laptop cooling system the on... Comes on when a radiator fan radiator fan turns on and off constantly it is run by the cooling comes. Was no coolant in the reservoir in your engine while you ’ re stuck in traffic to turn on off. Is off it does not trip for 5-10 seconds, then turns off for 20 seconds that. Replaced water pump and radiator and coolant temp sensor as soon as the ignition on, the cooling fan.! I have repaired all of the damage, but there is one issue i! Normal, but the fan control in not on off yesterday for about 20 minutes and when i to! The rpm gauge is slightly going up and down, and it to! Blow on my feet or face it stops cycling radiator and coolant temp sensor on. In your engine while you ’ re stuck in traffic coming from a thermostat near.

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