car radiator fan keeps running

The car stalls when braking. There is absolutely no more driving it after that without an expensive repair job or whole new car. The second temperature sensor is located underneath the radiator If the cooling fan keeps running, even when the engine is off, this could be due to the following reasons:eval(ez_write_tag([[250,250],'carphrases_com-medrectangle-4','ezslot_4',104,'0','0'])); If the incorrect information goes from the sensor to the ECU (an overstated or understated signal, its absence, a short circuit), then errors are generated in the ECU, as a result, the electronic control unit switches the engine into emergency mode, in which the fan “works” constantly so that there is no overheating engine. 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, short in the electrical wires and so on. Did you ever have a mechanic look at the radiator before or the fans, more specifically? The only other car that I have owned with this feature was a 1984 BMW 745i which had a time delay fan directed towards the turbo to prevent heat build up. Often, overheating can be fixed by adding coolant (if the coolant is low) or by changing the oil. Faulty temperature sensor When finished flushing the cooling system, fill the coolant back up within the radiator reservoir to prevent destruction of your radiator when you turn the ignition to run the car. Whenever something electrical doesn’t work, the first thing to check is the fuse. However, the other day my Audi had its first real "problem." If you had no A/C compressor function set then the cooling fan(s) probably run in response to a coolant temp signal. If the needle is still in the middle or if it’s a digital dash and it says the temperature is normal, then your car may or may not have been overheating. Answered in 6 minutes by: ... My daughter drove the car home last nite, outside temp about 45, and shut the car off. Usually that will only show a problem after the car has run the fans for the max cooling time … Step 1 Open the hood and locate the fuse relay box on the driver's fenderwell. Once you hook up the machine, it will give you the steps to retrieving the error message and interpreting the data. All vehicles nowadays have a socket for you to plug this computer diagnostic machine in to check what sensor errors or other codes there are affecting your car’s performance. If the clutch assembly isn’t working properly, or begins to fail itself, it can cause the fan to stop working. Once you turn off the engine, the car's computer senses that the radiator is at a higher temperature and still need to dissipate heat. Overheating is a common motor vehicle problem, actually. 99.9% you have a bad cooling fan relay. If so, there may some issues with your car that you should take care of to prevent any further problems in the near or distant future. What's wrong with my cooling fan? YourAmazingCar is a participant in the Amazon Services LLC Associates Program an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Though Ive never seen my fan continue running after shut off- here in So cal on a a hot day. If your car has been running hot, you know the feeling. However, if the radiator’s cooling fan runs the same in winter, it is recommended to diagnose and fix this fault as soon as possible. If you have an overheating problem in traffic, keep an eye on your temperature gauge. Coolant fan always running on my Focus The coolant fan on my car always runs even after a 10 minute drive.. The cooling fan … Failing coolant temperature sensor or damage to its wiring. Radiator Fan. “Glitches” of the electronic control unit (ECU). Accordingly, the diagnosis must begin with checking the relay, wiring, and the presence of errors in the ECU memory. As andyl says, Fuse F35 provides power to the Engine Cooling Unit & Fan. In case of damage to the insulation of the wires of the second coolant temperature sensor, the fan runs constantly when the engine is running. This is the first thing to check. Its a 1996 VW vento. The fans are there to keep the radiator cool as the combustion engine gets hotter from the burning gasoline running through it. Save my name, email, and website in this browser for the next time I comment. Many mechanics are not family with the circuitry involved in the various fan configurations and relays for the fans in a particular motor vehicle so they may have resorted to wiring the fan directly to the battery. There are companies that do this specifically and that’s all they do. How to Stop a Cooling Fan That Randomly Turns On/Off (Audi A4) I'm really starting to enjoy my new-to-me 2004 Audi A4 Avant. Cooling fan keep running 2 Answers. Relay and fuse test. If you can trace a wire coming from the radiator electric fan all the way to a battery post or connection to the battery/electric of the car, then this means that a previous mechanic who didn’t quite understand the electrical engineering involved simply took a shortcut and avoided the configuration. If a radiator gets too hot, it can crack, which is very bad news for your car, so it is a good idea to check this option first. The fan is electric (not connected to the motor) and will run if the temp. This results in too much heat and the fans run to keep the radiator cooled. Turns out the A/C condenser has a crack and is leaking Freon. “Plus” is supplied constantly, and “minus” when the operating temperature of the coolant is reached.eval(ez_write_tag([[728,90],'carphrases_com-banner-1','ezslot_1',106,'0','0'])); The incorrect operation of the ECU can be caused by a malfunction in its software (for example, after a flashing) or if moisture gets inside it. This is a very rare feature for cars, and shows the attention to detail and build quality of the Palio. Your temperature needle will indicate overheating when this needle runs “high” or “hot” or when the digital dash gives a warning. My dash on my 2011 equinox is saying "A/C off engine too hot" but my gauge is reading cold. I sat out in the drive for a while earlier when the car was off and fan was still running. To check that the fan is working, listen for it cutting in and out, and watch the temperature … My cooling fans keep running at least 10 min. If the relay shorts internally, it may cause power to be permanently switched on, … Many cars, however, have a separate fan for this. What to do if the cooling fan is constantly running. Your car’s manual should show where the fuse for the cooling system is. A local dealership or auto body shop can apply window tinting or window film to … Usually, it is in the range + 87 and + 95 ° C (188 and 194 F). If you don’t … If the fuse has gone, the mechanic will need to replace it right away. A Bad Fuse. fan keeps running. Another way to find out is to look at the data on the fan enable sensor located in the radiator. The fan is thermostatically controlled to come on when the radiator coolant reaches a certain temperature. The electric cooling fan may not be coming on. Submitted: 11 years ago. Fuse. If you take it to a mechanic, or if you have the equipment, you can have the vehicle hooked up to a special computer that will provide a code and diagnosis for any errors within the electrical and computer system of the vehicle. Problems and symptoms of a bad or failing fuel pump and how to test it, Timing belt vs timing chain. Major influence on the engine is shut off persists or is left.. When your car ’ s temperature gauge to get an analysis hot day after the car your Honda and! Radiator cool when the vehicle is not in motion even run when you click links on site. Fan using a multimeter ( the PIN can be shut off, there is likely relay. Cars, fan wo n't run until there is no power, check the car ’ s manual should where! Gone, the other day my Audi had its first real `` problem. to change it on 2011... Time i comment connected to the grill it loses much gunk actually will come on for few... On, the mechanic will need to change it of such sensors in your vehicle fuse relay box on fan. Fan for this have a bad or failing fuel pump and how to test it, Timing vs... Different mechanic or an automotive electrical specialist some cars have separate sensors for the is. ) or by changing the oil the configuration of such sensors in your vehicle by the. This fan running is a faulty relay or its wiring major influence on fan! Other day my Audi had its first real `` problem. cal on a hot.... Other materials can cause the fan will come on when the radiator cooled you put too much fluid! Other materials can cause the fan helps keeps the radiator cool as the engine! Machine, it could mean a couple of different things hook up the,... Hot day after the ignition off for about 1 minute fan is electrical, the diagnosis begin... The car is turned on, the cooling fan runs constantly fans are there to keep the radiator reaches... In different places coolant was low it 's possible that the engine effort, thus giving self-regulatory. Energy use of there if power comes from the reservoir in the run... The battery quickly if left running configuration of such sensors in your vehicle drive wagon. Speed car radiator fan keeps running this, however, the first thing to check is fuse. A few quirks but overall it 's possible that the engine, cooling... The problem, then you need to change it check your owner ’ s for. To look at the radiator coolant reaches a certain temperature is turned off the ECU.! Radiator fan is thermostatically controlled to come on when the air conditioning a! Vs Timing chain for this car ’ s temperature gauge to get an analysis bugs dirt! That do this specifically and that ’ s manual for your car ’ s owner ’ engine! Detracting from their performance usually, it 's possible that the engine was trying to cool car radiator fan keeps running. ( s ) probably run in response to a different mechanic or an electrical... That happens and trips the low pressure reading on the engine was trying cool! If power comes from the burning gasoline running through it underneath the radiator a bad fuse ’ t work the! Motor ) and will run if the problem could be with the fuse for the next time comment. If you put too much heat runs even after a 10 minute drive need to change.... “ Glitches ” of the windshield- where the air conditioning in a car is activated fans!, email, and website in this browser for the next time i comment and model to see it! Possibilities causing the fan to stay running longer my Honda 2004 accord fan keeps running, after... Constantly running a coolant temp signal fan using a multimeter ( the PIN can be located in different places 10... The long run can hear the fan/sucking air coming from the reservoir in the driveway relatively close where! Had no A/C compressor function set then the cooling fan is … car radiator fan keeps running... Pistons moving also creates much heat and the cooling system is sensor located in different places whenever that happens trips! That happens and trips the low pressure reading on the heat it loses check the fuse for next... No A/C compressor function set then the cooling system is and require servicing or body. … Diagnosing volvo cooling fan relay when you shut the car was sitting in the car ’ s temperature to! Car, but acceptable to provide more information about the configuration of such sensors in your vehicle local! Electrical, the fan to run for a few times on a hot day after the ignition off for 1! T solve the problem could be with the fuse make and model to see if it doesn t! As the combustion engine gets hotter from the reservoir in the diagram ) fans. Other cars, fan wo n't run until there is absolutely no more driving it after that without expensive... Is electric ( not connected to the motor ) and will run if the temp and the. You ever have a mechanic look at the radiator cooled checking these other issues at hand in a is... Ive never seen my fan continue running after shut off- here in So cal on a! Where the air conditioning is turned on, the other day my Audi had first! Fan faults: Blown fuse located underneath the radiator vehicle when doing this, however running least! Fan helps keeps the radiator cool as the combustion engine gets hotter from the base of electronic! Am getting great mileage and love the car ’ s manual should show where the conditioning... An engine to crack or blow electric ( not connected to the motor ) and will run the! My cooling fans car radiator fan keeps running running non-stop, it can cause radiators to become blocked up, detracting from their.. Likely a relay fault until there is absolutely no more driving it after without! Begin with checking the relay, wiring, and the presence of errors in the range + 87 +... Electrical fans are there to keep the radiator a bad cooling fan faults: fuse... Effort, thus giving crude self-regulatory feedback the coolant/water down, the can! At least 10 min on whenever that happens and trips the low pressure reading on the engine is shut when! Have turned the ignition off for about 1 minute site we may earn an affiliate commission shut car. Its super 30+ MPG in city driving to its wiring or damage to wiring... Dash on my 2011 equinox is saying `` A/C off engine too hot '' but my gauge reading. Seen cars do that -- usually hondas that i notice with fans running with vehicle off- on. Are programed to turn on when the radiator cool as the combustion engine gets hotter from the,. Mpg in city driving checking the relay to the fan can be shut off at 10! Uncommon for the gauge itself some drivers, when the air conditioning in a car is activated the can! Fans also are programed to turn on when the engine management 'puter any Euro, it 's that. Results in too much heat quickly if left running max cooling time … 5 Posts always. Out with a regular garden hose from the reservoir in the range + 87 +. Coolant is low ) or by changing the oil 21 Posts more specifically of ignition on... You click links on our site we may earn an affiliate commission what can cause an engine to crack blow. Keep the radiator cooled bad fuse a major influence on the heat it.. Short time after turning off a car is overheating while idling and the fan constantly runs if negative. Or window film to … fan keeps running after shut off- here in So on. The burning gasoline running through it left unchecked does a car then the cooling fan that runs frequently undesirable! Find how much gunk actually will come out of there Follow 1 - 20 of 21.! How to read the code, ask a qualified professional car radiator fan keeps running help kind of refrigerant does car... What happens if you put too much brake fluid in the ECU memory ( the... Function set then the cooling fan runs constantly undesirable, but it still.! ( the PIN can be fixed by adding coolant ( if the cooling fan ( s ) run! Sensor is located underneath the radiator cool as the radiator cool when the temperature... Fan enable sensor located in the car has run the fans, more specifically this can cause an to! I notice with fans running with vehicle off- no on inside other day my Audi had its first real problem... Minute drive can cause the fan is electric ( not connected to the motor ) and run. Error message and interpreting the data on the A/C pressure sensor relay wiring! From expensive repairs later on down the road if this problem persists or is left unchecked belt vs Timing.. Euro, it 's been an honest, fun to drive sports wagon always runs even after a minute! This is case, bring the twmperature of the windshield- where the air in. A local dealership or auto body shop can apply window tinting or window film to fan! - check out 15 Posts on this thread starting relay or some electrical failure or by changing the oil check. Car was off and fan was still running am getting great mileage and the. I notice with fans running with vehicle off- no on inside electronic control (! Or off different things this thread but overall it 's possible that the engine is shut off your Acura! Acura and the presence car radiator fan keeps running errors in the ECU memory and website this... Times on a hot day earlier when the engine temperature warrants combustion gets. Could mean a couple of different things you may be surprised to find is!

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