See if the problem persists after taking this initial step. Check the car’s temperature gauge to get an analysis. In the article, we are going to explain all the main reasons why the cooling fan of the engine’s radiator works not only when the coolant temperature reaches 100 degrees Celsius (212 F) but always runs, even when the ignition is off. Airflow speed through a radiator is a major influence on the heat it loses. Problems and symptoms of a bad or failing fuel pump and how to test it, Timing belt vs timing chain. I sat out in the drive for a while earlier when the car was off and fan was still running. 5 Posts . 99.9% you have a bad cooling fan relay. Ask Your Own Honda Question. There is absolutely no more driving it after that without an expensive repair job or whole new car. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. Over time, the clutch assembly will begin to wear and require servicing. Diagnosing volvo cooling fan issues. Answered in 6 minutes by: ... My daughter drove the car home last nite, outside temp about 45, and shut the car off. If you have an overheating problem in traffic, keep an eye on your temperature gauge. Once you hook up the machine, it will give you the steps to retrieving the error message and interpreting the data. I bought the diesel for its super 30+ MPG in city driving. In this case, the fan often runs constantly when the AC is on.eval(ez_write_tag([[300,250],'carphrases_com-leader-1','ezslot_7',108,'0','0'])); If it fails and the refrigerant leaks, the system “sees” that the radiator is overheating and tries to cool it down with the fan that is always on. It is possible that this problem of your car’s fans constantly running is some sort of mechanical or electrical error from a poor sensor or other component. 2 people found this helpful. When you click links on our site we may earn an affiliate commission. Check if power comes from the relay to the fan using a multimeter (the PIN can be found in the diagram). Share this conversation. It is not uncommon for the fan to run for a short time after turning off a car. IF you shut off your Honda Acura and the cooling fan keeps running? Verification should be performed sequentially based on the most likely reasons. The very first thing to ask after the question, “why does my cars fan keep running,” is “is my car overheating? There are companies that do this specifically and that’s all they do. Customer Question. 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. the ECT sensor and the ambient air temperature sensor.If the engine coolant temperature (ECT) sensor—located just below the distributor—begins to fail, it's likely that your fan will stay on for an extended period of time after the car's engine is shut off. Copyright © 2020 YourAmazingCar. The car stalls when braking. To find out that this is indeed the fault, you should notice that the engine will have a difficult start when it’s not heated enough. This is a very rare feature for cars, and shows the attention to detail and build quality of the Palio. Never fun the vehicle when doing this, however. The car is overheating while idling and the fan comes on to help keep it cool, but it still overheats. While at a weekend picnic, my car was sitting in the driveway relatively close to where I was sitting. 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. Though Ive never seen my fan continue running after shut off- here in So cal on a a hot day. My dash on my 2011 equinox is saying "A/C off engine too hot" but my gauge is reading cold. The fan can be shut off when the engine temperature warrants. 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. Like any Euro, it's got a few quirks but overall it's been an honest, fun to drive sports wagon. Did you ever have a mechanic look at the radiator before or the fans, more specifically? Best 8 Inch Subwoofers (Review & Buying Guide), Best Car Amplifiers For Bass (Review & Guide), Reset an Airbag Light With OBD2 SRS Scanner Tool, Best Winter Wiper Blades (Review & Guide), Best LED Fog Lights (Full Reviews & Guide), Meguiar's G55032SP Complete Car Care Kit Includes 12 Premium Products, Wireless Car Charger Mount, Auto-Clamp Qi Car Mount, Bluetooth FM Transmitter for Car, QC3.0 Wireless Bluetooth FM Radio Adapter Music Player Car Kit, Car Backseat Organizer with Touch Screen Tablet Holder + 9 Storage Pockets Kick Mats Car Seat, Car Vacuum Cleaner high Power - 110W 12v Corded auto Portable Vacuum Cleaner for Car Interior Cleaning. If your coolant level is low there is a chance that you will get air in the system … It also runs after I have turned the ignition off for about 1 minute. 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. yes, the roadside rewires did some magic on the thermostat and the car starts with the fan running (with or without ac)n yes, the fan runs all through for 2 hours or even more (after the engine has been shut down and has cooled off completely). They have wired the fans directly into the power source with direct current, meaning they bypassed the relay and traditional electrical system of the car. 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. In summer, driving with a cooling fan that runs frequently is undesirable, but acceptable. Those three relays are controlled by the Engine management 'puter. Though you can hear the fan/sucking air coming from the base of the windshield- where the air inlet is. Tint your windows. I noticed the fan would come … If the relay shorts internally, it may cause power to be permanently switched on, … 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. There are temperature sensors and some cars have separate sensors for the gauge itself. A Bad Fuse. Engine repair is very expensive, so checking these other issues can save a lot of misery and money in the long run. Now you have tried to diagnose this problem but you are still coming up short with an answer to the question, “why does my car fan keep running?” Here is one other possible scenario. Usually, it is in the range + 87 and + 95 ° C (188 and 194 F). So why is the cooling fan constantly running? Accordingly, the diagnosis must begin with checking the relay, wiring, and the presence of errors in the ECU memory. my honda 2004 accord fan keeps running after the car is turned off. Category: Honda. Top 5 Things You Should Always Keep in Your Car, One possible solution noted from other drivers that have had this similar issue in the past is that their radiator just needed to be flushed, Best Under Seat Subwoofer (Reviews & Guide), Best Truck Tonneau Cover Review & Guide 2020, Oil Control Valve Symptoms and Replacement Cost, Sings and Symptoms of Bad MAF Sensor you Need to Know, Classic Morgan Cars (Top 10 Models Offered & More), White Smoke From Exhaust On Startup (Top Causes), Best 12 Inch Subwoofer (Review & Buying Guide), Best 10 Inch Subwoofer (Reviews & Buying Guide), How to Make Car Speakers Louder Without Amp, Best 4 Channel Car Amplifier (Review & Guide), Best 0w-30 Synthetic Oil For Quality & Performance, Best 5w-20 Synthetic Oils (Reviews & Guide). What should I do if the engine fan never … IF the coolant was low it's possible that the engine was trying to cool itself after shutdown. To understand how the cooling fan should work correctly, you need to know at what temperature the electronic control unit (ECU) turns de radiator cooling fan on. However, the other day my Audi had its first real "problem." Whenever something electrical doesn’t work, the first thing to check is the fuse. If the fuse has gone, the mechanic will need to replace it right away. Ive seen cars do that-- usually hondas that I notice with fans running with vehicle off- no on inside. Thus, to bring the twmperature of the coolant/water down, the fan will come on for a few minutes till it is cooled. A discussion on Shutting down engine when radiator fan is running by Mahesh - Check out 15 posts on this thread. You car’s cooling system is probably compromised - either low coolant (due to leaks) or a thermostat problem or radiator issue. What happens if you put too much brake fluid in the car? 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