Your Chevy’s engine control unit signals the fan when to turn off or keep running. If it is doing this an abnormal amount, the sensor that is operable with the ignition off may be failing. If you get the on at 185 and off at 165 when the coolant got to 185 the fan would come on to assist and this is what would be. RASMATAZ. #2 · May 3, 2009. 1948 - 1956 F1, F100 & Larger F-Series Trucks - Electric Fan Operation - I have a electric fan installed on my F-1 (351W) with a relay and temperature sensor. This calibration contains a function that allows the cooling fans to run for a short period of time, after the vehicle has been driven under certain conditions, when the vehicle is shut off. 237 posts · Joined 2005. fan. UK/Ireland Location: Fife. rfixer. So, the fan will run for a bit to lower temperature, even if the car is shut off. so from cold at about 20 degrees. coolant is full. 07. It's a busy car after you shut it off! Totally normal - as above, I'd be concerned if they didn't run. There's a vacuum operated valve on the EGR cooler that makes that high pitched noise and then you hear the valve let go. EasyOBD is showing coolant temperature to be 20 to 76 degrees. 2009 Volkswagen Jetta 60,250 mi, Visitor. below sensor body & sensor will come out with slight pulling on sensor connector after checking fld. There was an ambient temp sensor I believe added to the circuit for activation. It has a 460 v8 gas motor. won't create much of an issue with driving. 1993 Escort: radiator fan. Leaking Coolant or Low Coolant Level. Checking it - Answered by a verified Chevy Mechanic. Mark helpful. This fuse should have power on both sides with the ignition in the on position. Reactions: stallion_412 and wjburken. If the fan switch is good, check the radiator fan by using the jumper wires from the battery to the electrical. I pulled into the garage this morning and shut the car off, I noticed a fan running pretty loud from the front engine area, car is still pretty new so no big. I'm guessing the coolant temperature. 1. A bad one can easily cause a misfire or poor engine performance. A temperature sensor or fan relay that isn’t correctly working could be one reason the fan. Then once we begin to drive it appears to shut off. 2008 Sprinter 2500 170 - camper van. Built as a “world car” through collaboration with Ford of Europe, the Escort shifted to front-wheel-drive and would remain in production into the early part of the 21 st Century. This can prevent hard starting that can happen with a hot engine. Gave it a few minutes and then fired up the car again. This in turn is turned on the the ECR (engine control relay, I guess) relay R14. Mechanic. It is programmed to keep running even after you’ve shut off the engine. 33 Answers. Still, CHECK YOUR RADIATOR IS FULL, because dry engines die young. I checked the inertia switch under the dash and hit the reset button and used my test light on that and there's power going in and out of it, i used to my. If the engine idle speed is too high, it may cause the car to diesel after it is shut off. 2. so from cold at about 20 degrees. Posted February 16, 2010. by mmsstar » Wed Nov 16, 2011 5:25 am. which means sensor is working as it should. 51,000 automatic. The ECU uses various sensors to energize the relay. Cj7jeepoffroad. It’s normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool. Fan kept running after engine shut off 4 Answers. The average ignition relay replacement cost is between $15 and $100, depending on the car model and labor costs. Popped the hood and all coolant levels. Your car’s cooling fan can be activated in one of two ways: The. One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. The coolant only came out of the overflow and radiator seems fine. Same thing--fan ran for five minutes after turning off the car. To understand how the cooling fan should work. • 2 yr. The fans will stay on for approximately 3 minutes. The fan control module in a C5 2. If the relay fails to click it is bad. If it goes higher than normal, this could be the problem. OP, it shouldn’t do this for more than say, 30 minutes. Problem sorted! But why didnt Ford check this on their. 2012ff Discussion starter. 42 people found this helpful. @bhurry turn your AC off and see if the fan still stays on. SCARY and potentially DEADLY. The Ford F150 trucks are equipped with an auxiliary fan which is designed to engage and keep running until the engine temperature drops down safe operational degrees. 5 months ago by fitting a new thermostat. The thermostat regulates the coolant flow through the engine and helps maintain optimal engine temperature. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. Current hi. 50] On Southern, hot, humid, high 90F degree days - or higher - my fan stays on for a while after shutting the engine off. coolant fan will not shut off when shutting engine down, I am getting no overheating warnings and coolant level in overflow tank is fine. The cooling fan should start running at approximately 230° F (110° C), which usually happens after 20 minutes of engine operation. Hope this helps. Most cars have a fan-timer function that runs the cooling fan for about five minutes after engine shutdown above a certain coolant temperature. 1 is the location of the relay. . where the radiator fan constantly goes on/gives turning even after i switch off the car, draining my car battery. Past 7 Days: 391. If your engine appears to continue to run after shutting it off, engine overheating may be the cause behind it. When this happens, our coolant decreases, which can make our car fan still running after shutdown to cool down the engine. Cooling fan continued to run. Question and comment. A stuck closed relay can cause (the cooling fans to keep running even when the engine is offline), but some vehicles may run the fans by design after the engine has been shut down. If your car fan stays on even after the engine is turned off, you may have a faulty coolant temperature sensor. This 1986 edition is the sportier GT version in hatchback garb and has possible low. Perfectly normal. If these prove negative, we will have to look further. So I wouldn't worry about that. If it isn’t constant, then the problem lies with the relay. Coolant prevents your engine from overheating when it’s warm outside, and it helps to protect your engine from freezing when it’s too cold. A defective ECU will result in the fan not knowing when to stop running. 3. But it’s best to let your mechanic investigate the other causes. And draining the battery after car is turned off Posted by geebomb on May 24, 2008. 5. If the key is off and you have 12 volts, try disconnecting the wire for the ignition from the solenoid. We call that one a "meep". The fan can run when the ignition is off if the engine coolant is still too hot. Reply Quote. Both the X3 and my mother's 325i (N52 engine) have continued to run the cooling fan for 3-5 minutes after the engine was turned off after climbing a prolonged, steep gradient/mountain. Does the truck also have a mechanical fan and fan clutch? If so that is likely the root of the problem, the. . Disconnected the battery but fan runs on high when hooked back up. This is normal behavior. If the fan still runs after unplugging both sensors, then problem might be with radiator fan control module located behind the glove box. Relay, fuse, sensor and fan check out OK; Fan initializes with the key, then stops; never to start again. . Along with concerning noises, you might also noticed. Then, have a look at the coolant temperatures and level. If the fan stops running, replace that sensor. On some vehicles, disconnecting the electrical connection to the sensor will cause the fan to stop. Don't worry about it unless it runs for more than 15-20 minutes when you shut the car off. Single switches or relays can fail internally causing a number of different symptoms including no start conditions (inoperative fuel pump or PCM), engine running warm due to inoperative cooling fan, or the AC might not blow cold air. . I then restarted the motor with the A/C on. Bad ECU Unit. 3. Thread starter 1fast6; Start date Aug 16, 2010; 1. . However, if the cooling fan relay is damaged or faulty, the cooling fan will continue to run. Additionally, if the cooling fans don’t work or if they keep running, even when the engine is turned off, this could also be indicative of a faulty relay. To diagnose and fix this issue, you should start by checking all of your fuses and relays related to the cooling. 2. So if the ambient temp is 95+ and/or the car is overheating, the fan should run then shut off. 31 people found this helpful. 3. I am using the original 40 Ford ignition switch. Reply Like. The fan did not come on, I let it run for a couple minutes then shut the motor off. Notes:The fan won't shut off after I turn off the engine. 1403 Answers. 640. The cooling fan is powered by a relay in the Front Fuse Box, R12. This fan is usually located at the front of your vehicle, either just in front of the radiator or just behind it. to reinstall sensor. Currently replacing rusted brake line and rear brakes. The lower the coolant level, the less effective it’ll be. 12. My hus. Air conditioning gives hot or cold air as required and the fan has stopped running when the engine is switched off. 2009 - 2014 Ford F150 - Electric radiator fan won't shut off when vehicle is running. Browse Categories Answer Questions. When a thermostat fails it will either open too fast or stay partially closed, both failures are not. I pulled the cooling fan fuse out from the fuse box under the hood and it stopped the fan but when I put it back in it turns back on again and will. Fans. I am aware of the normal after-run function of the electric fan for the engine's radiator. 0 randomly shuts off - 04 with 170k miles. I have left the relay in and let the fan run with the car off thinking it needed time to recognize the temp condition, but after a couple hours, I pulled the relay (R5) again to shut it down. If your temperature gauge still operates when the ignition is switched off, as it does on some cars, you will see. #5 · Jan 3, 2022 (Edited) clarksonfs said: Yes the fan comes on immediately when the relay goes back in - the fan never turns off. Your Chevy’s engine control unit signals the fan when to turn off or keep running. 5. Tl the contact owns a 2013 Ford Escape. The car coolant is the liquid that removes heat from the radiator. A coolant temperature sensor costs $30 to $100, and the labor costs $20 to $150. Now however, there is something else going on. 11. On Diesel engine trucks hold the throttle to the floor during this test. Maybe the fuel pump relay, or loose connections to the pump. Last edited by rfixer; 02-05-2018 at 10:33 PM. Below are a few common causes for the auxiliary fan to engage: Low Coolant levels. So now it's been running for over 7 min. Fans continue to run after for up to 5 minutes after you turn off the ignition winter or summer. The computer looses power with the key off and the same applies to the coolant temperature sensor. If the relay shorts or fails, it will not be able to. It might go on and off a few times on a hot day after the engine is shut off. This can cause the fan to continue running after the engine is off. 6L 15,000. 7, one of two coolant fans won't shut off after engine is off. As we know, that wasn’t quite correct – the NA Escort came out looking frumpy, even in its performance GT trim. or so. The n63TU and S63 share a similar cooling system. mercedessource Tech help - Could be any number of things causing the problem. G. If the motor fails the blades will not be. . Heyoteyo. 2650 Views 17 Replies 11 Participants Last post by 66stang289ci, Apr 3, 2016 Jump to Latest 6. twanlo456 Discussion starter. If the key is off and you have 12 volts, try disconnecting the wire for the ignition from the solenoid. When she arrived at her destination she turned the vehicle off. A defective ECU will result in the fan not knowing when to stop running. The theory is that when the car is shut off, the engine coolant might still be too hot. The lower the coolant level, the less effective it’ll be. Next time - wait by the car and see how long it takes for the fan to quit after you have parked up. SteveF July 10, 2011, 2:14pm 7. Most of the time the fan stops when the engine is Off. The fan comes on at 170 degrees, shuts off at a predetermined temp and comes on when the Vintage Air compressor kicks in. it can run hot with cap off due to the pressure needed to open the thermostat, but it would take about 20-30 minutes for it to run hot. Less likely is that the fan thermostat is bad. The fan controlling module is also controlled by the ECM. From the factory the turbo Buick came with a fan delay relay that keeps the fan running after the engine is shut off. When an air conditioner fan continues to run even after the unit has been turned off, it is typically due to a malfunctioning contactor relay switch. #4 · Sep 3, 2010. Some common causes include: A malfunctioning idle air control valve (IAC) can. The fuel pump isn't working. If the fan runs longer than a few minutes, you may have low coolant levels, a coolant leak, a faulty cooling fan, a damaged radiator, or an overheated engine. This can be caused by excessive carbon build-up in the combustion chambers or on the piston. This switch is electrically controlled. If it is doing this an abnormal amount, the sensor that is operable with the ignition off may be failing. Our Chevy Cruze is a 2014 with the 1. I am aware of the normal after-run function of the electric fan for the engine's radiator. If your find a circuit blown fuse or tripped breaker, the fan motor might be pulling too much voltage, causing the fault. replace fuse or relay that goes to primary fan.