Cooling Fan. 2 Answers. It should test for continuity when engine cold. I let the car run for about 5 minutes and the temperature gauge never moved. Designated dog and bike hauler. I recommend having your vehicle’s The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the ... fan comes on only if i turn on A/C otherwise wont, (regardless of what is car temperature ) 04/17/2019 by Jawwad Ayub. technicians, Trusted mechanics, rated by thousands of happy car The cooling system thermostat is designed to quickly bring the engine up to operating temperature. I have a 2012 Ford E350, 5.4l v8 that has a temperature gauge that works intermittently. The climate control system might be turning on the A/C (thus the fan comes on) to ensure that the windows don't fog up. Even in the morning when I start the car the fan comes on, what could be the problem? This cycles on and off for about a few minutes. Is your air conditioning turned … andy64 0 Posted July 25, 2010. andy64. Fans Fans are necessary to keep the components under your car’s hood from overheating. How to Fix a Faulty Cooling Fan Module in your Volvo by techplusaadmin November 7, 2018 . 2 Answers. Stays On . Input appreciated. The cooling fan should come on immediately or within the next couple of minutes. If necessary, ask to speak with the service manager. The blower motor resistor is used to... Hi There, When you turn the key to the on position prior to turning the engine over, the AT light may come on for a few seconds as the car is running through a series of system checks. my cooling fan stays on for several minutes after engine is shut off? By continuing to use this site you consent to the use of cookies as described in our cookie policy, unless you have disabled them. Seeing how it is really cold anyway, its probably the first time since summer that the fan has come on, not that Ive noticed. A radiator fan uses its fast spinning blades to draw in outside air. It is what sends the signal for the fan. I drove my car 32 miles, and it should have gotten warm/hot. It turns out that the timing chain cover gasket was also improperly installed. My speed fan comes on as soon as i start the car even with no AC on even when the car is cold i was talking to some guy - Answered by a verified Auto Mechanic . It is not constant on, it runs at high speed (full blast) for about 3 seconds and then off. 09/08/2019 by Luis Lofo. If it is not opening then it will be very easy to overheat the engine. When the blower motor was last replaced, was the blower motor resistor replaced as well ? That’s because there is no air … Its cold out so the fan pulls the coolant temps down pretty rapidly. The cooling fan just stays on. It is not normal for a fairly new car with low miles to have the Check Engine Light come on. This was after many of their buyers experienced the same problems that were then associated with a fault in the cooling fan module. 6 Posts . If the fan no longer runs at cold startup, you have eliminated several problems, do this now. 1991 firebird trans am 5.0 TPI duel fans, one fan turns on when the car is cold, in other words you start the car in the morning at 40 degrees outside the fan is on, turn off the car fan turns off. When the PCM is commanding a fan relay ON, the voltage of the control circuit should be low, near 0 volts. If the engine's RPM is surging while the vehicle is in gear, the issues could be caused by a mass air flow sensor, O2 sensor... Hi there. If a thermostat is completely stuck closed, then it does need to be replaced without driving the vehicle. 07-10-2009, 09:18 AM. Thus, it has an important job. If you are stationary and the pressure rises, the fan will activate to increase the cooling air flow and control the pressure. It seems like the cooling fans are running even though the car isn’t overheating, (it was only about 40 degrees outside) and the a/c obviously wasn’t on. It … 33,960 Report; Hornet_2497 answered 3 years ago On most cars the radiator fan comes on with the A/C, and the A/C comes on when the defrost function is selected. Radiator fan comes on when engine is cold. Until such time as you can either complete your checks of the circuits or take the car to a service facility, pull the fuse in the fuse relay box on the driver's side fenderwell. Monday, August 1st, 2011 AT … @fusebox. Your cooling fan comes on when the car reaches a particular temperature. UK Auto Repair Questions? Swap relays and check if your fan is cycling normally, if so, replace the relay marked with a two. temp is usually about 85 degrees. If the engine's warm when you start it, then the fan might kick in immediately - this is because the coolant heat will be concentrated at the top of the engine - due to lack of pump circulation - which is where the coolant temperature sensor's located. Cooling fan system running non-stop. What could it be? Had a water pump at 29 and then again at 35k miles by a dealer a few hours from me. guides, Check cars for recalls, common issues & maintenance One acts as aholding area while the other directs to the clutch. On older vehicle models, just wait about 15 to 20 minutes for the engine to reach operating temperature. Cause. Yes, it is very possible that a temperature sensor was broken, or a wire was disconnected during the previous repair, or it is possible that the temp sensor is just plain defective. problem: whenever I turned the ignition to on, the cooling fan would come on and stay on untill I turned the car off. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat. Radiator Fan Not Working: Common Causes. Typically on the bottom of the radiator. Ive just completed a 600 mile trip and its still not happy. they'll run for about 8 to 10 seconds, kick off, then startup again about 10 seconds later. That issue was fixed and is good now. If the coolant temperature sensor is damaged or the wiring to it is shorted this will cause the fan to run . This too was fixed, and doesn’t seem to be a problem anymore. Battery positive voltage is supplied to the low speed, high speed, and S/P fan relays. That’s the way its supposed to work, and though the fans should probably stay off longer than 30 secs a) I assume you haven’t actually timed it and b) I don’t know how the CR-V is programmed in that regard. On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor. 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. cooling fan goes off and on when car is completly cold cooling fans go on and off even when engine is dead cold. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Engine Cooling Fan Running at Constant High Speed Brand: Mercedes Models: W204 C Class, W207 and W212 E Class, GLK Class. The clutch assembly for your car’s cooling system is what keeps the radiator fan attached to the engine, ensuring it has the right amount of power to keep propelling. is it safe to drive the truck? After this comes the roar of the fan, designed to give you an enjoyable driving experience. 152 Posts . Thanks. sounds like a bad thermoswitch. I put the relays in and the fans cut on. '03 A4 5-MT Motoza tuned Frankenturbo F21L With full supporting mods. Radiator fan comes on even when engin is cold ... Radiator fan comes on even when engin is cold. I usually start by checking for power at the starter when trying to crank it over. Ive had a look on here and it seems to be that it is trying to do a DPF regen and Im interrupting it, does that sound correct? A radiator fan is thus used to keep the temperature of the coolant in check. Since we’ve owned the car there were two other issues First, the transmission pan gasket wasn’t properly installed and it was leaking transmission fluid. If the fan's kicking in as soon as you start a cold engine, and the air con's turned off, then I'm sure that this is a fault, unfortunately. I JUST replaced the Coolant Temp Sensor 2 weeks back. The fan on my 2001 Forester is coming on even when it’s 10-20F outside. The fan is running as such a high speed you can hear it over the noise of the idling engine. The cooling fan will come on when the engine is cold and it will stay on the entire time the engine is running. If the clutch assembly isn’t working properly, or begins to fail itself, it can cause the fan to stop working. The trigger is the thermostat in the radiator of your vehicle. The same also holds when the engagement takes place slowly, or the fan comes to life as soon as you start the car. I’ve read that the cooling fan will run the whole time when either the A/C is on or the vent control is set to defrost, regardless of whether the engine is cold or hot. I pull the Cooling Fan 3 relay and it all shuts off as well. Keith . Powered by Discourse, best viewed with JavaScript enabled, Cooling fan is always on, even runs when engine is cold. A condenser fan relay operates the fan that removes heat from the engine. 3 . Do you think something could have been broken or incorrectly reinstalled when the technician had to remove the timing chain cover to fix the timing chain cover gasket? Thanks for the information. Also, mark a similar looking relay in your fuse box with a one, and mark your fan relay with a two. It's 38 degrees outside. I tried disconecting the battery for a couple hours and it goes back to running normally, but this start doing it again after driving for a couple weeks. Looks like it is getting a call for switch from somewhere. If any of these components are not functioning properly, it will cause your vehicle to overheat. On previous cars which I have had, the cooling fan has only switched on when needed. Could it be a bad thermostat? Even when engine cold. This forum is great - Im getting answers to all those niggling car problems Ive had for years! Your car fan will run for a few minutes after you turn off the car … This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. The cooling system thermostat is designed to quickly bring the engine up to operating temperature. Login|Contact Us. Hello! Your car fan will run for a few minutes after you turn off the car … If these tactics are to no avail, contact Subaru Customer Service at the corporate level. Please see our. Just purchased the car, 2012 LTZ 6AT w/ 39k miles. Hi guys, Quite often when I switch my car off (2013 Superb 1.6 Greenline) - The cooling fan keeps on running. Something somewhere has gone haywire and I am just trying to locate the problem. EVERYTHING on your car is covered by the Bumper-to-Bumper Warranty (Subaru calls it the “Basic” warranty) for 3 yrs/36k miles, and the engine and transmission are covered for 5 yrs/60k miles by the Powertrain Warranty. During summers in Texas for example, cooling fans turn on very soon if you idle in traffic. I did buy all new relays and install all 3, same exact results. As far as my A/C and heater go, the blower motor just grumbles when I turn either of them on. Symptoms of a Bad or Failing Cooling Fan Relay, How to Buy a Good Quality Cooling/Radiator Fan Motor, Ignition Cable (Spark plug wires) Replacement. So, seems not the relays stuck, etc.. The temp gauge inside the dashboard never left it's "off" position, but when the car is powered on/off it moves slightly. I have a 2011 silverado. Your cooling fan comes on when the car reaches a particular temperature. - chrysler 2005 town & country question The condenser fan (if it has a dedicated fan) or the radiator fan most always comes in (with AC on) when the compressor discharge pressure (or, alternatively, the liquid line one; look for where a sensor or a switch is located on the high pressure line) rises over an operative threshold. Trigger is the thermostat in the radiator cooling thermostat F265 and the forward motion provides air. Information on when the blower motor was last replaced, was the cooling fan to keep the gauge... 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Has a valve thatcontrols the flow of oil between two compartments whenever the A/C is on ; 1 quirks...