A radiator fan has an important role of keeping a vehicle's engine cool. 2015 Dodge Challenger R/T 5.7..What temperature should the factory engine cooling fan come on? I think the directions say to place the probe near the outlet on the rad. https://www.wranglerforum.com/f274/how-hot-is-too-hot-3-6l-1839202-3.html, https://www.allpar.com/fix/engines/cooling-system-about.html, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. I cant say for sure if my electric fan came on or if it just cooled on its on once I got leveled off a bit. Fan Stage 2. You also need to run a relay, the temp switch just gounds out what the water is up to temp and activates the relay which in turn starts your fan to spinning. As mentioned the easiest way to alter the fan setting is with a tuner. The worse part is, that any modification to increase the fan's duty cycle may wear out the fan faster. Unlocking the ecm will void your drivetrain warranty. While sitting in backed up traffic, temps based on the digital dash go up to 226. A forum community dedicated to Jeep Wrangler owners and enthusiasts. The electric cooling fan uses a direct current (DC) electric motor with a thermo switch, module or computer control to turn it on or off, depending on coolant temperature or AC operating condition. Disable Temp: Temperature at which the fans will switch off after ignition off; Run Time: Maximum Fan run time after ignition off if Disable Temp … A fan limit switch consists of the following components: An on-off switch for the blower fan. The following video (that I recently watched) about the new Duramax may well be a somewhat unrelated video. A control which turns the blower fan on or off depending on the air temperature within the furnace. I'll watch the temps as I'm 4wheelin. If the red or yellow temperature light comes on, you need to: Pull over as soon as it’s safe to do so. Another reason I'm glad I bought a '14. As long as the AC works I don't care what the coolant temp is. But I have not investigated it. This wire (gray in our kit) supplies the ground signal to trigger the relay. Generally, this happens when the pointer goes beyond the half-way mark. If its not opening right then the coolant won't get to the temp sensor that I imagine triggers the puter to turn the fan on. Actually, 226 is pretty average for the engine in traffic. The switch should be located on the radiator, either the top or … Generally, and within reason, hotter coolant is better. For a better experience, please enable JavaScript in your browser before proceeding. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. I thought the 3.8s had electric fans, but 2-speed, not PWM like the Pentastars? How a Fan Limit Switch Works. This in turn cools the antifreeze and water that's within the radiator, which keeps the vehicle's engine cool as well. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. So I believe JK-Pentastars are 'victims' of the electric fan design and it's programming. 2 Bernese Mtn dogs. You have to be careful when using tuners. Aug 15, 2008 190 0 0. That was too rich for my blood, since that would be all I want the tuner for. They mostly have the pusher fan wired to a switch or a temperature sending unit, kicking the fan on when it gets too warm. The thermostat should be fully open when that temperature is reached. 2014 JKR Granite Crystal, 5.13 Auto: RK X Factor 2.5 Inch Lift, Artec Front and Rear Truss, Artec Rear LCA Mounts/Skids, Poison Spyder HD Crossmember, Rock Hard Gas/TC/Evap/Oil Skids, Rough Country Diff Sliders, Nitto Trail Grapplers 37x12.5x17, Pro Comp 97 Series Wheels, Synergy Weld On Rear Trackbar Bracket, PSC Hydroassist, T6 Aluminum Tie Rod, G2 Gold Chromoly Axle Shaft/RCV front axle shaft, Dynatrac Ball Joints, 1310 driveshafts, Artec Rear Upper CA Mounts, Warn VR8000. thermostat but if you do not turn the fans on earlier than stock settings you are NOT going to be able to keep the temp down below factory fan temp settings unless you are driving fast enough to put enough … I discussed this with a couple of Chrysler A Techs a while ago, which made sense and was another reason I didn't proceed. If your coolant level is low there is a chance that you will get air in the system … You have no problem. On my 1996 ODB2, the engine temperature reaches 230 before the PCM turn the electric fan on. I did it this way as to turn on the fan as soon as possible in a motor warming situation, it seems to do a good job in keeping the temps constant. That’s because there is no air being pushed through the radiator and the outside temperature can be around 90 to 100 degrees. My temps are always right at 210 degrees. When driving, temps stay between 199-209. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. This is during 60 degrees outside temp. Some cars have an electric fan that forces air thru the radiator. But not everyone "agrees" with that "design" and some may prefer running at lower temperatures. You would also see the fan status if you had a fan switch with LEDs (or just fan status LEDs). A temperature sensor within the furnace. I believe you have nothing to worry about. Just remember you can put in a lower temp. It also determines if the furnace should be shut down in the case of overheating. I can't comment about 2017 and above, but my 2016, requires the computer being unlocked along with the purchase of the tuner. What should I do if my cooling fan breaks? I was worried as well when I first bought mine and seen the temperatures it ran. Temperature will often determine the time that a radiator fan starts up. 85 and 86 can be reversed and 30 and 87 can be reversed. When the ENG reaches 238F the Switch closes, completing the Fan Motor circuit to GND. On the Renix machines, the fan switch is located in the cool/cold side of the radiator. I took the fan out and disassembled it. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models! You get a switch that comes on at a specific temperature. Mine runs up to 228 or so in Houston, then backs off pretty rapidly once the fans kick in. Only solution i found is to clean the radiators more often. My bad on the relay location. The engine temperature sender is in the hot side of the engine I am sure one can see a very high engine temperature before the electric fan come on. Another thing to keep in mind is if the fan comes on too soon and doesn't allow the engine to get hot enough, long enough it can cause the engine to form condensation in the oil. The only thing you can tell is whether the engine is overheating. While sitting in backed up traffic, temps based on the digital dash go up to 226. I have a 2017 BTW. I read some where on here that in 4X4 the fan on temp is 205 degrees. They always have a problem for every solution!! Insufficient Coolant. The temperature-controlled switch is designed to turn the fan on when coolant temperatures reach 195 degrees and turn off the fan when temps drop to 185 degrees. You use HPTuners to turn the fan start temp down. Before spending $240 to replace it, I thought I'd just try the "poke it with a stick" method. JavaScript is disabled. A temperature-sensitive switch functions to turn the fan on and off periodically. No locked PCM nonsense and no obsessing about warranties. There is no reason to run the fan if your engine is not up to temp. When the room cools down to some pre-determined "low" point, the thermostat signals the air conditioner to turn off. Just curious if anyone knows the temperature at which the cooling fan turns on and back off. When demand pushes the temp a little warmer, the fan … G. GT Tommy New Member. The temperatures you're seeing are fine, although a little higher than mine. Driving up the canyon yesterday my temps rose to about 220 - 225 ish. That `` design '' and some may prefer running at lower temperatures only solution i is... Off depending on the other spending $ 240 to replace it, i thought the 3.8s had electric,. 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