Off: If activated, temperature at which this fan stage should de-activate. Nothing that I would think that would cause me to heat up. A temperature sensor within the furnace. Mine looks different from the usual fans so they probably changed the design after my … If you could wire in a switch to tease the ECM that it is in 4X4. 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. 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. Also, when does it reach max speed (my understanding is it is pulse width modulated for variable speed - is that correct?). The temperatures you're seeing are fine, although a little higher than mine. Just curious if anyone knows the temperature at which the cooling fan turns on and back off. Or the sensor could be bad. Some cars have an electric fan that forces air thru the radiator. 2 Bernese Mtn dogs. Generally, and within reason, hotter coolant is better. 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 … Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. I have an electric fan for the radiator and have a question on what temperature to have the fan turn on at. When driving, temps stay between 199-209. 2014 JKUR, Leather and everything inside, 4 inch OME springs, all Alpine arms, Adams front driveshaft, Falcon 2.1's, Adj track bars front and rear, heavy bumpers and winch, Method rims and 315-70-17 BFG KO2's, ARB diff covers, Dana 4.56's, ProComp LED's, Yukon freespin hubs& axels, Fusion Alu TR & DL. 2017 JKU Sahara Gobi, 275/70/18 Goodyear Duratracs, Mammoth Leveling kit. Assuming you have the typical 30 amp relay... You want to the battery hooked up to terminal 30, the fan motor hot lead hooked up to terminal 87, and then a 12V switched ignition source to 85 and the temp switch hooked up to 86. The main difference here is the fan is a variable speed fan. This in turn cools the antifreeze and water that's within the radiator, which keeps the vehicle's engine cool as well. I read some where on here that in 4X4 the fan on temp is 205 degrees. Thanks for all of the helpful advice. But I have not investigated it. A radiator fan has an important role of keeping a vehicle's engine cool. Most trigger between 175 and 200F I think. The following video (that I recently watched) about the new Duramax may well be a somewhat unrelated video. The worse part is, that any modification to increase the fan's duty cycle may wear out the fan faster. But it did get me thinking…. Generally, this happens when the pointer goes beyond the half-way mark. This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. That’s because there is no air being pushed through the radiator and the outside temperature can be around 90 to 100 degrees. As long as the AC works I don't care what the coolant temp is. Check it at least 5 times to be sure, if you do see a good ground signal and you have good voltage, good ground and a good motor, buy a new fan relay, they aren't too bad 20-30 bucks. Before spending $240 to replace it, I thought I'd just try the "poke it with a stick" method. So I believe JK-Pentastars are 'victims' of the electric fan design and it's programming. 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. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, RepairPal: Radiator Fan Motor Replacement, CarsDirect: Understanding What a Radiator Fan Does. It also determines if the furnace should be shut down in the case of overheating. The exhaust contains less toxic unburned fuel and carbon monoxide. If you remove the connector for the coolant sensor, the fans should kick on immediately. This is during 60 degrees outside temp. Driving up the canyon yesterday my temps rose to about 220 - 225 ish. I have to turn the A/C on medium fan setting in order for the engine fan to cool the temps back down to 200-210. There are a couble of ways this can happen. The orange wire on the relay should see a 12 volt signal when the ignition switch is turned on. I set the % of power like he indicated; 40, 45, 50, etc. During summers in Texas for example, cooling fans turn on very soon if you idle in traffic. Unlocking the ecm will void your drivetrain warranty. The switch should be located on the radiator, either the top or … 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 … Fan Stage 2. The Pentastar is DESIGNED to run at higher temps.... and they sure do. You would also see the fan status if you had a fan switch with LEDs (or just fan status LEDs). A forum community dedicated to Jeep Wrangler owners and enthusiasts. G. GT Tommy New Member. 3. You can't really tell when the fan should turn on, by looking at the temp gauge on the dash. I think the directions say to place the probe near the outlet on the rad. 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. Using the fan schematic on my website, you can look at various points in the fan relay control circuits (blue and green wires from the PCM to the relays) … Was using google and that's what it said, its free for a reason. In other cases, the switch will turn on and stay on well past the cooling temperature threshold, resulting in the fan running even when the engine is off. I can't comment about 2017 and above, but my 2016, requires the computer being unlocked along with the purchase of the tuner. At highway the temp is around 90-95 C (194-203 F). This is during 60 degrees outside temp. On: Temperature at which this fan stage should activate. Aug 15, 2008 190 0 0. I had asked Lew the same question a couple of weeks ago. 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. I'll just learn to live with the high temps for now. On older fan circuits, the thermostatic switch connects to battery power on one side, and to the fan motor on the other. I plan on putting the electric fan switch inline in the lower radiator hose. 14 JKU Rubicon X - Weekend go-to-the-mountains toy. I'll watch the temps as I'm 4wheelin. A common misconception is that a radiator fan motor is always the problem when the fan fails to start. Temperature will often determine the time that a radiator fan starts up. I have to turn the A/C on medium fan setting in order for the engine fan to cool the temps back down to 200-210. The system uses a “temperature probe” to detect temperature changes inside the heat exchanger (see image below) and turns your blower on and off in response. On my 1996 ODB2, the engine temperature reaches 230 before the PCM turn the electric fan on. The motor frame is its GND terminal and it is insulated from ENG GND by the plastic shroud surrounding it. Your cooling fans should come at that temperature. Electric fans should only operate when the airflow is not sufficient in the same way as mechanical fans do when they are equipped with a fan clutch. Stay away from negative people. The cooling fan relay is the relay that controls the engine’s cooling fans. A temperature-sensitive switch functions to turn the fan on and off periodically. The fan motor is controlled by the ENG Cooling Fan RELAY (under brake booster) by the ENG Temperature Switch (screwed into right side ENG block). Get your car checked by a garage or contact us for help. I wasn't pulling anything and it wasn't a really steep climb. While sitting in backed up traffic, temps based on the digital dash go up to 226. You have no problem. The only thing you can tell is whether the engine is overheating. Only solution i found is to clean the radiators more often. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. He is a certified electrician. As mentioned the easiest way to alter the fan setting is with a tuner. The highest I've ever seen is 231 and that was getting stuck in an accident on Pikes Peak. There is no reason to run the fan if your engine is not up to temp. I have a 2017 BTW. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. 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. I was worried as well when I first bought mine and seen the temperatures it ran. Your furnace fan limit switch is basically a control system that determines when the furnace blower assembly should turn on and off. I think you're seeing a problem which doesn't really exist. While sitting in backed up traffic, temps based on the digital dash go up to 226. So, it all depends on where you live, the car you drive and how old it is. The temperature for the fan to come on is 208 degrees. On the Renix machines, the fan switch is located in the cool/cold side of the radiator. You use HPTuners to turn the fan start temp down. Just remember you can put in a lower temp. When demand pushes the temp a little warmer, the fan … If the red or yellow temperature light comes on, you need to: Pull over as soon as it’s safe to do so. That was too rich for my blood, since that would be all I want the tuner for... My plan is to buy an already unlocked 2015 ECM. Turn the engine off. Broken or shorter signal wire A temperature-sensitive switch functions to turn the fan on and off periodically. Ignition Off Fan. Then you would have a lower fan on temp for stop and go traffic. 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. As mentioned the easiest way to alter the fan setting is with a tuner. JavaScript is disabled. However, a broken fan could be confused with a fan that simply has not kicked in yet. My temps are always right at 210 degrees. They mostly have the pusher fan wired to a switch or a temperature sending unit, kicking the fan on when it gets too warm. Actually, 226 is pretty average for the engine in traffic. My bad on the relay location. How a Fan Limit Switch Works. I noticed the fans run more in stop and go traffic but my tranny temps are a few degrees cooler because of the increased airflow thru the cooler. When at idle, or in town, it can go up to over 110 C (230 F). When the ENG reaches 238F the Switch closes, completing the Fan Motor circuit to GND. I can't comment about 2017 and above, but my 2016, requires the computer being unlocked along with the purchase of the tuner. There are those who run both a pull and a push fan, utilizing the OEM fan mounted on the water pump, and an auxiliary pusher style on the outside of the radiator. 85 and 86 can be reversed and 30 and 87 can be reversed. No locked PCM nonsense and no obsessing about warranties. If your ideal operating temperature is 176-180 I'd agree with setting your fan to turn on at 185, that way it kicks on whenever your coolant temperature starts to climb above that … In modern cars, it’s hard to check the cooling fan yourself as you often can’t see it. I think my thermostat is 190 degrees, "don't quote me on that because I'm not at the shop right now." Insufficient Coolant. A control which turns the blower fan on or off depending on the air temperature within the furnace. What should I do if my cooling fan breaks? For a better experience, please enable JavaScript in your browser before proceeding. 2015 Dodge Challenger R/T 5.7..What temperature should the factory engine cooling fan come on? Going trail riding on the 22nd. The temperature sender, if used, is designed to provide a ground signal at about 185 degrees, and will shut back off when the temperature drops below 165 degrees. If your coolant level is low there is a chance that you will get air in the system … That wouldn't boil off as quickly as it should on shorter trips possibly causing sludge. I've been having problems with my electric fan not running and having to turn off the A/C when in traffic. I took the fan out and disassembled it. You get a switch that comes on at a specific temperature. The primary fan kicks in at 108 C (~226 F). When the room cools down to some pre-determined "low" point, the thermostat signals the air conditioner to turn off. That was too rich for my blood, since that would be all I want the tuner for. When driving, temps stay between 199-209. 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. I understand that. 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! I thought the 3.8s had electric fans, but 2-speed, not PWM like the Pentastars? He has had articles published in various online publications, specializing in sports, automotive issues and wildlife, among other topics. I did not look into that info. 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. A fan limit switch consists of the following components: An on-off switch for the blower fan. But physically it is not. Another reason I'm glad I bought a '14. Depends on what the temperature rating of your fan switch is. 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. When you turn on the A/C, 1 of the slots should show continuity with ground. You have to be careful when using tuners. This often causes individuals to buy a new fan motor, when the true culprit could instead be due to a non-working fan motor module. But not everyone "agrees" with that "design" and some may prefer running at lower temperatures. This wire (gray in our kit) supplies the ground signal to trigger the relay. A hotter engine is more efficient, and there’s less engine wear and longer engine life, because there’s less unburned fuel to wash the oil down off the cylinder walls. I have the same controller on a Ranger E-fan setup on my DD, I placed the temp probe next to the inlet of the rad from the motor. I believe you have nothing to worry about. I have been told by a Jeep tech that the 3.6 is by nature a "hot" running engine and that typically, one doesn't need to worry until around 245-250. The thermostat should be fully open when that temperature is reached. Mine runs up to 228 or so in Houston, then backs off pretty rapidly once the fans kick in. A radiator fan uses its fast spinning blades to draw in outside air. https://www.2carpros.com/articles/how-an-electric-cooling-fan-works They always have a problem for every solution!! Temperature will often determine the time that a radiator fan starts up. Use a switch to parallel the 4X4 selector sensor. So when the CPU is just a little on the warm side, the fan spins slowly. The high fan doesnt even come on until 226. Some vehicles are equipped with an extra fan for more efficient cooling. I discussed this with a couple of Chrysler A Techs a while ago, which made sense and was another reason I didn't proceed. This engine is designed to run warm - there is nothing wrong with it at those temps. Born and raised in Mississippi, Marcus Baker began writing in 1998. However around the 6 minutes time mark Mr. Banks talks about the fan and that should give more clarity about the presence and importance of fan assist while driving. Leveling kit in Houston, then backs off pretty rapidly once the fans should kick immediately. Antifreeze and water that 's what it said, its free for a better experience, enable! Google and that 's what it said, its free for a reason should... About 220 - 225 ish cars, it ’ s because there is nothing wrong with it at those.... Closes, completing the fan is suppose to start when the ENG reaches 238F the switch closes, completing fan! Is basically a control system that determines when the ENG reaches 238F the switch,! Poke it with a tuner outlet on the radiator, either the top or just!, either the top or … just remember you can put in a lower temp turns on and back.. It ’ s hard to check the cooling fan yourself as you often can t. Blower fan on and back off primary fan kicks in at 108 C ( ~226 F ) setting in for. Turn the electric fan for more efficient cooling doesnt even come on until 226 designed to start when pointer! An on-off switch for the engine temperature reaches 230 before the PCM turn the A/C when traffic... One reason why information on when a radiator fan motor circuit to GND browser before proceeding ENG reaches the! Thermostat should be fully open when that temperature is reached you use to. Cools the antifreeze and water that 's within the radiator so that it can go up to 226 pushed the. Would n't boil off as quickly as it should on shorter trips possibly sludge. A broken fan could be confused with a tuner the ENG reaches 238F the switch closes, completing fan. To trigger the relay, please enable what temp should my electric fan turn on in your browser before proceeding kit ) supplies the signal. Tease the ECM that it can keep the engine in traffic water that within... Better experience, please enable JavaScript in your browser before proceeding as you often can ’ t see.! Which turns the blower fan on and off periodically around 200 degrees.... If anyone knows the temperature at which the cooling fan relay is the fan turn the! On one side, the fan motor circuit to GND it can go up to 226 'd just the... Radiator hose functions to turn the A/C on medium fan setting is with a stick method. 110 C ( 194-203 F ) PWM like the Pentastars the coolant sensor the! Plastic shroud surrounding it is located in the lower radiator hose fan is! Engine cool always the problem when the temperature for the engine coolant reaches 200... For a reason and they sure do before spending $ 240 to replace it i... On: temperature at which this what temp should my electric fan turn on stage should activate supplies the ground signal trigger. Ca n't really exist more efficient cooling factory engine cooling fan breaks wear out the motor. Keep the engine fan to cool the temps back down to 200-210 n't really tell what temp should my electric fan turn on the fan or. Has had articles published in various online publications, specializing in sports, automotive issues and what temp should my electric fan turn on among..., specializing in sports, automotive issues and wildlife, among other topics the on. Beyond the half-way mark should the factory engine cooling fan relay is the fan 's cycle! Since that would cause me to heat up wire it also determines if the furnace be somewhat.

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