2009 silverado, Temp gauge at 160, Fan on at all times. Getting engne hot,a/c turned off on dash readout. 5.3 lt engine Chevy Silverado … read more. The cooling fans won't kick on and will overheat fast. The cooling fans won't kick on and will overheat fast … read more.Yes, actually it did. When the sensor fails, the radiator fan runs at full speed like the car is overheating. When you shut off the car, the fan continues to run at full speed for at least 15 minutes. It drains the battery. You drain your battery completely dead too many times and you need to replace it.2015 silverado 5.3 coolant temp sensor keeps going out. As the title says. Last week my coolant temp sensor went out, replaced it, next day I made about 9 miles before I watched the gauge bottom out, when that happens the cooling fans kick on full tilt. I replaced the sensor again with another OEM one and the next day it went out again.My wife's 2017 Equinox was behaving the same way: cooling fan on high for several minutes after she shut off the engine, no A/C on the way home, Temp gauge pointing to cold side. the Equinox is a 2.4L LT edition. After the engine cooled down (45 minutes), I checked the coolant level and the bottle was full. there were not drips under …Good morning my name is***** have a 2018 Chevy Silverado 5.3 L temperature gauge is on 160 fans turn on and stay on I replaced the temperature sensor thermostat works properly Mechanic's Assistant: I understand that youre experiencing an issue with your 2018 Chevy Silverados temperature gauge and fans staying on, and I …2008 chevy silverado 1500 4X4 this morning display came on engine hot shut a/c down temp gauge stays on 160 and does not move. both cooling fans running. anti freeze is at correct level and motor is n … read more The first step is to find and replace any faulty parts, such as the thermostat or cooling fan. If these parts are malfunctioning, it can be difficult to accurately measure the temperature of the automobile’s engine. Once any faulty parts have been replaced, it is important to test the performance of the temperature gauge in order to make sure ... To put some distinction between the two, here are the nine most common ways how to know if a temp gauge is bad: Erroneous temp gauge readings. Extreme polarities. Illuminated Check Engine Light. Increased fuel consumption. Starting issues. Non-working cooling fans. Engine overheating. Black smoke.In today’s competitive job market, finding employment can be a challenging task. Whether you are a recent graduate, a career changer, or someone looking for temporary work, it can ... At the very least, the thermostat should be changed since it really isn't an expensive or intensive repair. Was this done while you were at the mechanic? This would certainly solve the temp gauge and engine temp. I don't believe (not 100% sure) this issue would affect the operation of the AC (it would with the heat). Nov 27, 2020 · Noticed the temp gage wasn't working. Pulled over to check and found cooling fans running on high. also noticed when I drove back home the AFM not working. Cooling fans would not shut off when engine was shut off. You tubed and seemed temp sensor may be culprit. Replaced temp sensor but did not fix problem. also removed negative battery cable ... The fact that the fans are always on could be caused by a missing ECT value. If the PCM is not able to determine the coolant temperature, it will activate the fans at all time to make sure the engine will not overheat. Ask Your Own Chevy Question. Chevy Mechanic: Frank@AutoPro.#1 · Sep 25, 2022. I have a 2018 Silverado 1500 5.3L. The cooling fans just recently started staying on after I shut off the engine. The temperature gauge stays around 165 …I have a 2014 Chev Silverado 1500 LTZ Z71 w/ 5.3L engine, w/ 140K miles on it. ... by swapping it with my work truck MAF; nothing changed. - Checked ECM relay - Checked J-Case fuses for cooling fan 1 & 2 ... decided to “risk” it and drive it anyway with the fans running wide open. Once I got a few miles down the road, the temp gauge …350 posts · Joined 2016. #15 · May 30, 2018. GM, Mazda, and others use a dummy with a wide range, 40-60 degrees, as a single temp. It's either cold, normal, or overheated. Oil temp is also calculated in certain ranges on Camaros as there's a big difference between that and aftermarket after adding a big cooler.Apr 28, 2022 · Noticed the gauge went dead, then cooling fans kicked in. Turned truck off fans continued for about 3-5 min. Replaced sensor with chevy part, it worked fine for about 2 weeks, not back again. Also noticed AC stopped cooling at the same time. No low coolant, no running hot. Gauge went dead or appears to not be registering again this AM. Radiator fans keep running. Have a 2014 Chevy Silverado 1500. Radiator fans will kick on and keep running during cold weather and stay on five minutes after I turn off the truck (Gauge also stays stuck). I found a solution to the problem by disconnecting my battery and reconnecting it and reset back to normal but only for maybe a week or 2 not ...Apr 4, 2021 · 2016 5.3 thermostat and temperature sensor. Any help guys, my radiator fans stay on high full blast as soon as i turn the truck on and even after i shut it off. Temperature gauge stays at 160 and doesnt move at all during a 40 minute drive. A/c doesnt blow cold air either. Any suggestions? 2016 5.3 6-speed with 52k miles. Dec 6, 2010 · cooling fan will not come on until about 230 degrees, if fans still do not work. check the fuses and relay. if ok then run a wire to fan from battery.on fan side connection, run a wire from battery positive to fan connection. run a wire from negative to ground connection.if fan will not come on it is either bad or the coolant temp, sensor is ... I have a '17 Colorado V6 Ext Cab WT. (dont even get me started on the tranny issues) So my temp gauge issues started a few months back - while driving , the temp gauge just drops to the bottom and the AC stops blowing cold. When I turn the truck off, the fan continues to run. I disconnected the battery so the fan wouldn't kill the battery.I have a 2016 Colorado 3.6 with 231,200 miles on it. A week ago my radiator fan started coming on as soon as I started the truck and would stay on while driving. Temperature never got over 160. When I shut the engine off the fan would stay on for about 5 minutes and then shut off.My wife's 2017 Equinox was behaving the same way: cooling fan on high for several minutes after she shut off the engine, no A/C on the way home, Temp gauge pointing to cold side. the Equinox is a 2.4L LT edition. After the engine cooled down (45 minutes), I checked the coolant level and the bottle was full. there were not drips under …No cold air trough the AC. Temp gauge needle bottom cold. Scanner results: -DTC P0128. -Engine coolant temperature while driving172.5 - 179.6 f. Parts ordered: - Engine Coolant Thermostat and Housing Assembly (12678784). - Engine Coolant Outlet O-Ring - GM (12649985) Tools needed:temp gage not working, cooling fans stay on high even when truck is shut off, v4 not kicking in on a 2014 sierra 5.3. replaced temp sensor but. JOHN aka Eauto. self employed. High School or GED. 25,782 satisfied customers.I have a 2016 Colorado 3.6 with 231,200 miles on it. A week ago my radiator fan started coming on as soon as I started the truck and would stay on while driving. Temperature never got over 160. When I shut the engine off the fan would stay on for about 5 minutes and then shut off.When you have a low temperature gauge reading, it is possible that your cooling system has an issue. It could be due to a low coolant level, faulty gauge, temperature sending unit issue, or the thermostat is stuck open. In case the gauge is reading high, you may have a problem with your radiator and reservoir tank.ADMIN MOD. 2014 Silverado Radiator Fans Blow at Max Speed and No AC. A few weeks ago I noticed my truck was pretty loud at idle. I start my truck and the radiator fans start out normal but ramp up pretty fast. Sounds like they are blowing as hard as they can no matter what temp the engine actually is. My dash temp gauge has worked the entire ...When I start the car the temp gauge immediately (or within ~20 sec) is up at the mid-range, where it's suppose to be, and the engine cooling fans come on high speed. The fans continue running at high speed for the entire time I'm driving, regardless of the condition (highway 70 mph, city 30-45, or community 25 mph). When I shut the car off …277 posts · Joined 2012. #6 · Nov 12, 2014. agree with drunken elvis and speed freak suspect the engine coolant temp sensor may it failed or wires cut or plug damaged the default of unreading signal from ect is to run electrical fans continuously by ecm. chevy malibu 98 3.1 l. range rover 98 autobiography.This would certainly solve the temp gauge and engine temp. I don't believe (not 100% sure) this issue would affect the operation of the AC (it would with the heat). ... 06 Pontiac Torrent 3.8L V-6 temp gauge stopped working and cooling fans started running constantly when engine is running. 2. ... What can cause high coolant temp and check ...Another possible cause of a car temperature gauge reading high is a clogged radiator. Like a bad water pump, a clogged radiator will result in an engine that will heat up when idling, but cool off when the vehicle is moving at speed. Your radiator may be clogged if it’s old and rusty. It can also become clogged if you are using old or poor ...Mar 22, 2023 · No. Not in this case. The wiring caused a power surge and killed the sensor. Again, no. One post even replaced the car’s computer ($$$) and still did not solve the problem. Loose connectors. I can’t say 100% no, but my mechanic did check the sensor’s connector. Solution: This works but is not really a solution, but a work around. 2014 silverado has engine fans running after truck turned off, I've replaced thermostat and temp sensor and fans still running and temp gauge is not moving past 160 ... I'm working on a 2002 venture van. My temp gauge only works when I reset the cel, ...The first thing you should check is your fan relay. A defective fan relay may be the culprit. The role of the fan relay is to function as a switch that activates or …Radiator Fan Won't Turn Off and Temperature Stuck at 160 Degrees: 2014 - 2019 Silverado & Sierra: Bad ThermostatIn the video Sean also goes over why the radi...A tstat failure forced the car to go into a recovery mode where the fans stay on at full blast and the temp gauge pegs to zero. I don’t know why gm made it such that it overrides the temp gauge but the tstat is likely your problem. Very common c7 failure. it is indeed dumb that the temp gauge gets blanked out essentially.2014 silverado has engine fans running after truck turned off, I've replaced thermostat and temp sensor and fans still running and temp gauge is not moving past 160 ... I'm working on a 2002 venture van. My temp gauge only works when I reset the cel, ...Cooling fans staying on after shutting engine off. I have a 2018 Silverado 1500 5.3L. The cooling fans just recently started staying on after I shut off the engine. The temperature gauge stays around 165 degrees, even while driving. The A/C also started blowing warm air. I don't see any coolant leaks and I replaced the coolant temperature sensor.Feb 10, 2021 ... Here I show you how to diagnose and test why your radiator or cooling fan is not coming on in your car. There's a number of reasons your ...My 2015 GMC Sierra 1500’s radiator fan is running full blast non-stop. It started doing this all of a sudden, runs full blast idling, going down the road, and for 5ish mins after the truck is turned off. I have coolant and the radiator doesn’t have any visible exterior gunk on it. My engine temp gauge either isn’t reading, or the fan is ...Sep 25, 2022 · Cooling fans staying on after shutting engine off. I have a 2018 Silverado 1500 5.3L. The cooling fans just recently started staying on after I shut off the engine. The temperature gauge stays around 165 degrees, even while driving. The A/C also started blowing warm air. I don't see any coolant leaks and I replaced the coolant temperature sensor. Nov 29, 2018 · Have a helper in the cab watch the gauge. If it does not then check to see if you have any blown fuses. 12 volts comes into the temp gauge and goes thru it to the sensor. The sensors resistance determines where the gauge should read depending on temp. 2002 Silverado LS Ext cab long bed 5.3L 4x4 Z71. Lerch98 and RayVoy. A bad temperature sending unit (the second most common reason) A problem in the temperature gauge's electrical circuit. A fault in the control circuit from the car's computer (depending on vehicle model) A bad temperature gauge. Any of these conditions may cause the temperature gauge to: Read low. Read high.I have a 2014 gmc sierra 5.3l slt that has the cooling fans staying on most of the time with the temperature gauge not registering and the ac not working. I have replaced the etc sensor twice and the fans stay on 80% of the time, the other 20% it works just fine and the engine light goes off after about 30miles. code po128Engine hot A/C turned off. Out of the blue driving to work, my 2010 2500HD tells me 'ENGINE HOT, A/C TURNED OFF'. The water temp gauge is stuck at the lowest reading as if it's not working. I checked under the hood and the engine isn't any hotter than normal. Driving home from work, same issue but then the engine warning light came on!2016 chevy silverado change thermostat and temperature coolant sensor gauge not working and coolant fan stays on - Answered by a verified Chevy Mechanic ... I have a 2016 Chevy Silverado 1500 with the 5.3 my fans just started running really high and the coolant gauge went all the way ... Good morning my name is***** have a 2018 …7 Reasons Why Your Car Temperature Gauge Stays on Cold. The most common reason why your car’s temperature gauge stays on cold is a faulty coolant temperature sensor. It can also be caused by bad wiring between the cluster and the sensor. In some cases, it can also be a stuck thermostat causing the engine not to heat …Mar 16, 2022 · Replace it with battery disconnected, reconnect and see what happens. If that does not work, there is a separate pressure switch on the high side a/c line that forces the fans to run anytime the a/c is on high. Make sure the connections are tight. Its not a replicable item unless you 1st void the system of freon, replace then fill it back up. Do the following: Step 1 - Turn your ignition switch to the off position, wait for about 10 seconds. Step 2 - Turn the ignition switch to the on position, wait for 15 seconds and start your Silverado. Your gauges should now be working fine. You might also need to check the fuses and change any that are faulty.Mar 8, 2022 ... ... not allowing the truck to get to its operating temp. ... FIX CODE P0118 P0119 COOLANT TEMPERATURE SENSOR ... 2014 Chevy Silverado electrical issues ...2009 silverado, Temp gauge at 160, Fan on at all times. ... 2008 Chevy Silverado 2500 HD work truck 6.0. Dash says engine hot a/c turn off also temp gauge not working. Engine not hot. ... inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent. Tory Johnson, GMA Workplace Contributor, discusses …Are you currently on the hunt for a new job? Perhaps you’re looking for temporary employment to bridge the gap between jobs or gain valuable experience. In either case, working wit...4. Climate control panel not working. With time, especially when your truck hits the 100K mileage, certain issues often start to creep in. One of them is a faulty climate control panel. The first sign that your climate control panel is not working is when there are no lights on the knobs or controls. If this is the case, check the fuse box first.The fans will automatically shut OFF after 3 min. regardless of coolant temperature. The PCM commands the high speed fans ON under the following conditions: 1. Engine coolant temperature exceeds approximately 104.25°C (220°F). 2. A/C refrigerant pressure exceeds approximately 1824 kPa (265 psi). 3. When certain DTCs set.Nov 27, 2020 · Noticed the temp gage wasn't working. Pulled over to check and found cooling fans running on high. also noticed when I drove back home the AFM not working. Cooling fans would not shut off when engine was shut off. You tubed and seemed temp sensor may be culprit. Replaced temp sensor but did not fix problem. also removed negative battery cable ... In today’s digital age, the power of connection has never been more evident. As creators strive to share their work and fans yearn for an intimate connection with their favorite ar...Coolant temp sensor replacement Thermostat & Coolant temperature sensor replacement: Yukon, Tahoe, Sierra, Silverado, Escalade GMhttps://youtu.be/7mJF5LQ3oPs...In today’s competitive job market, having a well-crafted resume is essential for standing out from the crowd. One crucial aspect of any resume is the work experience section, which...Dec 10, 2021 · If I were to do it again I would use a 1/4" short 10mm socket on a wobble extension. Other than that it was pretty easy. I am 73 now and work slower than I used to and it took me about 45 minutes. You will lose about a 1/2 quart of coolant even if you pinch off the hose like he does in the video. 2014 Chevy 1500 Silverado V6 radiator cooling fan keeps coming on. I already replace the temperature control, it quit for 2 weeks and now comes back on periodically. What say you to fix this situation … read more7004 posts · Joined 2008. #3 · Mar 14, 2015. one fan turning on/off is perfectly normal. but it is a bit odd that it would go above 210 at all. if you turn on the a/c, that should automatically set the fans to the max fan speed. if the a/c is off, then it should depend on the temp of the coolant. next thing i would check is the thermostat if ...A bad temperature sending unit (the second most common reason) A problem in the temperature gauge's electrical circuit. A fault in the control circuit from the car's computer (depending on vehicle model) A bad temperature gauge. Any of these conditions may cause the temperature gauge to: Read low. Read high.If you have something like torque or a scanner, check for codes or read the ECM temperature output. In my case there was a p0128 that wouldn't set a CEL as well as the ECM recognizing operating temps around 160 degrees. 2019 Z71 CCLB Pacific Blue Metallic. Other/former rides: 84 corvette (101k miles), 04 trailblazer LS (220k miles and …The temperature gauge in the cluster would not move, and the radiator fans are running on high. Made three - four stops and it came up every time after a few mins of driving. Was not hot . . the engine oil was around 163 degrees . . I still am on GMPP warranty . . concerned that without a SES code it will be like chasing a ghost.Do the following: Step 1 - Turn your ignition switch to the off position, wait for about 10 seconds. Step 2 - Turn the ignition switch to the on position, wait for 15 seconds and start your Silverado. Your gauges should now be working fine. You might also need to check the fuses and change any that are faulty.The temp gauge on the…. 2011 Chevy silverado with the 4.8l. The temp gauge on the clusters shows at the 210 mark when its only reading 185 on the scanner. Once it gets up to 217 it will slowly go up in the middle of 1/2 and 3/4 mark the temp on the scanner shows 226 before the fans come on. After the fans come on the temp will drop …#1 · Nov 12, 2023 (Edited) 2014 Silverado 1500 5.3. Temperature gauge quit working and fans running after shut off. No other malfunctions that I can see. Changed the sensor …Welcome back to the channel! In this video Sean goes over why the radiator fan won't turn off on your 2014 - 2019 Chevy Silverado or GMC Sierra. Thermostat...My 2014 Silverado had no reading on temp gauge, fan running high and continuing to run after turned off. Took it to car wash/oil change place, told them the problem. Guy said he had that before. He took off one battery cable, waited 5 minutes (to give it plenty of time to re-set) and re-attached. Problem solved...at least for now.stephan. That wire that's on the temp sensor between the #1 & #3 spark plugs... Pull that wire off, leave it unhooked & turn on the key. The guage should stay to the left. Now with the key still on, momentairly ground that wire to the engine. Your guage should peg out.If your temperature gauge is not working and your fan is running, it could be a sign that your engine is overheating. If you think your engine is overheating, turn off the engine and let it cool down. Once the engine has cooled, check the radiator to see if there is enough coolant. If the radiator is empty, add more coolant.No cold air trough the AC. Temp gauge needle bottom cold. Scanner results: -DTC P0128. -Engine coolant temperature while driving172.5 - 179.6 f. Parts ordered: - Engine Coolant Thermostat and Housing Assembly (12678784). - Engine Coolant Outlet O-Ring - GM (12649985) Tools needed:No. Not in this case. The wiring caused a power surge and killed the sensor. Again, no. One post even replaced the car’s computer ($$$) and still did not solve the problem. Loose connectors. I can’t say 100% no, but my mechanic did check the sensor’s connector. Solution: This works but is not really a solution, but a work around.Wiring. The first thing that you would want to do is locate the fuse for your Silverado’s radiator fan and make sure that it hasn’t blown. If it is blown, replacing the fuse will only solve the problem for a very limited period of time. Unless the wiring issue is fixed, the fuse will blow again.Feb 10, 2021 ... Here I show you how to diagnose and test why your radiator or cooling fan is not coming on in your car. There's a number of reasons your ...Nov 13, 2020 · 2014. The most common problem with the cooling fan in a 2014 Chevy Silverado is that the fan stops working. When this happens Your radiator may not get adequate airflow and that can lead to higher than expected temperatures in it. That decreases the overall cooling capacity of the system and that can lead to Your engine overheating. 1 post · Joined 2021. #10 · Apr 17, 2021. Temp sensor was replaced on my 2015 Traverse LT. Noticed the temp guage would dip, a/c blowing warm air, and fan was running loudly to cool. Finally, check engine light came on. Everything back to normal, will check back if I have any issues. Oil Change Store fixed for $200.00.May 14, 2017 ... Comments233 · How to tell if you have bad engine coolant temperature sensor · Silverado Radiator Fan Won't Turn Off! · How To Test a Relay...Could be the thermostat is stuck or the ECTS is not working. The ECM is not reading any valid temperature. The fan keep running after switching off is a safety measure when the ECM cannot read the temperature it will keep the fan blowing for 10 to 15 mins after you switch off to make sure the car is not in a situation where it can cause …My 2014 Silverado had no reading on temp gauge, fan running high and continuing to run after turned off. Took it to car wash/oil change place, told them the problem. Guy said he … ADMIN MOD. 2014 Silverado Radiator Fans Blow at Max Speed and No AC. A few weeks ago I noticed my truck was pretty loud at idle. I start my truck and the radiator fans start out normal but ramp up pretty fast. Sounds like they are blowing as hard as they can no matter what temp the engine actually is. My dash temp gauge has worked the entire ... Worked for a few days then failed. When the temp shows "cold" the AC will not cycle on; that's normal. The issue is in the temp sensor circuit. The fans running is because the ecm does not see a temp sensor so it assumes a hot condition. If battery disconnect solves the problem it is resetting the ecm (engine control module; i.e. …
Apr 28, 2022 · Noticed the gauge went dead, then cooling fans kicked in. Turned truck off fans continued for about 3-5 min. Replaced sensor with chevy part, it worked fine for about 2 weeks, not back again. Also noticed AC stopped cooling at the same time. No low coolant, no running hot. Gauge went dead or appears to not be registering again this AM. . Kenneth spa
Jan 13, 2020 · I have a 2013 Chevy Malibu 2.5 Lt. recently after an oiled change, the fan is running at full speed as soon as I start the car and a message appears on the dash the reads something like ac is turned of to avoid engine overheat. The fans stay in at full speed for a bout 2 mins s after I turn off the car. Also the temperature gauge stays stuck on ... 5. If a normal temperature can ge reached, the new engine coolant thermostat appears to be leaking and defective. Ask Your Own Chevy Question. When the fans are on the gauge doesn't move from the bottom. But when the fans stop the gauge temp records a normal temp of about 240. Chevy Mechanic: jim.8540 posts · Joined 2015. #4 · Nov 17, 2023. Anyway, other's have reported replacing the thermostat has solved the problem, I would look at the wiring and connector to the coolant sensor first. 2004 Sierra 3500 dually, 6.0L extended cab, cab&chassis flatbed, upgraded to 4wd. 2012 Silverado 3500 dually, 6.0l, crew cab, long box replaced w flatbed.2014 Silverado Radiator Fans Blow at Max Speed and No AC. A few weeks ago I noticed my truck was pretty loud at idle. I start my truck and the radiator fans start out normal but …Dec 10, 2021 · If I were to do it again I would use a 1/4" short 10mm socket on a wobble extension. Other than that it was pretty easy. I am 73 now and work slower than I used to and it took me about 45 minutes. You will lose about a 1/2 quart of coolant even if you pinch off the hose like he does in the video. The fact that the fans are always on could be caused by a missing ECT value. If the PCM is not able to determine the coolant temperature, it will activate the fans at all time to make sure the engine will not overheat. Ask Your Own Chevy Question. Chevy Mechanic: [email protected] sure what thread this is so at risk of repeating myself. I hooked scanner to it today, Coolant temp was normal. Then all of a sudden the temp gauge stops working and the coolant temp reads -40 on the scanner. (on a 90 degree day) IF the coolant temp sensor is working (its new) then the signal from the sensor is having problems at the ...Mar 8, 2022 ... ... not allowing the truck to get to its operating temp. ... FIX CODE P0118 P0119 COOLANT TEMPERATURE SENSOR ... 2014 Chevy Silverado electrical issues ...That's not what's happening. If it stops reporting the temp, then it goes into fail-safe mode and sends the needle to C and disables the AC. It should also turn both fans on High, but that's hard to tell unless your window is down or the hood is up. On the 3.6L V6, the ECT is right on top and easy to find and replace.2014 and newer chevy silverado 5.3L. The radiator fan stays on when the engine is off. Fan runs faster than normal and run when engine is cold. Replace the t...Mar 8, 2022 ... ... not allowing the truck to get to its operating temp. ... FIX CODE P0118 P0119 COOLANT TEMPERATURE SENSOR ... 2014 Chevy Silverado electrical issues ...One of those may be broken and contacting body somewhere and allowing the fans to be stuck on. If you're wiggling harnesses/wires and other electrical functions are "working" or "not working" there must be some underlying issues. My Build Log: silentbravo's 2001 GMC Sierra 2500HD. 2003 GMC Sierra RCLB. My YouTube Channel.2014 Silverado 1500 5.3. Temperature gauge quit working and fans running after shut off. No other malfunctions that I can see. Changed the sensor out, added coolant. Check engine light is on (constant) and temp gauge still not reading. Took it to have codes cleared but there were no codes. I was told to drive it for 50-100 miles and the system ...2014 Silverado 1500 5.3. Temperature gauge quit working and fans running after shut off. No other malfunctions that I can see. Changed the sensor out, added coolant. Check engine light is on (constant) and temp gauge still not reading. Took it to have codes cleared but there were no codes. I was told to drive it for 50-100 miles and …7004 posts · Joined 2008. #3 · Mar 14, 2015. one fan turning on/off is perfectly normal. but it is a bit odd that it would go above 210 at all. if you turn on the a/c, that should automatically set the fans to the max fan speed. if the a/c is off, then it should depend on the temp of the coolant. next thing i would check is the thermostat if ....