Car cooling fan running high speed

1. I get the hot coolant smell from the driver's side seat with the window down and Jeep running (parked) and if get out, can smell in this area standing by driver's door (hood closed). 2. Get a slight smell of hot coolant on right side of engine compartment.Jan 29, 2018 · One failure mode is the fan stays on high speed when there is a loose solder joint on the PC board inside of it. Check the electrical connector to the fan motor if you haven't done so for water intrusion. One would assume that if the engine coolant sensor has failed or had a bad electrical connection that it would cause a check engine light. Jan 29, 2018 · 2006 E350 4 matic. Blew the top radiator hose while driving. Got the car home as it was only two miles. The car didn't overheat terribly just lost some coolant. I replaced the coolant and hose of course. Now as soon as the car is started the fan stays on at the very high speed. I am guessing the... Aug 26, 2010 · With this problem there are 2 possible causes the first will be the easiest and the cheapest. Replace the fan relay in the fuse panel its #45. CLICK HERE for a picture. And the second if the relay does not fix it would be the cooling fan. Please let me know what you find out. The A/C is actually on when this happens. Why I have no idea. It's 33F out, cold engine just started, climate control is set to 72 Auto, and the a/c indicator is OFF. Turning it the a/c manually on and off seems to stop it, and the fan shuts off a short while later. That's why. It thinks defrost function is supposed to be activated.Poor air conditioning performance. A faulty cooling fan relay can also negatively affect air conditioning (A/C) performance.The reason being, on most vehicles, is that the cooling fan doubles as a condenser fan.When the A/C is turned on, the fan moves air across the A/C condenser, thereby removing heat from the refrigerant, which changes from a vapor to a liquid state as it gives off heat it ...Apr 08, 2018 · Changed the ECT (Engine coolant temperature) Sensor. It’s located behind the motor block by the thermostat housing. I took the engine cover off and you can reach right to it, it’s a 19mm deepwell socket. Took about 10 minutes to do, an it’s like a $20 part. DrivenDaily Administrator 2011 Malibu LTZ 3.6L V6 Red Jewel Tintcoat Joined Dec 28, 2009 May 07, 2014 · On most days, about 10 seconds after I turn the car on, the fan will just kick into high speed and stay on no matter how long or how fast I drive. If it's a little bit cooler out (say 60-70F, which is cool for this time of year in Texas), the fan won't kick in until the engine warms up a bit, say to the 80-90F level. Dec 29, 2010 · Radiator cooling fans run continuously. My 2003 L200 (110k miles) is continuously running both radiator cooling fans (pusher and puller) whenever the engine is on, cold or hot, A/C on or off. They don’t run with key-on/engine-off. I replaced the engine coolant temperature sensor before digging any deeper and the problem is unchanged. Mar 14, 2018 ... The fan is designed to click on when the sensor detects the engine is over heading. It sends a signal to the vehicle's computer which turns on ...Well not just ceiling fan for that matter, if any fan is running at full speed it always consumes more current. For example if you take 100watt fan, if it runs in full speed it will consume 100watt power. If the same fan is connected with a regulator and it is running at half speed only 50watt power will consume. My radiator fan is blowing very hard and engine coolant temp wont go over 170? 1 Answer 40 Mvogt2 answered 3 years ago I think your thermostat might be stuck open and need replaced. Check temperature on your block with the temp your dash reads. If it's the same then that's what I would change. 4 people found this helpful. Mark helpful #1 cz p10c scopeApr 11, 2019 ... I an use Vida to command different speeds of the fan, but when I release control from Vida, it reverts to high again. The Engine Coolant ...Jul 18, 2015 · The fan starts when U turn on the AC, and the high speed is activated when there is a lot of pressure (around 20bar) in the high pressure part of the AC circuit (pressure switch). If the pressure switch is faulty it could trigger the high speed of the fan and it wouldnt stop untill the pressure drops. If it is ok, it turns on the high speed of ... WebI have a 2010 Malibu 2.4l and yesterday I noticed this loud noise coming from the engine. 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. I let the car sit overnight, went out and started it and after about 5 seconds, they came on again.Apr 4, 2015 ... If the fan is running at low speed, check that relay T6 isn't shorted.. The coolant temperature sensor is on the engine thermostat at the ...1. I get the hot coolant smell from the driver's side seat with the window down and Jeep running (parked) and if get out, can smell in this area standing by driver's door (hood closed). 2. Get a slight smell of hot coolant on right side of engine compartment.WebWebWeb citadel mall stadium 16 Info. The situation when the car radiator cooling fan keeps running constantly can be caused mostly by a failing coolant temperature sensor or its wiring, broken fan start relay, damage to the electrical wires, and electronic engine control unit (ECU) problems. To understand how the cooling fan should work correctly, you need to know at what ...WebMar 6, 2019 ... Please try again later. This is a very common problem with the Mercedes radiator cooling fan running constantly on high speed. The problem in ...Answer: In older cars, the engine cooling fan used to be driven by a belt, which also powered the alternator or the dynamo. It was observed that the size of the fan pulley was slightly less than that of the crankshaft pulley. Therefore the speed of the fan was slightly (around 20 %) higher than ...Nov 20, 2008 · This was happening more when the temperature was 60 degrees F or higher, when the temperature was 35 - 45 degrees F it only would run for about 3 minutes after ignition off. Yet another symptom is that the radiator cooling fan will ramp up to the highest rpm even with a quick 1 mile wawa run, driving no more then 30 mph and keeping rpm at 2500 ... WebDec 29, 2017 · For the climate control system, try the test/reset procedure: With the engine running, simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin to blink. The lights should blink for about 20-30 seconds while the system is tested. best time to catch mackerel from a pier Question: I have a 2014 Ford F-150 with the 5.0 engine. When the outside air temperature is 95 degrees or above, the air conditioning system kicks into a "high gear" and has been described on ...Web varo routing number invalidSteady driving 50-60 mph and the engine temp seems to stabilize around 106 degC (too hot) and the fans are both ramped up to approx 70%, despite the forward speed of car through the air. Heat coming off the radiator is not much above ambient. With the engine at 106 degC the air should be hot. - not enough hot water coming into radiator from engine.Aug 16, 2009 ... The fan speeds are automatically selected depending on how hot/high the pressures are to cool off the condenser coil/radiator otherwise ...Nov 20, 2008 · Yet another symptom is that the radiator cooling fan will ramp up to the highest rpm even with a quick 1 mile wawa run, driving no more then 30 mph and keeping rpm at 2500 or and shifting around 2700 rpms. My temperature display is right in the middle, the car appears to warm up normally in the morning as well. Jan 15, 2019 ... Your radiator fan should kick in at about 200 degrees Fahrenheit. If you notice your vehicle is overheating or at the very least running ...Feb 1, 2018 ... cooling fans will kick into high after about 1 minute after engine start. they cycle on and off maybe every 3 minutes. Like run for 2 ...Dec 29, 2017 · For the climate control system, try the test/reset procedure: With the engine running, simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin to blink. The lights should blink for about 20-30 seconds while the system is tested. Does it start only when it gets hot? Does it kick on automatically at 3rd (full) speed? There should be 3 speeds for the fan that kick in when the engine gets ...Oct 7, 2008 ... my radiator fans are allways running on high speed. engine can be stone cooled, 30F. and they run. thanks for reading my posting.WebDec 29, 2017 · For the climate control system, try the test/reset procedure: With the engine running, simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin to blink. The lights should blink for about 20-30 seconds while the system is tested. This is a very common problem with the Mercedes radiator cooling fan running constantly on high speed. The problem in most cases is a bad ecm so in order to fix it the ecm will have to... Jun 15, 2011 · Jun 15, 2011 #1 SLK320 Automatic 2002 model. The key turns normally in the ignition switch and all the dash lights come on as usual, but the starter motor doesn't turn when I turn the key to the final position. Also, after a few seconds the engine cooling fan starts to run at full speed. The battery is healthy. My cooling fan is constantly running and at high speed and my a/c doesnt work on my 2011 ford escape. Ask an Expert. Car Questions. Ford Repair. Share this conversation. Answered in 13 hours by: 4/10/2014. sprinkles08, ASE Certified Technician. The fan low and high speeds are controlled by the PCM thru the low and high speed relay coils that are constantly fed with 12V + and through the PCM ground. My guess is either you have bad relay contacts or the PCM is providing ground path even with the engine off. Oh I noticed, the dealer replaced the relays and PCM.Radiator cooling fans run continuously. My 2003 L200 (110k miles) is continuously running both radiator cooling fans (pusher and puller) whenever the engine is on, cold or hot, A/C on or off. They don't run with key-on/engine-off. I replaced the engine coolant temperature sensor before digging any deeper and the problem is unchanged.Web canada trust easyweb Discussion Starter · #1 · Feb 1, 2018 2010 acadia Mid-Michigan (COLD, lol) cooling fans will kick into high after about 1 minute after engine start. they cycle on and off maybe every 3 minutes. Like run for 2 minutes, then a minute off, then back to running. etc. I suspect its my coolant temp sensor. I have no codes. How can i test for sure? thanksJul 18, 2015 · The fan starts when U turn on the AC, and the high speed is activated when there is a lot of pressure (around 20bar) in the high pressure part of the AC circuit (pressure switch). If the pressure switch is faulty it could trigger the high speed of the fan and it wouldnt stop untill the pressure drops. If it is ok, it turns on the high speed of ... With the engine running and at operating temperature, touch the terminal positive and ground with the respective multimeter probes, you should get running voltage (about 14V), indicating the fan should be running. If your test proves incoming power, replace the fan motor. Check for any blown fuses or a tripping breaker.Oct 14, 2001 · Put the heating system on economy setting to turn off the A/C compressor and fan. Problem goes away. Going back to the dealer tomorrow. Will post solution. Cann't believe with all the computer controls that using the Auto setting when the temp is 52 degrees F activates the fan... Reply Like 10-20-2001, 01:58 PM # 7 summersr Junior Member Answer: In older cars, the engine cooling fan used to be driven by a belt, which also powered the alternator or the dynamo. It was observed that the size of the fan pulley was slightly less than that of the crankshaft pulley. Therefore the speed of the fan was slightly (around 20 %) higher than ...Browse Our Collection Of Replacement Automotive Parts Including Engines & Car Accessories. We Have Over 1 Million Parts & 800 Brands To Choose From. ... Shop High Performance Aftermarket Auto Parts & Accessories. Instant Savings ... JEGS Portable 3-Speed Blower Fan [110-Volt] $73.99 $81.99 JEGS Jumper Cables 4-Gauge Wire 500-Amp Rated.Here is what I tried prior to reaching my conclusion: 1. Read wiring diagram and operation description and saw fan ran through the pressure switch. Removed pressure switch and fan shut off. 2. Read wiring diagram and operation description and removed both radiator fan relays one at a time, which would shut the fan off. 3.Web zillow homes for sale 16652 Well not just ceiling fan for that matter, if any fan is running at full speed it always consumes more current. For example if you take 100watt fan, if it runs in full speed it will consume 100watt power. If the same fan is connected with a regulator and it is running at half speed only 50watt power will consume. It can be normal for the cooling fans to run constantly under certain conditions. If the car is hot enough, they may be barely keeping up with demand and stay ...Jul 18, 2015 · The fan starts when U turn on the AC, and the high speed is activated when there is a lot of pressure (around 20bar) in the high pressure part of the AC circuit (pressure switch). If the pressure switch is faulty it could trigger the high speed of the fan and it wouldnt stop untill the pressure drops. If it is ok, it turns on the high speed of ... Radiator Fan 4 Answers. My 2011 Chevy Cruze radiator fan kicks on about every 20 seconds on high speed sounding like a jet taking off running for about 5 seconds then kicks off and repeats nonstop. Car is not getting hot ...WebHIGH RADIATOR FAN SPEED On a cold start, my cars radiator fan starts up but at high speed (sounds like a jet engine). it is below 30 degrees out and i have my heat and a/c off. once it starts up it never stops for the full drive. this started about 3 days ago and now my check engine light came on.WebA carburetor (American English) or carburettor (British English) is a device that mixes air and fuel for internal combustion engines in an appropriate air-fuel ratio for combustion. The term is sometimes colloquially shortened to carb in the UK and North America or to carby in Australia.. To carburate or carburete (and thus carburation or carburetion, respectively) means to mix the air and ... used metal buildings for sale on craigslist near dublin Well not just ceiling fan for that matter, if any fan is running at full speed it always consumes more current. For example if you take 100watt fan, if it runs in full speed it will consume 100watt power. If the same fan is connected with a regulator and it is running at half speed only 50watt power will consume. DIY - BMW radiator fan stuck on high? - electric water pump diagnosisBuy your parts here! -- http://go.magik.ly/ml/7uko/Here I will explain the diag proces...I have a 99 323i. It is different than most E46 in that it has only one large electric cooling fan on the back of the radiator. It has no small front fan nor a clutch driven fan behind the radiator. I think they only did this in 99, or 99-00. It uses some sort of transistor or resister to thingy to regulate fan speed.WebWebJan 10, 2016 ... fan will only run on high speed for about 30 seconds on start up after a hot soak then slow down to slow speed. If I remember correctly the fan ...Many cars use an A/C pressure switch which, as well as a maximum/minimum cutoff, will turn on the cooling fan if the system pressure rises above a set point.WebWeb why is my paypal account restricted Apr 19, 2020 ... In the last year I noticed my car running the cooling fans a lot more often excessive and often even activating the AC compressor.Feb 17, 2016 · One for low speed, one for medium speed, and both for high. The 5 fan relays change that into 3 wires going to the fan module: low, medium and high. (There's another wire somewhere for the ground return.) In the fan, the low and medium run though resistors and a thermal fuse. High is direct and bypasses the thermal fuse. Well not just ceiling fan for that matter, if any fan is running at full speed it always consumes more current. For example if you take 100watt fan, if it runs in full speed it will consume 100watt power. If the same fan is connected with a regulator and it is running at half speed only 50watt power will consume. Mar 6, 2019 ... Please try again later. This is a very common problem with the Mercedes radiator cooling fan running constantly on high speed. The problem in ...Jul 18, 2015 · - high speed on fan - Depollution fault on Display - Random disorder on injectors (DiagBox shows that one injector but not always on the same cylinder... ) - oil on spark plug on the cylinder that has the problem With DiagBox all activators of ECU work fine, coils, injectors, fan etc So far we have changed: - thermostat - the omron relay on fan Depending on whether the engine is hot or cold, there are a couple different reasons why a car might start with no problem but stall shortly afterwards. If the problem only happens when the engine isApr 10, 2021 · Fan at high speed? A fan running at high speed means the CPU is hot and trying to cool itself down. It could before several reasons: It’s unable to cool due to clogged air vents or failing fans. The computer is legitimately working on something CPU-intensive. The computer is running something you didn’t expect . . . such as malware. hoddesdon room to rent gumtree If the fans are coming on at low speed both fans are okay. Then when the ECM commands high speed operation it sends a ground signal to all three cooling fan relays. During that phase those relays split them back into two separate fans and sends 12 volts to each and they run at high speed. To test the fan control relays you can swap them.When the engine is running, the radiator cooling fan runs full-bore. The temperature sensor seems to be fine as the temp gauge reads accurately. I can run the ...WebDec 29, 2017 · When the engine suction fan runs at high speed like that, it means it is not communicating with the ECU. I'd start be checking the wiring for it to make sure it looks properly connected. For the climate control system, try the test/reset procedure: With the engine running, simultaneously press and hold the RECIRC and FRONT DEFOG buttons until ... three js globe codepen WebDec 29, 2017 · For the climate control system, try the test/reset procedure: With the engine running, simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin to blink. The lights should blink for about 20-30 seconds while the system is tested. WebJul 18, 2015 · Hello, out of my experience a faulty coolant tempearture sensor can also cause this behavior. I had last week a Peugeot 207 with a faulty one and the car was acting totaly strange including misfire and fan running at high speed. On the diagnose the temp seemd to be allright but after a visual inspection the sensor was damaged by corosion. The dreaded cooling fan bearing failure on our 17 pathfinder occurred at 43k miles. I took it to an independent shop to replace. I have now noticed that both fans run all the time, no matter if the A/C is running or not. I believe it is an aftermarket fan/relay assembly from A1 auto. I even noticed that putting it in "on" (double press the push ...Mar 22, 2021 ... If it's more frequent than normal then your system might be low on refrigerant. The fan is coming on with the compressor and a compressor that's ...Aug 06, 2010 · Discussion Starter · #1 · Aug 6, 2010. My 2002 ML500 suction type electric cooling fan always runs at high speed whenever the engine is running. If you disconnect the control connector from the module on the fan support and leave the power connected the fan does not run. The fuse for the suction type fan (going by the fuse box cover) is fine. The radiator fan turns on because the temperature of the engine coolant has risen to a level where a temperature sensor determines air around the radiator is ...Needless to say, the all-synchro gearbox, differential and running gear are all completely rebuilt and a number of subtle upgrades have also taken place such as an overdrive unit, high-volume radiator, an external oil filter, Kenlowe fan, triple electric fuel pumps, battery isolator and a more modern 12-volt electrical system.WebDec 24, 2010 ... There is a temperature control valve somewhere in that system that varies the fan speed by regulating the oil the hydromotor recieves. That same ...Aug 26, 2010 · With this problem there are 2 possible causes the first will be the easiest and the cheapest. Replace the fan relay in the fuse panel its #45. CLICK HERE for a picture. And the second if the relay does not fix it would be the cooling fan. Please let me know what you find out. WebWebSep 03, 2012 · Either a signal that the engine is hot or that the air conditioning condenser (located in front of the radiator) is telling it that it's hot and to run fast to cool it down. In my case, the dryer bag had leaked causing the particles to block up the condenser enough such that it was getting hot and signaling the fan to run faster. WebOct 14, 2001 · Put the heating system on economy setting to turn off the A/C compressor and fan. Problem goes away. Going back to the dealer tomorrow. Will post solution. Cann't believe with all the computer controls that using the Auto setting when the temp is 52 degrees F activates the fan... Reply Like 10-20-2001, 01:58 PM # 7 summersr Junior Member Jan 13, 2022 ... Speed is controlled based on engine temperature, vehicle speed (no need for fan if going fast enough), and AC high-side pressure. AC high side ...Dec 29, 2017 · For the climate control system, try the test/reset procedure: With the engine running, simultaneously press and hold the RECIRC and FRONT DEFOG buttons until their indicator lights begin to blink. The lights should blink for about 20-30 seconds while the system is tested. Both cooling fans run constantly. The AC is off. Engine cold, start up, and they both run continuously. ... Your car is old enough to use a F129, four wire double switch, not the 3 wire G65. ... or the FCM high speed fan relay is stuck on. Look for an email. A. atmarine Veteran Member. Joined Mar 24, 2013 Location Ny state TDIJun 15, 2011 · Jun 15, 2011 #1 SLK320 Automatic 2002 model. The key turns normally in the ignition switch and all the dash lights come on as usual, but the starter motor doesn't turn when I turn the key to the final position. Also, after a few seconds the engine cooling fan starts to run at full speed. The battery is healthy. Jun 1, 2022 ... A cooling fan temperature switch (or sensor, in some vehicles) can also get stuck, which may cause the fan to run continuously any time you turn ...Web knight frank north east WebOct 23, 2022 · Look at refrigerant pressure, specially noting if it too high for the ambient temperatures. For example, at a coolant temperature of 51.0°C (123.8°F) the refrigerant pressure should be no more than 12 bar. If it is higher, the air-conditioning control module presumes that the pressure is high and assigns the fan control module to run at 90% ... Mar 25, 2020 ... The drop in voltage will cause the fan to run at low speed. If the resistor is bad, most likely just broken, then the power would not pass ... iu urology doctors WebMy radiator fan is blowing very hard and engine coolant temp wont go over 170? 1 Answer 40 Mvogt2 answered 3 years ago I think your thermostat might be stuck open and need replaced. Check temperature on your block with the temp your dash reads. If it's the same then that's what I would change. 4 people found this helpful. Mark helpful #1Jun 18, 2020 ... Engine temp guage is reading normal, coolant level is normal and no codes in VCDS. Anybody come across this before, and what was the cause?The radiator fan turns on because the temperature of the engine coolant has risen to a level where a temperature sensor determines air around the radiator is ...WebHIGH RADIATOR FAN SPEED On a cold start, my cars radiator fan starts up but at high speed (sounds like a jet engine). it is below 30 degrees out and i have my heat and a/c off. once it starts up it never stops for the full drive. this started about 3 days ago and now my check engine light came on.The radiator fan turns on because the temperature of the engine coolant has risen to a level where a temperature sensor determines air around the radiator is ...Jun 28, 2018 ... Those fans will not switch to high speed until the coolant reaches 226 degrees. To determine if there is an actual problem you need to know ...WebAug 16, 2009 ... The fan speeds are automatically selected depending on how hot/high the pressures are to cool off the condenser coil/radiator otherwise ... visiting saugatuck Jul 18, 2015 · - high speed on fan - Depollution fault on Display - Random disorder on injectors (DiagBox shows that one injector but not always on the same cylinder... ) - oil on spark plug on the cylinder that has the problem With DiagBox all activators of ECU work fine, coils, injectors, fan etc So far we have changed: - thermostat - the omron relay on fan Aug 26, 2010 · With this problem there are 2 possible causes the first will be the easiest and the cheapest. Replace the fan relay in the fuse panel its #45. CLICK HERE for a picture. And the second if the relay does not fix it would be the cooling fan. Please let me know what you find out. Oct 23, 2022 · Look at refrigerant pressure, specially noting if it too high for the ambient temperatures. For example, at a coolant temperature of 51.0°C (123.8°F) the refrigerant pressure should be no more than 12 bar. If it is higher, the air-conditioning control module presumes that the pressure is high and assigns the fan control module to run at 90% ... WebWeb common coliving reviews HIGH RADIATOR FAN SPEED On a cold start, my cars radiator fan starts up but at high speed (sounds like a jet engine). it is below 30 degrees out and i have my heat and a/c off. once it starts up it never stops for the full drive. this started about 3 days ago and now my check engine light came on.WebWebOct 27, 2014 · Steady driving 50-60 mph and the engine temp seems to stabilize around 106 degC (too hot) and the fans are both ramped up to approx 70%, despite the forward speed of car through the air. Heat coming off the radiator is not much above ambient. With the engine at 106 degC the air should be hot. - not enough hot water coming into radiator from engine. DIY - BMW radiator fan stuck on high? - electric water pump diagnosisBuy your parts here! -- http://go.magik.ly/ml/7uko/Here I will explain the diag proces...Dec 29, 2017 · When the engine suction fan runs at high speed like that, it means it is not communicating with the ECU. I'd start be checking the wiring for it to make sure it looks properly connected. For the climate control system, try the test/reset procedure: With the engine running, simultaneously press and hold the RECIRC and FRONT DEFOG buttons until ... ophthalmology fellowship in turkey WebOct 14, 2001 · Put the heating system on economy setting to turn off the A/C compressor and fan. Problem goes away. Going back to the dealer tomorrow. Will post solution. Cann't believe with all the computer controls that using the Auto setting when the temp is 52 degrees F activates the fan... Reply Like 10-20-2001, 01:58 PM # 7 summersr Junior Member WebJun 14, 2021 ... Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running. A faulty or broken relay cannot ... hmh into reading 4th grade pdf This problem is often caused by a faulty pressure sensor located on the air-conditioning condenser. If accessing fault codes, there are no relevant DTCs stored ...It can be normal for the cooling fans to run constantly under certain conditions. If the car is hot enough, they may be barely keeping up with demand and stay ...Needless to say, the all-synchro gearbox, differential and running gear are all completely rebuilt and a number of subtle upgrades have also taken place such as an overdrive unit, high-volume radiator, an external oil filter, Kenlowe fan, triple electric fuel pumps, battery isolator and a more modern 12-volt electrical system.WebWeb 2017 chevy equinox pcv valve Question: I have a 2014 Ford F-150 with the 5.0 engine. When the outside air temperature is 95 degrees or above, the air conditioning system kicks into a "high gear" and has been described on ...WebJan 29, 2018 · One failure mode is the fan stays on high speed when there is a loose solder joint on the PC board inside of it. Check the electrical connector to the fan motor if you haven't done so for water intrusion. One would assume that if the engine coolant sensor has failed or had a bad electrical connection that it would cause a check engine light. Does it start only when it gets hot? Does it kick on automatically at 3rd (full) speed? There should be 3 speeds for the fan that kick in when the engine gets ... asus merlin ttl