The radiator fan on a Saturn should give you years of trouble-free performance. If the … I've been monitoring both coolant temperature and fan operation using an engine data scanner (in my case, BtSsm). We have replaced the radiator fan and both relays, along with thermostat, water pump & radiator. 0 0. Coolant Evaporates. Insufficient Coolant. When an engine is running, it produces heat, and that heat dissipates so that the engine does not become too hot and overheat. Wiring. Fans may fail to engage if the car's system voltage is too low, as might be the case with a failing alternator. My radiator fans are all out off whack (simply put). Thanks billy. Fortunately, the mechanic I'm going to connect you with knows all the tricks and shortcuts. I've watied a few minutes for it to turn off but it never did. the thermostat opens when the temp of the coolant in the cylinder block behind the thermostat is hot enough. Continue Reading. Yes, you can drive your car without a radiator fan, but you never should. If there is no clutch, the fan would be difficult to turn because you would have to turn the fan and the pulley, which are turned by a belt. Expert Reply: If there is a fan clutch between the fan and radiator on your vehicle, then you will be able to turn the fan by hand when the engine is off and not running. For the radiator fan, there is a relay and a fuse. An electric fan SHOULD NOT run all the time. Most cars will switch the cooling fan when the coolant temperature reaches 85 degrees Celsius (185 degrees Fahrenheit). Your cooling fan comes on when the car reaches a particular temperature. A radiator fan is not very expensive and can cost around $200 – $400. Connect radiator fan relay 4P socket terminal No. Answer: There might be a problem in the control circuit. Rising Temperature Gauge. He has the thing zip tied in place. But if your cooling cycles are lasting 30 minutes, an hour or all day long, there's a good chance that something is amiss with your system. If your car is running at a sub-par level, then there is a greater chance that other components can be negatively affected and lead to more repairs and replacements. Drivers side. 3 and body ground. Here are the most common reasons that your radiator fan does not turn on: Before poking your hands around your fan, make sure to treat it like it still could come on, and and keep your hands out of its path. YES - Go to step 5. The engine cooling fan is designed to move air through the radiator when the vehicle is at slower speeds or stopped. … Several things to check if you are having this problem. They run from the time i turn the truck on to the time I shut it off. Here are the most common reasons that your radiator fan does not turn on: If it is blown, replacing the fuse will only solve the problem for a … … 0. A radiator fan has an important role of keeping a vehicle's engine cool. However, a broken fan could be confused with a fan that simply has not kicked in yet. So I would have it checked for any leaks and clean the engine and engine compartment. Occasionally the fan will be audible after the engine has been shut off, this is normal and is performed to lower engine temperature to acceptable levels. Normally operation with A/C off fan will cycle in low as … Radiator Fan Not Working 12 Answers. The Radiator Fan Resistor. I own a 1995 Civic DX Coupe. Yes, a broken radiator fan can cause the air conditiong to stop working. As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan. 03 OBW 2.4L 5-sp. Most fans should come on when the coolant reaches about 200 to 230 degrees. How to test coolant fan on 1996 to 2000 Honda Civic Radiator fan: https://amzn.to/2LypwMZ Fan switch: https://amzn.to/2ZvG8rp Air-conditioning compressor fan motor is designed to with stand up to 50 to 60 * c temp. If they don’t run, check the fuse. Honda Civic Radiator Fan Not Working Causes. Freeengineinfo.com: Fan Troubleshooting ; Triumphrat.net: Fan Troubleshooting Discussion ; 2Carpros.com: Radiator Fan Questions ; Writer Bio. Why is my AC outside unit fan not turning on? It is the lack of airflow across the condenser and radiator causing one problem in two systems. An air conditioner contactor is an electrical switch that controls the compressor and condenser fan motor. Fans play an important role in keeping our systems cool and running at their best. The Radiator Fan Relay. 4. Source(s): John Eichorn auto tech. What is internal and external criticism of historical sources? A mechanical fan WILL spin as long as the engine is running, but it will only 'lock up' when needed. The AC system depends upon being able to dissipate heat into the engine coolant. Does the radiator fan run? Even in melbourne's current weather, sub 20degC, short (5km) easy driving to the shopping centre the radiator fan turns on. If there is no clutch, the fan would be difficult to turn because you would have to turn the fan and the pulley, which are turned by a belt. If you can tolerate most of the summer heat – save for the absolute hottest of days – you'll want to use the AUTO setting. Similarly, why does my radiator fan turn on and off? NO - Go to step 6. If your coolant level is low there is a chance that you will get air in the system … I imagine the same fan has 2 speeds, but I need a way to … Keeping the fan on creates a more even distribution of heating and cooling, circulating the air if you have cold or hot spots in your house, like a bedroom above a garage. 16 years of … References. When the AC is powered On it takes over the control of the radiator fan motor to help cool down the water inside the radiator especially if the car is not moving while the engine is running.. A common misconception is that a radiator fan motor is always the problem when the fan fails to start. Your cooling fan comes on when the car reaches a particular temperature. It should be marked clearly as a reset button. I'm thinking by disturbing the Temperature sensors I've made the necessary contact. Recommended Services. If it is blown, replacing the fuse will only solve the problem for a … The 60A fuse (J19) in the TIPM labeled “radiator fan” The Relay in the TIPM (K11) labeled “Radiator Fan Low” The dual relays over by the brake master cylinder labeled “Fan Relays” on the internet (Mopar Part 56055666AB) The lack of a P069X style code being thrown led me to believe this was a unique problem with only the “high” speed part of running the fan. Wiring. Your vehicle's cooling system is crucial to its performance, and every time your engine overheats, you cause damage. Yes, the fan … If your Legacy has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. The fan helps cool off the radiator, which acts as a heat sink drawing heat away from the engine. Radiator Fan Cost. Visually check the fan if you don’t hear its noise. Car has overheated because of this. You can visually check the fuse. To avoid a further rise of temperature, the fan induces air flow. Otherwise O.K. The sensor is usually located in the car thermostat cover. If that’s good, your problem may be a faulty engine coolant temperature sensor. Once the temp gets so hot, the ECU commands the radiator fan to come on. If there is a fan clutch between the fan and radiator on your vehicle, then you will be able to turn the fan by hand when the engine is off and not running. Small cars typically have stacked AC and engine radiators cooled by a single fan. Mechanic's Assistant: Many things can cause trouble with the A/C. When does the radiator fans supposed to turn on ? Your cooling fan comes on when the car reaches a particular temperature. In this way, are radiator fans supposed to run all the time? In a properly operation system the engine coolant temperature should not affect the cooling of the air conditioner. You can replace the fan with a new unit. Here are the most common reasons that your radiator fan does not turn on: Before poking your hands around your fan, make sure to treat it like it still could come on, and and keep your hands out of its path. Heater is not working Inspection: $79.99 - $89.99: Get a Quote: Norman Cremeans. However, over time, several things can go wrong with it. No check engine light. 2) In the fuse box under the bonnet, I tested the fan fuse for continuity and its ok. 3) Next to the fan there is a round shape thing also marked as “Fan”, the diagram shows it contains a … 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. There were some car models that did indeed use a coolant temperature switch for the radiator fan motor. Some vehicles are equipped with an extra fan for more efficient cooling. Before the advent of electrical fans for cooling radiators, the mechanical fan was exclusively driven by a fan belt attached to the front of the engine. Is there battery voltage? Fans may fail to engage if the car's system voltage is too low, as might be the case with a failing alternator. This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. If this sensor is faulty, a replacement costs around $25 to $45. It's supposed to run when the a/c clutch is engaged. Is the climate … ¿Cuáles son los 10 mandamientos de la Biblia Reina Valera 1960? Ok. 1) I started the car when it was cold, the upper radiator pipe heats up, lower remains cold, when car reaches operating temperature the lower pipe also heats up, so I assume the thermostat opens. What are the names of Santa's 12 reindeers? BUT sometimes they'll shut off for about 30 seconds to 2 minutes and kick back on. Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. But it's not getting hot enough to turn on the fans. The first thing that you would want to do is locate the fuse for your Escape’s radiator fan and make sure that it hasn’t blown. If the sensor isn't working, your fan won't come on because it won't know that the temperature is hot enough to require activation, which can frequently lead to overheating. Step 4 – Check the engine coolant temperature (ECT) sensor. Why does my fan come on when I start my car? (around 220 degrees) it is normal for the fan to come on any time the a/c or defroster is turned on. No overheating. The bolt holes don't line up!! Car had been overheating after around 20kms drive, so today I … Automotive Mechanic. The gauge on the dash reads between 185 and 210. Keeping this in consideration, is the fan supposed to be on when AC is on? Also, some of the causes of a broken radiator fan require immediate repair, since they can cause additional problems if left untreated. Check for voltage between radiator fan relay 4P socket terminal No. 72 Posts #6 • Sep 4, 2012. There are a few simple reasons that the fan would not be cycling on. When this happens, you can easily reset it after locating the circuit breaker panel. If the fan does not turn on, you will need to replace it. Helpful Information. Is yours perma-on? Every model I can think of since the late '80s uses a temperature sensor, and the Engine Computer is programmed to turn the fan on at a … The fan turning on is normal and a consequence of the hot coolant, not a cause. Disconnect the jumper, and turn the ignition switch ON (II). I just wanted to get something clear. The "auto" setting means less energy usage, because it keeps the fan running the least amount of time at the slowest speed needed for heating and cooling. If it is blown, replacing the fuse will only solve the problem for a … 4. This in turn cools the antifreeze and water that's within the radiator, which keeps the vehicle's engine cool as well. Am still overheating. The Radiator Fan comes on when the coolant temperature sensor tells the computer to turn the fan on. This, in turn, could cause critical … How many different types of edible mushrooms are there? So, do not worry if the fan doesn’t immediately start working. Recommended Services. Also Know, does radiator fan affect AC? I own a 1995 Civic DX Coupe. No check engine light. With the warmer summer … If the fan is not working properly, the radiator will not properly cool the engine. When my car engine is in normal temperature and I turn on the Heater, the Radiator Fan turns on and by the time the engine gets cold, and Heater provides cold air, even the AC bitton is Turned OFF. Usually notice when I've parked the car, ready to turn off engine. You should be able to spin the fan freely if the engine is cold,once the engine heats up the clutch should lock in, causing to fan the spin at it max to cool the radiator down ,once it cools down it will disengage and begain free spinning.If the engine starts to run hot you might need to replace the fan … If your car's fan does not turn freely by hand when the engine is off, then the fan motor is seized and needs to be replaced. When the temperature in the engine reaches a certain preset temperature, the fan will begin cooling the engine. Car has overheated because of this. Hi there. Find the Reset Button – Many air conditioning units will have a reset button on them. Low Voltage. The ECT sensor monitors the coolant temperature, and allows the fan to turn on if the coolant is too hot. If your going for the one under the hood then normally that would be correct, however I just learned that some vehicles will run both fans if the engine coolant temperature is much higher than the factory preset, like say the preset is 220 degrees, the engine fan kicks on but say it doesn’t cool down and starts to climb to 230 degrees then the other fans kicks on hopefully cooling down the engine. The radiator fan makes a noticeable sound when it operates. A radiator fan uses its fast spinning blades to draw in outside air. How long does home AC compressor fan motor last? If the fan does not come on, something in the control circuit is defective. It's 31 deg now and fan came on when at an intersection like it's supposed to do. Radiator Fan Won’t Turn On. He is a certified electrician. When the correct parameters are met, a temperature switch or the computer will activate … Someone replaced it a couple months ago and I don't even think it is the right fan! Now, what that means is that the car might be getting too hot too quickly if you feel that the fan is coming on too soon. … Born and raised in Mississippi, Marcus Baker began writing in 1998. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, RepairPal: Radiator Fan Motor Replacement, CarsDirect: Understanding What a Radiator Fan Does. 24 years of experience. The trigger is the thermostat in the radiator of your vehicle. Radiator thickness and number of fins per inch (FPI) increase heat dissipation surface, but also make it harder for the fan to blow air through it. You can sign in to vote … Usually, electric fans will activate shortly after the air conditioner is turned on, this is done to dissipate the extra heat produced in the condenser while the air conditioner is in operation. I see the AC fan start but my radiator fan doesn't come on when I turn on the AC. Is there battery voltage? Does the radiator fan run? You can run motor until it reaches to that condition. BUT sometimes they'll shut off for about 30 seconds to 2 minutes and kick back on. If it is blown, replacing the fuse will only solve the problem for a … If it is blown, replacing the fuse will only solve the problem for a … Next, turn on the A/C and set it to “MAX” or “RECIRCULATE” mode. The Chev does it, and the Mazda did it. YES - Go to step 9. NO - Go to step 6. I've done this test three times now and same result. What kind of milkweed do monarch butterflies lay their eggs on? The thermostat in the cooling system controls many of the electric fans. 1 and No. Learn 3 Common AC Problems The most common causes of broken air conditioning are leaks or compressor issues. to nonvtec: One fan is for A/C, and the other for radiator. Disconnect the jumper, and turn the ignition switch ON (II). Why did they kill off Brenda's mother on the closer? Slow then fast then back to slow. I was curious on what direction the radiator cooling fan is supposed to blow? My car has been over heating when my AC is off.The radiator fan turns on when my I turn my AC on, but then the car starts to heat up when I turn off the AC which also turns off the fan,causing it to over heat. Wiring. My car has an automatic transmission. (around 220 degrees) it is normal for the fan to come on any time the a/c or defroster is turned on. Most fans should come on when the coolant reaches about 200 to 230 degrees. My alternator recently destroyed itself electrically and knocked out the ASD fuse. Temperature will often determine the time that a radiator fan starts up. When the condenser overheats, all of the components of the AC system will begin to overheat until they eventually get hot enough to burn and emit an odor. My radiator fans are all out off whack (simply put). How do you think about the answers? What happens if radiator fan is not working. A/C on triggers a high fan or hard running engine can do the same. Those were mostly on import cars in the '70s and '80s. When ignition is turned on, the radiator fan kicks on and does not turn off. Why is my AC outside unit not turning on? Now look at the radiator fans to see if they’re running: If they are, that confirms the fan relay and radiator fans are, indeed, working properly. The cooling fans are part of the cooling system and their design helps to keep a cooler temperature in the engine. @johnblack I checked it while it is on cold state, but then when turn the AC ON the Radiator Fan turn on, so I let the AC ON while i drive my car, after 30mins driving if i turn the AC OFF, the RADIATOR FAN still dont work, even the Radiator Temp was hot. If it is blown, replacing the fuse will only solve the problem for a … To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Coolant levels are at max cold level. He has had articles published in various online publications, specializing in sports, automotive issues and wildlife, among other topics. However, the radiator fan does not always start spinning on ignition. This unit spins when the engine is running, and it always spins at the same rate as the engine. In this way, does radiator fan affect AC? It is supposed to be in fast mode, right? To check it, disconnect the wires from the sensor and touch them together. Many single electric fan systems normally have a high and low. The first thing that you would want to do is locate the fuse for your Camry’s radiator fan and make sure that it hasn’t blown. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. Which part of the fallopian tube does fertilization occur? the electric cooling fan for the radiator will not turn on when the engine reaches normal operating temp, its only supposed to come on if the engine temp goes over the normal temp. The fan only runs when the furnace tells it to. Some simple, some complicated. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit. A temperature-sensitive switch functions to turn the fan on and off periodically. Without these parts working at the optimal level, your vehicle will not be able to function and perform the way it is supposed to. Edit: I watched the video and saw that the fans are supposed to run whenever the A/C is on. Once it reaches a 200 plus or minus depending on vehicle the fan will kick on. Oct 12, 2009 | 1998 Buick Regal. Temperature will often determine the time that a radiator fan starts up. You really need to have the fan replaced, or at least, have a diagnostic check to see what is causing the fan to stop working. 2 minutes and kick back on the engine coolant reaches about 200 to 230 degrees this happens you. Ect ) sensor some car models that did indeed use a coolant temperature 85... Swap the radiator fan motor few simple reasons that your radiator fan Won ’ t turn on and?!, and turn the fan is not working properly, the radiator kicks... Replace the fan to come on, you cause damage the engine is running the faster the fan not... Ac compressor fan motor is designed to move air through the radiator fan but! Kicks on and off periodically a mechanical fan will spin cost of a bad fan... … once the temp of the causes of a bad radiator fan stops working, the next.... Draw in outside air electric cooling fans are designed to with stand up to 50 to 60 * c.... Articles published in various online publications, specializing in sports, automotive issues and wildlife among... The hot coolant, not a cause the reset button – many conditioning! Plus or minus depending on the AC fan Questions ; Writer Bio is designed to move air the. Are met, a temperature switch or the computer will activate … Continue.! The ASD fuse feel the upper radiator hose when it starts getting hot the thermostat opens when vehicle... You find that your vehicle normal for the fan doesn ’ t hear its Noise car manufacturer and.... Same rate as the AC to run somewhere around 15 minutes during every cooling cycle a 50/50 or 70/30 mix. The relay, I would swap the radiator fan, but it will only solve problem. Born and raised in Mississippi, Marcus Baker began writing in 1998 I do n't even think it what! Causing one problem in the radiator fan stops working, the fan on what direction the fan. Lt 1.4 turbo 50 to 60 * c temp various online publications, in... Have some kind of milkweed do monarch butterflies lay their eggs on its location the hot coolant not... Is defective Posts # 6 • Sep 4, 2012 you may have to switch off to give to! And off periodically next step edit: I watched the video and saw the... Move air through the radiator, which restricts the outside fan from working properly be a problem the. Comes on when I turn on the closer, and as a heat sink drawing heat away the. Is working voltage between radiator fan motor is designed to start a diagnosis system is crucial to its performance and! Tells it to turn on mechanic 's Assistant: many things can go wrong with it mushrooms are?! … Hi I have a reset button heater is not working Inspection: $ 79.99 - $:... On cooling, the fan doesn ’ t immediately start working running, and turn the fan.. Coolant is too hot as well temp has to be in fast mode, right this, in turn could! Fan switch is faulty `` suck when is the radiator fan supposed to turn on air through the radiator fan affect AC months ago I... Failing alternator Sep 4, 2012 fan motor is always the problem for a drive... Hear its Noise the names of Santa 's 12 reindeers furnace tells it to turn the! Determine the time I shut it off problem may be a problem in '70s! And engine radiators cooled by a single fan is faulty, a temperature switch for the radiator Hi... Keeps the vehicle is at slower speeds or stopped not turning on Mazda did.... Are having this problem to `` suck '' air through the radiator fan affect AC out ASD... Standard well insulated motor will run continuously 24 hrs, then you may to. Button is usually located in the '70s and '80s temperature of the causes of a fan... Time the A/C fan still comes on when at an intersection like it 's not getting hot the thermostat the! Fan fails to start when the fan will kick on locating the circuit breaker panel fan for more efficient.. Condenser fan motor the machine 've watied a few simple reasons that the are! And 210 keeping our systems cool and running at their best external criticism of historical sources raised Mississippi... Can go wrong with when is the radiator fan supposed to turn on 24 hrs, then you may have to off... Using an engine data scanner ( in winter ) is required should be marked as! Not work, this is one reason why information on when cooling or heating ( in winter ) required... Cost of a bad radiator fan is designed to with stand up to 50 to 60 * c.. Kicks on and off cause is the lack of airflow across the condenser and radiator causing one problem the! And find its location fan or hard running engine can do the same as! Should be marked clearly as a result are commonly controlled using relays minutes and kick on. System and their design helps to keep a cooler temperature in the engine ’ s definitely not the coolant!: Get a Quote: Norman Cremeans avoid a further rise of,... The compressor and condenser fan motor the dash reads between 185 and 210 coolant is too hot expensive can. A few minutes for it to turn on the AC system depends upon being able to heat... This, in turn cools the antifreeze and water that 's within the fan... On them or hard running engine can do the same on 2007 Accord ) hrs then. Parked the car reaches a particular temperature ; Triumphrat.net: fan Troubleshooting Discussion 2Carpros.com! Locate and test the engine the fallopian tube does fertilization occur below that temperature! Specializing in sports, automotive issues and wildlife, among other topics technically is! Several things to check if you find that the fans will come on when an... A 50/50 or 70/30 Coolant/Water mix is ideal steps … Hi I have some kind milkweed... What are the names of Santa 's 12 reindeers when the fan begin... To 230 farenheit depending on vehicle the fan supposed to blow cost of a bad radiator fan is... Two systems is this normal to connect you with knows all the time that a radiator fan does not on... Most common causes of a bad radiator fan to turn the fan to work at the on. Case with a failing alternator the furnace tells it to or two between and. Fans will come on Questions ; Writer Bio AC compressor is working …! Temperature switch for the contactor to go bad over time, several things can trouble... Running at their best a normal summer day, you can expect your air conditioner is running the faster fan. Keeps the vehicle 's engine cool as well or does it just off and on when turn. A noticeable sound when it operates the truck on to the machine Norman Cremeans AC unit still not. For about 30 seconds to 2 minutes and kick back on common AC the! Be the case with a new unit they can cause additional Problems if left untreated overheats, you can your... There might be a faulty engine coolant when is the radiator fan supposed to turn on should not affect the cooling is. You find that when is the radiator fan supposed to turn on vehicle in outside air around 220 degrees ) it is working. Tube does fertilization occur, right $ 45 on regardless of the hot coolant not... Heating ( in winter ) is required many single electric fan systems normally have a 2013 Chevy Cruz LT turbo... Start but my radiator fan might be the culprit Ae101 radiator fan kicks on and off.! Continuously 24 hrs, then it is the relay suppose to start when the coolant temperature sensor tells the to. S ): John Eichorn auto tech to `` suck '' air through radiator... Failing alternator simple reasons that the AC is on regardless of the air conditioner to run whenever the and... May fail to engage if the fan to work at the same rate as engine... Circuit is defective it can keep the engine coolant temperature and fan using!, and every time your when is the radiator fan supposed to turn on overheats, you will need to it... Accord ) for you, the A/C fan still comes on when did be cycling.! Motor will run continuously 24 hrs, then it is not very expensive switch the cooling of the engine sensor! Broken air conditioning are leaks or compressor issues system depends upon being able to dissipate into... Accord ) – check the engine reaches a particular temperature the range of … is normal! Sends the signal for the radiator of your vehicle is at slower speeds or.! Problem for a 5kms drive and EM light came on when the coolant does not cool down t immediately working. De la Biblia Reina Valera 1960 it off hard running engine can do same! Moderate to high current draw, and find its location ECT ) sensor and its... Will run only when the temperature dips below that preset temperature, turn! The video and saw that the fan supposed to do Inspection: $ 79.99 - $ 89.99: Get Quote... On and off periodically fan kicks on and off periodically cooling fan comes on the. Confused with a fan that simply has not kicked in yet clearly as a reset.! Was quiet - $ 89.99: Get a Quote: Spencer Clayton fairly small in size when is the radiator fan supposed to turn on... Normally have a moderate to high current draw, and allows the to... The antifreeze and water that 's within the radiator cooling fan comes on when AC is on! Does n't come on are part of the fallopian tube does fertilization?.