how to make radiator fan come on

Start your vehicle, and let it idle for 10-15 minutes. This will make both cooling fans come on simultaneously, meaning less run time for both fans if the cooling system is in good condition. The transmission slips because it is overheats. This is one reason why information on when a radiator fan is suppose to start can be beneficial to vehicle owners. As for the engine coolant temp sensor, if the coolant is not hot enough to make the fan come on, then there is no need for the fan yet and there is no problem. The cooling fans dont come on, and I want to know how to make them come on when I turn the key ON. Faulty wiring could be to blame. The most common symptom of a faulty cooling radiator fan motor is that the cooling fan does not come on. 1988 Reatta-How do I make my Radiator fan come on all the time when I turn on the car? Defective fan relay. The primary symptom of a bad radiator fan relay is an inoperative fan. Without the rotating mass of the fan, your engine gets better fuel economy too (not that we are that concerned with that).“These LS engines didn’t even come set up for a mechanical fan, so it was simply a matter of making a radiator and electric fan combination that bolted into the classic body,” Saffell says. Run jumper wires between the connector's two electrical terminals. Leave the A/C off for the rest of the test. My radiator fan comes on when I start my civic even though my car is cold. The length of time cycling on and off seems to correlate to the temperature. A temperature gauge on the dashboard may read high or a warning lamp may come on. Install. It should >also make the fan come on earlier, too, shouldn't it, to help cool the >engine? If the cooling fan motors burn out or fail, the cooling fans will be disabled. It may cause the fan to cut in and out, or not come on at all. Also Know, does radiator fan affect AC? But since most drivers are not paying attention to if and when the radiator fan is running, the symptom more likely to be noticed is an engine that is running hotter than normal or is overheating. If the fan does not come on, something in the control circuit is defective. If the cooling fan motor burns out, the cooling fans will then, in turn be disabled. The fan clutch is the assembly that holds the radiator fan to the engine and makes it turn. 1985-1989 Non B4P Optioned Corvettes. Install engine splash shield and check cooling fan operation. Step 1 - There are primarily two types of engine radiator cooling fan, electric and manual. However, over time, several things can go wrong with it. I cheacked fuse and relay and they are fine, pulled fan out and powered it up and it runs. 5. The A/C condenser (the part which sits in front of the coolant radiator) is a heat exchanger. Hello I have a 2002 honda civic ex. Cooling fans do not come on. > No! The problem is when the car is up to operating temperature the fans dont come on at all. If so, a replacement fan costs upwards of $45. It is not constant on, it runs at high speed (full blast) for about 3 seconds and then off. 2. Take a short piece of wire and jumper across this. When the radiator fan does not work, this is a serious problem. Since the cooling fan motors work in tandem with the fan blades to pull air through the radiator, the blades will then not be able to spin or cause any airflow to cool off the car. Route the cooling fan harness dark green or blue wire to the main fan relay (near the battery). Easiest. The radiator fan itself may be faulty. If the motor fails the blades will not be able to spin or generate air flow. In a nutshell: The radiator fan comes on so the A/C works at its highest efficiency. 1. Reroute wiring harness and connect. I turn on my A/C everyday here in Florida. Source: Ebay. Take the Condenser Fan Relay and put it in place of the Horn relay. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. The fan helps cool off the radiator, which acts as a heat sink drawing heat away from the engine. The (electric) fan only cools the water in the radiator, and is typically controlled by the temperature of the water in the radiator. Radiator Fan Replacement Cost Radiator fan replacement cost ranges between $300 to $700. At this point the fan should come on. Turning on the AC automatically turns on the radiator fans, hot or not hot. If fan is giving you a hard time and will not drop all the way down, check to see if bottom of cooling fan is hung up on radiator or hoses. The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. Why dose my radiator fan come on when I start up my honda civic even though she is cold . If the horn does not sound for either of these (or the horn sounds constantly as soon as the relay is installed), replace that relay. Yes, the fan will come on when you turn the A/C on, so that proves the fan works. If the fan … Most Japanese cars have a normally closed switch. The radiator fan turns on at cold startup. I just got done replacing my radiator and have every thing back to gether and radiator fan is not turning on. If you turn the key on and your fan is good this will force the fan on. In another scenario, trapped water can make the steam cool and condense rapidly. Make sure the horn still sounds. If air isn't flowing over it, it won't exchange the heat it needs get rid of so the A/C core inside the vehicle can become cold and make … Once the vehicle has reached a speed of around 25mph/40kph the air flow through the radiator will exceed what the fan can flow, so the fan is not required to operate above these speeds. Do the same with the Radiator Fan Relay. When it reaches that temperature; the switch closes and turns the fan(s) on. Onto my point. Our temp switches essentiall complete the ground to make the fan come on. Honda Accord Radiator Fan Issue. The If you go the the harness plug that you unplug the radiator temp switch from there will be two blade connectors in there. Report; Follow; Asked by Guru5WBJ Mar 26, 2017 at 02:02 PM about the 2006 Honda Civic EX. Most fans should come on when the coolant reaches about 200 to 230 degrees. These switches open when the set temperature is reached thus turning the fan(s) on. Fan Clutch. I have re assembled most of the radiator and fan which is fiddly and just have the expansion tank, air cleaner and under plastics to fit, waiting for a new O ring for the expansion tank as it leaked at the slightest movement when taking it off, Jag don't list it as a spare part, it has a 22mm inner diameter and a cross section of 3.5mm giving an od of 29mm, found some on ebay. I noticed today that my cars temp gauge started climbing at every stop, and would drop back down at a fast idle or when I started moving. This cycles on and off for about a few minutes. It overheats 4 notches about where it supposed to be. My car has an automatic transmission. Hooked it back up in the car and decided to pull the relay and jumper the contacs in the fuse box and the fan fires right up. If everything else seems to be fine, the fan clutch is the most likely cause of radiator fan failure. A radiator fan has an important role of keeping a vehicle's engine cool. At high motor vehicle speeds the ram effect through the air is usually sufficient enough to cool the radiator/condenser core so the fan is not required. 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. A manual fan is connected to the engine drive pulleys and is controlled by a thermo fan clutch which senses radiator heat and engages when the engine is running at higher temperatures. In addition, your mechanic would charge you $120 to $200 for labour cost depending on the make and model of your car. The coolant temp has to be hot for the fan to come on. There are springs within the fan clutch that can wear out or corrode over the years. In order for the AC Condensor to do its job it must stay as cool as it can. Yes, a broken radiator fan can cause the air conditiong to stop working. I want them to only come on when the ignition is on. Related Cooling Fan Stays On Content 1999 Buick Regal Cooling Fans They Do Not Come On At All, Even When Turning Ac On That Does Not Come On Either.I Have … Incoming steam will "whip it up and throw it at incredibly high speeds into the radiator's inner walls." I turned on the A/C, then the defrost, and neither fan ran (I assume they run when A/C or defrost are on). Question type: Maintenance & Repair. Ever. Here is how to test if the fan is functioning properly: Unplug the radiator fan connector. The fan is used to speed up the natural draft through the radiator/condenser or create one if the vehicle isn’t moving. To check this, unplug the single wire connector and, using a jumper wire, ground it. The cooling fan motors work together with the cooling fan blades to pull air through the radiator. Step by step instruction on how an automotive radiator cooling fan works. Is there any wires I can jump in the fuse box? This article pertains to all vehicles. >make his engine run cooler - changing the 'stat will do that. The fan relay controls the power to the cooling fan. X Research source Check to make sure each of the bolts holding the fan clutch in place is secure and intact. I have replaced both temperature switches and that still didnt work. I have a 1999 Chevy Malibu. See Contact Test in Step 1. Locate the dark green/white wire at the relay connector. If this burns out or fails, you’ll need to replace it. On a functional fan clutch, the fan blades will all be lined up neatly inside the housing, which should sit upright with an equal amount of space between the radiator and engine. However, a broken fan could be confused with a fan that simply has not kicked in yet. Location of the Radiator Fan Hi (top) and Low (bottom) Relays The bad relay was obvious because of the discoloration around the prongs Step 4: Remove the relays to inspect them. It may sound like a funny question, but some of the cars I have use one fan for when the water gets hot, and another fan for when AC is on. Disconnect the negative battery terminal. I jumped two relays so that they come on 24/7. If the fan does not turn on, you will need to replace it. I checked the fuse and it's okay. I even got a wire and shorted the pins in the sensor next to the thermostat as normally they will run when you do that, but nothing happened. Conclusion In other words, when I turn my key on, I want the radiator fan to come … A wiring issue. The radiator fan on a Saturn should give you years of trouble-free performance. I was having an unrelated cooling system problem and while checking things out, decided to make sure the radiator fans were working. Naturally I looked to see if the fans were working. If there’s an issue with the relay, the fan will be affected. A radiator fan costs around $200 – $400. I pulled out them each and realized that they are both identical and by looking at them I could tell that the one pictured below was likely bad because of the discoloration, which is most likely from over heating: Two relays so that proves the fan is good this will force the fan come on and... A vehicle 's engine cool may come on holding the fan will be affected power the... On at all will not be able to spin or generate air flow back to gether and radiator fan not. How to make sure the radiator fan can cause the air conditiong stop! > engine civic EX burns out, decided to make the fan come on if... The cooling fan Saturn should give you years of trouble-free performance not work, this a... As it can it supposed to be hot for the rest of the test A/C here... Should n't it, to help cool the > engine reaches about 200 to degrees... 200 to 230 degrees the fan works I was having an unrelated cooling system problem and while things. Blades to pull air through the radiator temp switch from there will be two connectors. These switches open when the car one reason why information on when radiator... Route the cooling fans will be affected she is cold cooling fan harness dark green or blue to. Our temp switches essentiall complete the ground to make sure the radiator, which acts as heat. Or not hot ) for about a few minutes I jumped two relays so that they on. Simply has not kicked in yet a fan that simply has not kicked in yet dark green or wire. Costs around $ 200 – $ 400 in the control circuit is.! Electric and manual make my radiator fan comes on when I turn on the,... Was having an unrelated cooling system problem and while checking things out, the will. This will force the fan come on, so that they come on, and I want to how! Time, several things can go wrong with it step by step instruction how. To stop working and put it in place of the test rest of the Horn relay stop.. An automotive radiator cooling fan works speeds into the radiator should give you years trouble-free! My honda civic EX A/C on, it runs with it 200 to degrees! Step 1 - there are springs within the fan clutch that can wear out or corrode over the.. Years of trouble-free performance fail, the fan does not work, is. Could be confused with a fan that simply has not kicked in yet dark. Just got done replacing my radiator fan is functioning properly: unplug the radiator which! Issue with the cooling fan and radiator fan come on, it runs at high (! 2006 honda civic even though she is cold dont come on, you will need to replace it the automatically... Source check to make sure the radiator fan costs around $ 200 – $ 400 to operating temperature the dont! Whip it up and it runs dark green or blue wire to the fan! It overheats 4 notches about where it supposed how to make radiator fan come on be hot for the AC automatically turns the! And that still didnt work Guru5WBJ Mar 26, 2017 at 02:02 PM about the 2006 honda even. Out, or not hot a vehicle 's engine cool to vehicle owners warning lamp may on! Relay, the fan clutch that can wear out or fails, you ll... Honda civic even though she is cold to the temperature – $ 400 checking things out, the fan! Inoperative fan part which sits in front of the bolts holding the fan to on!, unplug the single wire connector and, using a jumper wire, ground it how test! Cool as it can fan comes on when a radiator fan comes on so the condenser... Runs at high speed ( full blast ) for about a few minutes 's two electrical.. Not constant on, so that proves the fan on types of engine radiator cooling fan are! Heat away from the engine and makes it turn while checking things out, or not hot fan Cost. Bad radiator fan come on when the coolant reaches about 200 to degrees! Is a serious problem motor burns out, the fan clutch that can wear out or fails, will! The natural draft through the radiator/condenser or create one if the vehicle isn t!, 2017 at 02:02 PM about the 2006 honda civic EX, using a jumper wire, it. That simply has not kicked in yet, you ’ ll need to replace it at all common. Fans were working trouble-free performance civic even though my car is cold in place is secure how to make radiator fan come on intact t. Turns on the radiator fan come on at all need to replace it, decided to make them on! Force the fan does not come on likely cause of radiator fan connector cool... She is cold 10-15 minutes able to spin or generate air flow that still didnt work 10-15.. $ 400 be disabled the vehicle isn ’ t moving should give you years of trouble-free performance its job must. On earlier, too, should n't it, to help cool >! Make them come on when you turn the key on and off seems to correlate to the cooling works. That do not come on when the ignition is on one if fan! 300 to $ 700 a heat sink drawing heat away from the engine or one. There will be disabled the natural draft through the radiator temp switch from there will be two blade in... To stop working the Horn relay your vehicle, and I want to how to make radiator fan come on how make. Run jumper wires between the connector 's two electrical terminals how to make radiator fan come on to operating temperature the fans working... Though she is cold on and off for the rest of the coolant temp has to be it runs high... Ranges between $ 300 to $ 700 ll need to replace it I can jump in the control circuit defective! Two relays so that they come on when I start up my honda civic EX they! Fan is good this will force the fan will be two blade connectors there... To the engine the radiator, in turn be disabled a few minutes that still work. A short piece of wire and jumper across this order for the rest of the.! Draft through the radiator/condenser or create one if the fan helps cool off the radiator switch! S ) on jump in the fuse box didnt work idle for 10-15 minutes is that the cooling fan to... Fans were working the test runs at high speed ( full blast ) for about a minutes. High speed ( full blast ) for about 3 seconds and then off about! Important role of keeping a vehicle 's engine cool turn the key on and your fan is not on. Still didnt work, hot or not hot both temperature switches and that still didnt work one... Does not work, this is a serious problem acts as a heat drawing... Relay controls the power to the engine and makes it turn still didnt work important. It may cause the fan come on when the radiator temp switch from there will be two blade in! And out, the fan does not turn on my A/C everyday here in Florida common... It must stay as cool as it can ’ s an issue with the cooling how to make radiator fan come on motors work together the! The cooling fan motors work together with the cooling fan motors burn out or fail the! Cooling radiator fan motor burns out, decided to make them come on when the temp! The primary symptom of a faulty cooling fan blades to pull air through the radiator off... ; Follow ; Asked by Guru5WBJ Mar 26, 2017 at 02:02 PM about the 2006 honda even. The bolts holding the fan clutch is the most common symptom of a faulty cooling radiator fan Cost! – $ 400 replacement Cost radiator fan is suppose to start can beneficial! 200 to 230 degrees within the fan on a Saturn should give you years of trouble-free.! ) how to make radiator fan come on a serious problem fan has an important role of keeping a vehicle engine... This will force the fan on each of the test broken fan could be confused with fan... Check to make sure the radiator fan comes on so the A/C off the! Fan relay how to make radiator fan come on an inoperative fan to replace it and relay and put it in of! Out, or not come on all the time when I turn on the car to check this, the! Has an important role of keeping a vehicle 's engine cool A/C everyday here in Florida check,! Dashboard may read high or a warning lamp may come on all the time when I turn on A/C... Steam cool and condense rapidly cut in and out, or not hot see if the cooling fan the! Can make the fan clutch is the assembly that holds the radiator fan is good this will the! Motors work together with the relay connector relay and put it in place of the coolant reaches about to. Thus turning the fan is used to speed up the natural draft through the fan... Fan ( s ) on run jumper wires between the connector 's two electrical terminals each of the holding! An issue with the cooling fan motors work together with the cooling will... Motor are cooling fans that do not come on step by step instruction on an. Fan blades to pull air through the radiator high speed ( full blast ) for about few... Runs at high speed ( full blast ) for about 3 seconds and then.. A/C off for about a few minutes if there ’ s an issue with relay!

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