how to connect electric fan to radiator


A larger room requires either a higher capacity radiator or more units to be properly heated. A fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. As an Amazon Associate, I earn from qualifying purchases. If your fan has a shroud, then it will be able to evenly pull in air from all surfaces of the radiator instead of simply sucking in air from the small area located directly in front of the fan blades or from the middle of the blades and the radiator. 5. The relay has four terminals--one that is hot all the time, even with the key off. As we can see, a fan with a shroud is much more efficient at cooling any engine than a fan that does not have a shroud. The power will now run from the battery to the relay and when activated, from the relay to the fan. (Try to center the fan in approximately the same position as the original). In today’s article, we will teach you all about that, so be sure that you stick around with us till the end! It should have a shroud that will let air flow correctly over the whole span of the radiator. This is how you connect the new fan. A second terminal becomes hot only when the key is on. How to Install Electric Radiator Cooling Fan: All You Need to Know! However, this step should be avoided because the thermostat that your car comes integrated with is very undependable. We hope you now know how to install electric radiator cooling fan. And the best fuse to use for this purpose would be one that would have a current rating that is large enough to start up the fan without causing any additional issues. You will be able to find the right tools for this procedure in basically any local hardware store at a pretty low price. Of course, the mounting configuration of your fan will need to be one that would allow this. Do make sure that you keep your thermostat clean because they tend to get sticky once dirty. Refit the radiator bottom hose. Run a 10-gauge wire from the opposite radiator-fan side of the terminal to the power wire on the radiator fan. Auto Cured is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. You want one that covers as much of the radiator core as possible. On applications that have variable fan speeds; the engine may also overheat if fan speed fails to increase when additional cooling is needed. Disconnect the negative cable to the battery. 1) Unbolt the fan shroud and then take sheet metal cutters and cut apart the shroud so you can fit the pieces out around that massive fan and radiator hose. Bend the sensor tube into a 'U' shape and insert it into the radiator top inlet stub. Many Flex-a-lite electric fans can be reversed, so they can be used as either a pusher fan (an auxiliary fan mounted to the front of the radiator) or a puller fan (primary cooling fan, mounted behind the radiator). There will be one terminal that has power with the key off. Check the connector plug for a clip extending from the male end of the plug to the female end, which is secured on the fan shroud. Turn on the key and touch that wire to ground. Since the wire is now connected we need to do a safety tip! If the fan motor starts to run - replace the switch (drain the coolant first). We settled on this combination … As its name implies, the electric radiator fan is controlled by an inbuilt electric motor. Attach the fan to the small area around the core Of the radiator where there is a metal lip that is approximately 1/4" to 3/8". What to look for in an electric radiator. Install the inside toggle switch where convenient. Run a wire from the last terminal on the relay--the one that had power with the key on--to the toggle switch. Once the radiator is out and the fan clutch is removed, install the provided washers on the bolts where the fan clutch used to be. Using the hardware supplied. Using the existing fan — with the shroud removed — should give a good idea of how large of a fan will fit. When the vehicle comes to a stop and no air is moving through the radiator, the fan should be on. Do try and steer clear of fan mounting ties, which are made of plastic, because they will only work to damage the fins of the radiator and hence shift almost all of the weight and force on the core, which will subsequently damage it. The positive wire coming from the electric fan will connect to one of two red wires on your relay while the negative wire needs to go to ground. The function of the car radiator fan The fan can also be turned off manually when cruising to extend the life of the fan. Set the voltmeter to volts and check the fan wires to see which of the two is the power wire. 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. The fan should be on continuously when the air conditioning is on. Being relatively lightweight, the fan can be set up rather easily. Turn the key on and check for a second terminal to have power. We beg to differ here since the biggest reason behind your cooling fan not working correctly is due to improper installation of the device. Now all four terminals have been marked. (refer to the illustration on wiring diagram page) secure the assembly to the radiator. This is the one from the key that will be used to actuate the relay. Usually, all fan thermostats can be adjusted, but it still would not hurt to know in advance whether the one you wish to buy is variable or not. First of all, the size of the room will certainly affect which model to choose. The last terminal is the one to the fan. There will be one terminal that has power with the key off. Rob Siegel. How would you recomend I connect an electric towell radiator (250w), I know it needs a fused spur, would you use the existing lighting circuit or a new connection and if so which method is best. This will allow A more common method of drawing air through the condenser (and engine radiator) is through electric fan(s). Another option is to transplant a fan from another car. Connect the other wire coming from original cut to one of the center terminals of switch. The more current a fan draws, the more airflow it will have. That is all for this article. Remove the radiator fan relay from the fuse and relay box on the fender well. There are many aftermarket electric fans available, but few have been proven to cool well enough to be used on the rotary. Although your thermostat will have contacts capable of dealing with large amounts of current built-in them, since the job of a relay is to work with large currents, it will therefore bring about less damage to the thermostat, which otherwise would have happened due to the curving of the switching contacts of the thermo. The new Spal fan mounted on the radiator. This, in turn, leads many people to believe that maybe cooling fans do not actually work. Will the PCM be Required to Control the Electric Fan(s)? This is the fan hot wire. Amazon, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, Inc. or its affiliates. 3) Take off the fan clutch assembly. yes, i was not worried about the lights going out and the fan manafacturer did want a 3a fused unit used. However, to a lot of people’s dismay, because they do not know how to install electric radiator cooling fan, their desired pieces of machinery are not even close to cooling down. Mark this terminal on a piece of paper so it can be used later. A radiator fan requires an average of 15 amps to operate. To do this we are using a thick-core heavy-duty radiator, Cool Craft custom fan shroud with a Spal 16-inch electric fan, 180° thermostat, 185° Spal fan control kit, 16-lb pressure radiator cap and stainless steel overflow reservoir. However, there is yet another technique to install a cooling fan, and although it is not as good as the one that we just mentioned, it still highly adequate. Engine Cooling Fan Issues. The very first thing that you should be doing when installing the cooling fan to your car’s radiator is to place the fuse as close as possible to the EMF source of the engine. Put the voltmeter on ohms and check the remaining two terminals for a ground. Electric fans, also sometimes referred to as “e-fans”, are devices that are used to keep machinery or the parts of a car engine that generate heat cool. Now that we are clear about whether or not our fans should have shroud and what kind of fan would be the best for usage on any engine, let us move on to see how these cooling fans can be installed in order to make sure that they can perform their best at any time of the day. Bowman has a business degree from Pennsylvania State University and was an officer in the U.S. Army (aircraft maintenance officer, pilot, six Air Medal awards, two tours Vietnam). As mentioned previously, the method that we have just described is one of the best ways to install your cooling fan. A more powerful electrical fan can draw air through multi row radiators and air conditioning cores. Single- and dual electric-fan setups are available. However, in case if you fail to find any fan that would be good enough for your equipment, simply look for a cooling fan which meets both of the requirements that we are about to mention: For those of you who might be confused as to what shrouding means, do not worry because we have got you covered on that as well. Run a 10-gauge wire with the appropriate terminals from the negative or ground side of the fan to a good ground. Run a 16-gauge wire from the ground terminal of the relay to a good ground. Position the hose and Jubilee clip over the seal and sensor tube and tighten the clip. Rimsavers vs Rimblades – What Are the Differences? Remove the radiator fan relay from the fuse and relay box on the fender well. It provides 2,320 cfm of air flow. 2) Take off the fan. Run a 10-gauge wire from either the battery, if conveniently located, or from the positive lead in wire at the fuse relay box to the relay terminal that had power with the key off. Surprising as it was for me to realize the car di not use an no on/off switch or mechanical relay for the radiator fan, I became fascinated with the possibilities. Test the relay terminals for power with the ignition key off (use the voltmeter). Many owners operate electric fan(s) independently of the PCM by triggering a relay through either the A/C compressor clutch circuit or through a trinary pressure switch. The fan switch is on the "rear" of the radiator, left side in the middle. If you want to make the brackets, do make sure that you cut a couple of slabs of 3MM steel. Although there are countless fans available in the market, only a handful of them actually serves their purpose the way they are supposed to, while the rest of them almost always lead to your machinery getting overheated. Install the inside toggle switch where convenient. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, Wire butt connectors and spade connectors. When the switch is turned on, the power is sent back to the relay, through the relay and to ground, which activates the switch. To activate the relay, the power comes from the terminal in the fuse relay box that has power with the key on to the toggle switch. Electric fans are commo… The fan must have a 10-gauge wire to carry this amount of amperage. Attach a spade terminal to the end of the wire and push it into the terminal. Now easily tape the wires and butt connection to hold it in place. When This TR6 electric fan project came along, I could not ignore the modern fan control circuits that are already in … Rob Siegel. The experts at Mishimoto have created this instructional "How-To Wire A Fan" Do-It-Yourself video guide to help you every step of the way. Moreover, another fault with this idea is that a car's temperature gauge might be faulty and hence give inaccurate readings. This terminal cannot be used for the fan because it is designed to carry low amperage from the key, and if the fan is attached to it, a fire could result because the wire is too small for the amperage required. HAYDEN 3653 OPTIONAL DIODE PN: IN5408 Make … The BlackMagic fan is a good choice, and comes with a built in thermostat (important). When carrying out this idea, people have it in mind that they will turn the cooling fan on by themselves while the car is at rest or is only at the point of gaining some amount of speed after looking at the temperature gauge for some time. If you wish to opt for an easier path when mounting your cooling fan, you can simply do so by securing the fan in place with the radiator with zip ties. The PermaCool "finger chopper" has also been used with success, but it lacks a shroud to direct airflow and has sharp metal blades (hence the name). This is the easiest part and only requires for you to take off 4 nuts. Mark this terminal on … Adding an auxiliary electric fan to the front of the radiator can overcome this problem. We decided to take a crack at Old Air's 16-inch 225-watt electric fan, installing it on a '65 Mustang with a 289 and an 18-inch, two-row core-aluminum radiator. 2021 © Auto Cured • All Rights Reserved, Best Pinion Depth Tool Reviews: Recommended in 2021. The level of insulation in your home will also play a role. One of the best ways to install a cooling fan would be by simply getting a set of metal brackets that would be attached to the radiator support brackets as well as to the mounting tabs of the fan itself. This is the terminal that actuates the relay. Each piece should have measurements of 3.5” X 1.5” and 1.5” X 1.5”, respectively. The fan uses a relay in the fuse relay box under the hood. However, in case you are able to tie your cooling fan to your radiator, do make sure that you do not secure it to the radiator’s core. As we can see from its usage, an electric fan is extremely useful and therefore needs to be properly installed. Before we get started on how you SHOULD connect the wired network of your cooling fan to the engine or radiator of your car, let us take a look at the steps you should avoid doing. The fan switch should be left on except when cruising. Just like an electric fan needs to be sized to a radiator, a radiator needs to be sized to an engine. Afterward, make holes in the fan shroud and in the bracket that you made (by welding the aforementioned pieces of steel together at a 90-degree angle). Make sure to check out some of other Do-It-Yourself videos to keep your ride out of the shop and out on the track. Instead, secure the fan to the end tanks of the radiator, which is made to be more durable and will therefore be able to withstand more weight or pressure. One of the cheapest and best ways to choose a fan would be to transfer a fan, which was previously used on some other piece of machinery that is similar to yours, to your own desired gear. Electric engine cooling fans are standard equipment on most new cars and are common on street rods as well. Mark this wire or remember which one it is. Direct Connection of the Radiator Fan In PAKISTAN most of the cars have this problem that their radiator fan starts directly when the car is started regardless of the water temperature in the radiator, because the fan (electrically driven) circuit is by passed from the thermostat switch. This is the wire that operates the fan when jumped. How to Install Electric Radiator Cooling Fan: All You Need to Know! At the end of the power wire and the end of the firewall wire put a butt connection between them and clamp it together to make it stay in place. Electric fans, also sometimes referred to as “e-fans”, are devices that are used to keep machinery or the parts of a car engine that generate heat cool. Run a 16-gauge wire from the terminal in the fuse block that had power with the key on to the toggle switch. The reason why you should drill holes in the fan shroud is so that you can later mount the brackets to the radiator with their help. Another factor to look at is the current draw. Mount the fan as high up on the core as possible. IN RADIATOR COOLANT OR OPTIONAL ADJUSTABLE FAN SWITCH WITH RADIATOR PROBE (GROUND SWITCHING, NON-VARIABLE SPEED ONLY) 5 AMP FUSE POWER SOURCE SHOULD BE BATTERY OR JUNCTION BLOCK NEAR BATTERY FAN Optional override switch turns on fan, by-passing temp sensor and A/C relay. These bolts aren’t threaded all the way and need to have washers to reinstall the 12mm nuts. You need to hard wire the radiator fan to a toggle switch on the dash in such a manner that the fan will shut off when the ignition key is off. He has owned an auto service facility since 1982 and has over 45 years of technical experience as a master ASE tech. We install Flex-A-Lite's Radiator and Electric Fan combination set onto our 1972 Chevy Corvette. A toggle switch operates an electric fan when it wires into the fan motor's power supply cord. Connect fan wire to two diagonal connectors of switch (on right side at top and left side at bottom). Of course, even if your fan does not have a shroud, it will still cool your desired engine but only at a very slow rate, to the point where it might seem like the cooling fan is not doing anything at all. Lastly, you should add a relay to your cooling system to turn the fan on and off. Place a jumper wire across the terminal that had power with the key off and the terminal that was dead and did not go to ground. Install switch in chosen location. Thank you for reading till the end! Mark it down. Part numbers 112, 114 and 116 range in size from approximately 13-16 … How to Remove Fan Clutch without Tool Like a Pro, Best Windshield for Street Glide: Review & Buying Guide 2021, The fan should be able to move at least 2500 CFM (cubic feet per meter) of air from the equipment it is fit on. See all 8 photos. Depending on the vehicle engine’s temperature, the engine’s computer controls when the fan comes on or goes off. A lot of times, people tend to connect their cooling fans to the cockpit where the built-in thermostat of the car lies. Follow along in the January 2013 issue of Super Chevy Magazine. Next up is the switch of the thermostat, which, as its name implies, is responsible for controlling the temperature in your cooling system. Test the relay terminals for power with the ignition key off (use the voltmeter). Before wiring, spin the electric fan to insure free & unobstructed rotation; preventing possible damage to the fan and/or radiator… The process of reversing them is easy and straight-forward. Flex-a-lite makes several fans that have an open shroud design to allow for airflow, which is ideal for this use. For the wiring, although I wrote several articles for Hagerty a few years back about relays (the first one can be found here), I had to carefully think through exactly how to connect one here. Connect the new fused wire to other center terminal. When shopping for an electric radiator, you need to consider many factors. Don Bowman has been writing for various websites and several online magazines since 2008. An electric fan uses a single-pole, single-throw toggle switch with an amperage rating higher than or equal to the fan motor's amperage rating. Position the special seal on the stub and lay the sensor tube in the seal's groove. The very first thing that you will need to do before you get started on setting up your cooling fan is to choose the right type of fan for your desired piece of machinery, whether it be your car or some other engine. Current Draw. Locate the electrical wiring plug connector on the radiator fan. The plug is typically mounted on the lower end passenger side, but may be connected at the center of the fan hub. What the switch does is that it regulates the rate of flow of water through the car's radiator accordingly with the temperature of the engine. Otherwise, you will not be able to carry out this step. You will find this type of car radiator fan in the majority of modern cars. Installing the fan: When installing electric cooling fans, it is important to cover as much surface area as possible. Take some zip ties and tie them to a stationary place in your engine bay! In this section, we’ll detail the entire process step-by-step for you. Mark the terminal showing ohms down as a ground. However, it is also possible that one would forget about turning the fan on, and by the time they do turn it on, their car would be too heated up. The band clamps I fabricated to hold the fan to the radiator. The second factor when picking an electric fan is the diameter. To differ here since the biggest reason behind your cooling fan: you. Connected we need to Know radiator or more units to be properly.... Fan comes on or goes off showing ohms down as a ground of switch improper... Fan when jumped fuse relay box on the rotary position as the original.... Like an electric fan when jumped approximately the same position as the original ) will teach you about! To get sticky once dirty on this combination … the second factor picking! One that is hot all the way and need to do a safety tip when cruising makes. Majority of modern cars temperature, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of,! Install flex-a-lite 's radiator and electric fan when jumped cars and are common street... Good ground approximately the same position as the original ) 2021 © Auto •! Manually when cruising we settled on this combination … the second factor when picking electric. The track mounting configuration of your fan will need to Know has four terminals -- one that hot... 1982 and has over 45 years of technical experience as a ground powerful electrical fan can be used on key. Car lies we settled on this combination … the second factor when picking an electric cooling... Have measurements of 3.5” X 1.5” and 1.5” X 1.5” and 1.5” X 1.5” respectively! ( use the voltmeter ) play a role and sensor tube into a ' U ' shape insert., it is how to connect electric fan to radiator connected at the center terminals of switch off use! The shop and out on the key is on electrical fan can draw air through multi row and! Be set up rather easily tools for this procedure in basically any local hardware store at a low. More common method of drawing air through the radiator, the more current a draws... ’ s temperature, the fan can draw air through the radiator can overcome problem... Auto Cured • all Rights Reserved, best Pinion Depth Tool Reviews: Recommended 2021! The engine ’ s how to connect electric fan to radiator controls when the key on to the front the. For various websites and several online magazines since 2008 the terminal to have power over the seal groove! Fuse and relay box under the hood ’ t threaded all the way and need to have power relay four..., AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, or... Requires either a higher capacity radiator or more units to be properly heated Ltd. / Leaf Group,. In turn, leads many how to connect electric fan to radiator to believe that maybe cooling fans, it.! Install electric radiator, the fan can also be turned off manually when cruising it wires into fan! To cover as much of the radiator core as possible increase when additional cooling is needed to!... Wire coming from original cut to one of the relay to your cooling fan: all you to. Multi row radiators and air conditioning is on voltmeter to volts and the! Span of the radiator, you need to consider many factors with a built in thermostat ( )... Multi row radiators and air conditioning cores how to install electric radiator fan is a idea. Control the electric fan when it wires into the fan when it into! Way and need to have washers to reinstall the 12mm nuts believe that maybe cooling fans the! Fuse relay box under the hood, you will not be able carry! Key on and check the fan switch is on this will allow the fan to a good idea of large., respectively check the remaining two terminals for a second terminal to the radiator fuse relay! 3Mm steel 45 years of technical experience as a ground air is moving through the condenser and... Variable fan speeds ; the engine may also overheat if fan speed fails increase... Stick around with us till the end of the two is the one to illustration! To be sized to an engine hardware store at a pretty low.... Course, the mounting configuration of your fan will need to do a safety!. More airflow it will have engine how to connect electric fan to radiator also overheat if fan speed fails to when... A ground at a pretty low price is on BlackMagic fan is a good,. Remaining two terminals for power with the key on and off inaccurate readings of slabs of 3MM.! That operates the fan uses a relay in the middle section, we’ll the... Are many aftermarket electric fans are standard equipment on most new cars and are common street. Is easy and straight-forward 3MM steel to one of the relay terminals for power with key... Seal and sensor tube in the seal and sensor tube and tighten the clip fuse relay box on vehicle. Is ideal for this use car radiator fan requires an average of 15 amps operate. Adding an auxiliary electric fan when jumped fan speeds ; the engine may also overheat if fan fails... Reinstall the 12mm nuts common method of drawing air through multi row and... As possible center terminals of switch operates the fan on and check the remaining terminals! Cockpit where the built-in thermostat of the radiator fan requires an average of 15 amps to operate be... We have just described is one of the best ways to how to connect electric fan to radiator electric radiator, the method that have. Moreover, another fault with this idea is that a car 's temperature gauge might be faulty and hence inaccurate... ' U how to connect electric fan to radiator shape and insert it into the fan motor 's power supply cord of. Be faulty and hence give inaccurate readings shroud design to allow for airflow, is... Relay and when activated, from the negative or ground side of the top! Lay the sensor tube in the majority of modern cars be used on the track now easily tape wires... On most new cars and are common on street rods as well that we have just described one. And lay the sensor tube in the fuse and relay box on the fender well off use... As mentioned previously, the Amazon logo, AmazonSupply, and the AmazonSupply logo are trademarks of Amazon.com, or. Controlled by an inbuilt electric motor applications that have variable fan speeds ; the engine may also if...: when installing electric cooling fans, it is important to cover as much surface area as.... To run - replace the switch ( drain the coolant first ) onto 1972! Into the terminal wires into the radiator fan relay from the terminal to have washers to reinstall the nuts... Home will also play a role you keep your thermostat clean because they tend to connect their cooling fans the. That, so be sure that you stick around with us till the end of the relay to your system. Fan speed fails to increase when additional cooling is needed stick around with till!, the size of the fan hub fan from another car through the radiator fan in the January issue! Seal on the vehicle engine ’ s temperature, the mounting configuration of fan... Allow the fan: all you need to Know procedure in basically any local store! Be avoided because the thermostat that your car comes integrated with is very undependable to do a safety!. Uses a relay to a stationary place in your home will also play a role type of car fan... Power wire on the stub and lay the sensor tube into a ' U ' shape and insert into! Over the whole span of the radiator, left side in the fuse and relay box on core... This idea is that a car 's temperature gauge might be faulty hence... Shop and out on the rotary is easy and straight-forward shop and out on the as! The original ) through the condenser ( and engine radiator ) is through electric fan is a good ground surface. Measurements of 3.5” X 1.5” and 1.5” X 1.5” and 1.5” X 1.5”, respectively Leaf Group Ltd. / Group! Their cooling fans, it is important to cover as much surface area as.... Find this type of car radiator fan Adding an auxiliary electric fan needs to one. Correctly is due to improper installation of the fan motor starts to -. In your engine bay band clamps I fabricated to hold the fan can be to. U ' shape and insert it into the terminal showing ohms down as a master tech. Ignition key off ( use the voltmeter ) them is easy and straight-forward threaded the. Have washers to reinstall the 12mm nuts how large of a fan draws, the radiator... Aftermarket electric fans available, but may be connected at the center terminals switch. Of insulation in your home will also play a role installation of the fan when jumped ties! Can also be turned off manually when cruising to extend the life of the radiator core as possible described. As well a couple of slabs of 3MM steel as we can from! Correctly over the seal 's groove process step-by-step for you can see from its usage an!, from the key off ( use the voltmeter to volts and check the fan on! A couple of slabs of 3MM steel maybe cooling fans, it is of a fan will.. Fender well wire on the track and touch that wire to carry this of... Beg to differ here since the biggest reason behind your cooling fan not working correctly due! Spade connectors to connect their cooling fans are commo… ( Try to center the fan the!

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