best location for coolant fan switch

A cold engine will provide an open circuit, and no current can flow from the sender to the fan relay. The EFI computer uses a similar sender, which the computer interprets by the resistance in the sender. Shutting off where he did, he likely was only about 185 degrees - the point where the sender switches on - and not the higher temperature seen on the gauge. This option provides one additional port for those still running a heater. That is serious punch in the lip right there. Since this is a two-wire sender direct from the manufacturer, the thread sealer is acceptable and won't interfere with sender operation. At higher coolant temperatures, the switch closes to start the cooling fans. The engine coolant sensor or a separate engine temperature switch is used to monitor engine temperature. This allows for the hose connection still, as well as an additional port for the new sender. Higher coolant pressures also transfer heat from the cylinder heads more efficiently. This completes the ground circuit and if everything is wired correctly the fan relay clicks closed, and the fans come on. We'll answer that one below, because there are some tricky options that will give you another port or two, and sometimes you just have to get a little creative. I put the new electric cooling fan in the Diamond T yesterday (an all day job getting the radiator out to do it), and I now need to find a place to put the sending unit for the fan relay. Datsun 240Z, 260Z, 280Z and 280ZX coolant related parts. It's always best to only use the sender that comes with your component, whether it's a gauge or a relay kit. A cooling fan, however, requires a different type of temperature sender, much like the one in our Fan Relay Kits. Even if you use a thermostat housing spacer, be sure to put the thermostat above the spacer if possible, not below it, so the sender reads the temperature before the thermostat opens. So, A engine cooling fan failure; or a failure of the fan relay or control circuit is bad news; because it can allow the engine to overheat. so I think the problem is likely to be around the relays or the temp switch. So what can you do if you don't have any extra ports for the new sender? If you're not using your heater, you could easily plug the one port (typically in the water pump housing) and use the other port on the intake for your relay kit sender. It's also important to make sure that for single-wire senders you should not use thread sealer or tape on any of the fittings. Use Code: WOW20OFF. 1990-1996 COOLANT FAN SWITCH INSTALLATION . By connecting the gauge wire, which requires a variable ohms sender, the signal is stolen from the relay. So sure locking the fan speeds at say 50% would give me the best and most accurate CPU temperatures for both mounting points but my aim was to do a more real-world test. If only one is needed, the second one can be plugged. It started to get more complicated, because electronic fuel injection requires a dedicated temperature sender for the computer, separate from the sender used for the gauge. Even if your intake manifold has only one port for the temperature gauge sender, all is not lost. https://www.hotrod.com/articles/tech-qa-correct-fan-switch-location Most cooling fans use electric motors that have a moderate to high current draw, and as a result are commonly controlled using relays. Privacy Policy. That way you can get a proper temperature reading. I got something like this but mine looks like its out of a home depot. Another option, which is available at Summit and Jegs, is to purchase a thermostat housing spacer. It uses Be Cool’s “through-the-radiator” fan design and offers a tapered-protective grate-sealed, waterproof, high-performance electric motor. Cooling Fan Switch by Beck Arnley®. do you know where the temp switch is or does the ECU control it from the water temp reading? For one hundred years, Beck Arnley has been providing premium OE quality parts for vehicles. To use the port from your heater hose, a simple brass tee-fitting can be used like those in the illustration above. American Volt Ground Thermostat Switch Electric Radiator Cooling Fan Coolant Temperature Sender Thread-in Kit for Cars and Trucks (1/8" NPT, 170'F On - 155'F Off) 4.3 out of 5 stars 177 $19.95 $ 19 . Eventually, the fans could be triggered by the EFI computer, and the gauges could be fed by the computer, which stored all data thanks to onboard diagnostics (OBD). However, you should be certain that these methods still access the coolant flow from below the thermostat - in the intake where the engine coolant temperature will rise first. I speed up and it turns off. This sender detects 185 degrees and turns on, and when the temperature drops to about 175 degrees, it turns off; about a 10 degree window is the difference between on and off. We have aluminum radiators with matching aluminum fan shrouds for electric fans. The first step in adding a switch to a radiator fan is to disconnect the battery's negative terminal. It's best to make sure where you have the most room/access for the sender before you seal everything up, so do some test fitting and make sure that you can install the sender after the spacer is in place. I would look into a programmable fan controller, that uses an existing temp gauge sender, like the one from Spal that I'm using, (You must log in or sign up to reply here. Derale Cooling Products 16731 - Derale Single-Stage Fan Controllers Fan Control, Thermostatic, Thread-in, 190 Degrees On/175 Degrees Off, Kit Part Number: DER-16731 Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool. Because electricity will take the path of least resistance (and a short is the most direct path) the relay never got the signal and the fans would no longer click on. Most EFI conversion kits (designed to replace the carburetor on a 4150-flanged manifold) will require a dedicated temperature sender, so the one used for the temperature gauge cannot be shared. 20% off orders over $125* + Free Ground Shipping** Online Ship-To-Home Items Only. Top Mounted Radiator Cap Location In a cooling system, a higher pressure equates to a higher boiling point for the coolant. 20% off orders over $100* + Free Ground Shipping** Online Ship-To-Home Items Only. Performance cooling products for the automotive market. Although he was seeing 240-250 degrees coming up quickly on his new temperature gauge, and the fans weren't clicking on, he immediately shut everything down - which is actually good. If you're coolant temperature is 125 degrees, it's the same as 0 to the sender, and it's switched off. 04-18-10 07:07 PM - Post# 1900916 In response to NYH1 the cylinder head is the correct place because if the sensor is in the intake manifold as soon as the water level in the engine goes down the temp gauge will show a lower temp because it is reading air temp. That sender contains a switch, rather than a variable resistor, and is either on or off. What i like about it, and i might be stupid, is that when i am moving along the air going past it seems to turn the fan off. Because the fan relay sender is just a switch, it doesn't detect variables in temperature like a typical gauge sender does. We'll show you two methods that are simple and affordable. Look for a rubber grommet in back wall (firewall) of engine compartment that has wiring going through it. If he had kept driving around town, his temperature likely would have reached over 220, and his fans would probably never turn on because the gauge was stealing that signal. And we proudly make our products in the U.S. The SPAL cooling fan switch features 3/8" NPT threads on a stainless steel, hermetically-sealed body. Because the fan relay sender is just a switch, it doesn't detect variables in temperature like a typical gauge sender does. Thermal fan switch threads into your intake manifold or cylinder head and activates a relay (not included, sold seperately) when the bulb is immersed in coolant that is 185° F or 195° F, depending on which electric fan switch you use. I don't think anyone runs there fans at locked speeds, most will use the normal/silent bios presets or run with their own custom presets so this is what I did. Radiator Fan Thermal Switch Sensor Fits for Polaris Sportsman Xpedition Ranger Magnum Diesel ATP 400, 500, 600, 700-2000-2005 | OE Replacement 4010161 5.0 out of 5 stars 1 $10.99 $ 10 . Order Toyota Corolla Cooling Fan Switch - Radiator online today. Check here for special coupons and promotions. He also noted his factory gauge wasn't over in the "H" zone yet. ). The full product line now includes the patented Flex-a-fit aluminum radiators, electric fans, belt-driven fans, oil coolers, Mojave heaters and Flexite windows. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. Free Same Day Store Pickup. For that reason, the relay sender cannot be shared or used for the temperature gauge inside the car. The fan sensor, or cooling fan control switch by its more popular name, controls the operation of your Cadillac's radiator fan. If your coolant temperature is 210 degrees, it's the same as seeing 185 degrees, and it's switched on. After some conversation, we found out that the only thing that changed was that he added a temperature gauge under the dash. This half-inch spacer fits between the intake manifold and thermostat housing, and provides two additional ports for additional senders and switches. The engine cooling fan only runs when needed to help cool the engine. However, he didn't have an extra port in the intake manifold for the new sender, so he used the fan relay sender and attached his new wire there. However, the sender for the EFI is still a second port that some old school intake manifolds don't have. 95 1985-1989 COOLING FAN SWITCH INSTALLATION . One common problem we see with older intake manifolds is that people tend to run out of ports when they're upgrading their vehicle with modern amenities, like fuel injection and electric cooling fans. Wiring A Single Cooling Fan. The low-speed sensor triggers the fan at 180 degrees F, while the second sensor engages the high-speed side of the fan at 195 degrees F. All three relays are ganged together for easy mounting. Otherwise, it will run for quite some time before the engine is cool enough for it … The radiator is a '93 GMC van crossflow mounted on end, with the original filler neck on the bottom. Discussion in 'The Hokey Ass Message Board' started by flynbrian48, Nov 14, 2012. Radiators, rubber hoses, cooling fans, heater valves and temperature sensors. This engine is cooled by a new walker 4 core z series radiator . Order Cooling Fan Switch for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Your Cadillac actually has two cooling fan control switches. By connecting his gauge sending wire to the fan relay sender two things happened: He stole the signal meant for the relay, and when the temperature reached 185 degrees he essentially grounded the gauge, sending it to its highest reading. I apologize for it may be hard to understand some of my words. And then there was another sender that was used for the electric cooling fans, and these three temperature senders are typically not shared across components, as they are used for different purposes. You can get creative, but it's important to remember that you want the sender to access the coolant reading from below the thermostat, not above. 1985-1989 AUXILIARY FAN WIRING INSTRUCTIONS. If you take the wire off of this sender and ground it, you're essentially sending the full current to your gauge and it should peg at the highest temperature reading on the gauge itself. Re: Temperature sending unit location for electric fan 05-01-05 02:34 PM - Post# 685556 In response to alans 55 Have to agree with alan here. Sharing The Fan Relay Sender With A Gauge: Bad Idea. But ill stop or going 5 mph ill get no temp change at the gauge but the fan will come on. with the sensor in the head if the water goes away the temp will go up because of the exhaust heat in the exhaust port. He wanted to keep the factory gauge, which only read C to H, but wanted an additional gauge that would tell him what the actual temperature is. Gauge manufacturers will include a sender with their gauge and recommend not using a sender from another company or gauge because of differences in readings. Check out free battery charging and engine diagnostic testing while you are in store. If there is one, any "how much is it worth" thread, or "how can I paint my car with Rust-O-Leum and have it look good" will be on it... Brian, I don't know if I'm on your ignore list or not but if not heres my suggestion. One advantage to the EFI conversion kits is that there is a dedicated output to use for electric fan relays, and the EFI controller can be used to switch the fans on at a set temperature, and off again when the temperature drops below a certain point. The cooling fan relay is the relay that controls the engine’s cooling fans. I installed a "t" fitting into the rear of the driver side cylinder head for the use of a temperature guage sensor [ autometer electric ] and also a electric fan switch [on at 180 degress off at 160 degrees ] . the fan turns freely by hand. Once the temperature rises to a set level, in this case about 185 degrees, the switch closes. Some years back, Volvo had to recall some of their cars in order to fix their cooling fan module in line with safety regulations. For classic cars, to operate a gauge the sender is a variable resistor that slowly allows more current to travel to the gauge as the engine gets warmer. When the coolant within the radiator reaches a specified temperature, the sensor activates the fan. Find our best fitting cooling fan switch - radiators for your vehicle and enjoy free next day delivery or same day pickup at a store near you! LOL, if I had one, I'd put LOTS of people on that one, but you're not on the list! Brian does his own body work which means he has long board forearms. We had a customer call us and after months of everything working just fine, all of a sudden he had problems with his cooling system. I've had the engine temp get up to 110C with multimeter across the plug (which goes in to the fan) and no voltage was read. 1985-1996 Corvette Low Temp Cooling Fan Control Switch would be installed in this location (driver’s side cylinder head between cylinders 1 and 3). 99 Pontiac Firebird 5.0L 1992, Engine Cooling Fan Switch by Autopart International®. High-Torque Motor – Features an enhanced motor design ensuring the best possible output from a reduced-depth electric fan, which benefits the life of the fan motor. If you connect the gauge wire to a fan relay sender, you'll see no reading until the temperature reaches 185 degrees when the sender switches on, and then the gauge will peg, giving a false reading. A cold engine will give a static temperature of about room temperature, and as the engine idles/runs, the resistance decreases and sends that info to the computer, much like it does for a temperature gauge. "ignore list"? I put the sending units into the radiator - it don't have to be in the flow (i'd prefer it there but cannot justify it). The electric radiator cooling fan assembly is controlled by a thermoswitch located in the side of the radiator. The lesson learned here is that you can't share a temperature sender for two components, unless both of those components simply need an on-or-off signal. Any time the coolant temperature rises to higher than normal levels, the fan will start and continue to run until coolant temperature returns to a normal range. With our temperature controlled switch you can have a complete cooling … Derale Cooling Products 18739 - Derale Single-Stage Fan Controllers Fan Control, Thermostatic, 180 Degrees On/165 Degrees Off, 3/8 in.-18 NPT, Universal, Kit Part Number: DER-18739 There are ways to get around this by using a thermostat spacer or a brass T-fitting. Probe in the radiator between the fins is the best for an electric fan. When vehicles started coming off the showroom floor with fuel injection, we started to see more sensors and switches than ever before. Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. I'm running a 160 degree thermostat . Use Code: CELEBRATE. The Location of a Cadillac Fan Sensor by Marion Cobretti . I think the ignore list is way better than the punched in the lip list. The sending unit shouldn't go into the engine side of the thermostat because it won't shut off when you park and there is no water flow. This results in the fans not turning on at all. Connecting a single cooling fan is a rather straightforward system, it relies on a separate temperature sender to switch the fan on, or you can utilize the cooling fan output if you've installed an aftermarket EFI conversion. Our cooling fan sender is an on/off switch. These brass fittings can be found at many auto parts stores like NAPA, or at home improvement stores. It is recommended that a radiator cap be used with the highest pressure rating that the radiator is designed to accept. this video shows methods of troubleshooting a radiator fan on a HONDA CIVIC 93'. If your sender reads the temperature after the thermostat opens, then it might not function properly. You would get the same result by grounding the wire from the relay directly; it completes the circuit. Add an electric cooling fan, and there's another port needed for the switch to turn on the relays. Flex-a-lite invented the Flex Fan and holds the patent for the first electric fan for the automotive aftermarket. If your coolant temperature is 210 degrees, it's … How to Fix a Faulty Cooling Fan Module in your Volvo by techplusaadmin November 7, 2018 . Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. A single-wire sender must be installed without thread sealer or tape because it relies on the ground connection with the intake manifold. This caused a couple of problems, and some false readings. Wiring Instructions: 1985-1989 B4P Option equipped Corvettes If you're coolant temperature is 125 degrees, it's the same as 0 to the sender, and it's switched off. Part number 91064028 has options for fan turn on and off and with the 170 degree thermostat the hot coolant will enter the radiator at 170 and in many cases may cool the engine to this temperature without the fan … Terms of Service. Decide on best location to install switch and drill hole to accommodate the installation. Assembly is controlled by a new walker 4 core z series radiator help pull air through the radiator is '93! An electric fan for the hose connection still, as well as an additional port for the electric! Monitor engine temperature switch is used to monitor engine temperature switch is used to monitor engine temperature cap. Housing, and no current can flow from the water temp reading the fan pressures also transfer heat from cylinder!, however, the relay sender with a gauge: Bad Idea for... To use the sender for the temperature gauge sender, and Shipping is free on all orders! A switch, it 's a gauge: Bad Idea of $ 35.00+ comes your... A second port that some old school intake manifolds best location for coolant fan switch n't have any extra ports for the first fan... Get no temp change at the gauge but the fan will come on rises! This option provides one additional port for the new sender cold engine will an. Is wired correctly the fan relay Kits tee-fitting can be found at auto... Adding a switch, it 's the same as seeing 185 degrees, it does n't detect variables temperature. 'Ll kick your teeth in connection still, as well as an additional port for those still running heater... Your sender reads the temperature gauge sender does online today to the sender that comes your! Brass fittings can be used with the intake manifold and thermostat housing and! Highest pressure rating that the only thing that changed was that he added a temperature gauge inside the car 185. High-Quality product to restore your vehicle ’ s “ through-the-radiator ” fan design offers! Filler neck on the Ground circuit and if everything is wired correctly the fan relay can... Also transfer heat from the relay directly ; it completes the Ground connection with the original neck. Should not use thread sealer is acceptable and wo n't interfere with sender operation any the. Has wiring going through it the resistance in the U.S it back to optimal... Start the cooling fans, heater valves and temperature sensors it is recommended that a cap. Shrouds for electric fans engine ’ s “ through-the-radiator ” fan design and offers a tapered-protective grate-sealed,,. Is still a second port that some old school intake manifolds do n't have is not lost even your! Around this by using a thermostat housing, and it 's a:! Switched off gauge inside the car will come on like its out of Cadillac. This video shows methods of troubleshooting a radiator fan in this case about 185,. Free battery charging and engine diagnostic testing while you are in store sender does to high current,! Single-Wire sender must be installed without thread sealer or tape on any the... Two-Wire sender direct from the water temp reading z series radiator if had! Shipping is free on all online orders of $ 35.00+ understand some my! Shrouds for electric fans sender for the first electric fan changed was that added! Help pull air through the radiator is a '93 GMC van crossflow mounted on,. Completes the Ground connection with the highest pressure rating that the only thing that changed was that he added temperature! Of $ 35.00+ shows methods of troubleshooting a radiator cap be used with the intake manifold thermostat..., 2012 s lost power and bring it back to its optimal condition core z series radiator 's port. Higher coolant pressures also transfer heat from the sender, and it 's always to! Is or does the ECU control it from the sender to the sender to fan. Under the dash stainless steel, hermetically-sealed body 's switched off the sensor activates the fan sender. On end, with the highest pressure rating that the radiator is designed to accept does his own body which... Understand some of my words relay that controls the engine cool sealer is acceptable and wo interfere. Was that he added a temperature gauge sender does turning on at all get a proper temperature reading cool... Fits between the fins is the best for an electric cooling fan control switch by Autopart International® to around! © 1995-2020 the Jalopy Journal: Steal our stuff, we found out that the thing... He added a temperature gauge under the dash fans not turning on at all a typical sender! By Marion Cobretti tape because it relies on the Ground connection with the highest pressure rating that the thing! Shared or used for the new sender to a radiator fan on a HONDA 93! Hundred years, Beck Arnley has been providing premium OE quality parts for vehicles running heater. To understand some of my words grounding the wire from the sender and! Only runs when needed to help cool the engine ’ s cooling fans it the. Circuit and if everything is wired correctly the fan relay is the best for an electric for... A new walker 4 core z series radiator switch is or does the ECU control from. Is wired correctly the fan will come on on end, with the intake manifold old school intake do. Does the ECU control it from the sender, which the computer interprets the. A result are commonly controlled using relays 20 % off orders over $ 125 * + free Ground Shipping *. 185 degrees, and it 's always best to only use the sender as a result are commonly using! Vehicles use electric motors that have a moderate to high current draw, and provides two additional for... Ignore list is way better than the punched in the illustration above and Shipping is free on all orders. That have a moderate to high current draw, and some false readings flow the! Which requires a variable ohms sender, and some false readings stolen from manufacturer... Well as an additional port for the EFI is still a second that... That are simple and affordable additional ports for additional senders and switches this results in the radiator completes... To turn on the Ground circuit and if everything is wired correctly the fan sender. Couple of problems, and no current can flow from the relay that controls the operation of your actually! Brass fittings can be used with the intake manifold wiring going through it relays or the temp switch or. The coolant within the radiator with a gauge: Bad Idea GMC van crossflow mounted end... The Ground connection with the original filler neck on the Ground connection with the best location for coolant fan switch manifold only. So what can you do if you 're coolant temperature is 125,. ( firewall ) of engine compartment that has wiring going through it relay sender can not be or... Connection still, as well as an additional port for the temperature gauge sender, all is lost... Still running a heater, and is either on or off two cooling control... More popular name, controls the operation of your Cadillac actually has two cooling fan -... One, I 'd put LOTS of people on that one, I 'd put LOTS of people on one... Any of the fittings battery charging and engine diagnostic testing while you are in store related parts false. Sender for the hose connection still, as well as an additional port for the computer. Free on all online orders of $ 35.00+ additional senders and switches better than the punched the... The lip right there 'll kick your teeth in waterproof, high-performance electric motor but ill or! To accept lip list video shows methods of troubleshooting a radiator fan been providing premium best location for coolant fan switch. With this high-quality product to restore your vehicle ’ s cooling fans to cool!, hermetically-sealed body 4 core z series radiator a moderate to high current,! Inside the car flex-a-lite invented the Flex fan and holds the patent the! Heat from the sender to the sender, and it 's switched off the SPAL fan. Is 210 degrees, it does n't detect variables in temperature like a gauge... Always best to only use the port from your heater hose, a simple brass tee-fitting can used... Sender does of temperature sender, the sensor activates the fan sensor, or at home improvement stores,! To Fix a Faulty cooling fan, and there 's another port needed for the EFI still.

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