Universal Radiator Fan Switches

Vehicles need cooling fans to transfer heat just the way humans’ call for a cooler to get off the heat throughout summer season season. This may possibly sound like a key benefit, but any time you repair a radiator, you decrease its potential to cool. We can supply a wide range of quality SPAL axial cooling fans , centrifugal blowers and associated accessories at competitive costs all available with worldwide delivery. Electric radiator fans are accessible in each pusher and puller styles. Call Kirk’s Auto Care in Livonia, MI, at 734-402-8722 to discuss your radiator fan issues. However, when I drove the automobile to the Lotus Owner’s Gathering (LOG) in August, in spite of my possessing installed a switch to directly turn on the fan and not rely on the temperature sensor, the vehicle overheated in dramatic style while I was waiting in the queue to get into the concour, held at Thompson Motor Speedway in Connecticut. Heat transfer from the radiator to the condenser can alter efficiency, if the vehicle is overheating. To enhance air flow through the radiator – in an effect to get much more cooling power out of your rad method a fan draws air by way of the fins or tubes on the radiator itself. To do this preserve the radiator cap open, start off the vehicle, and put the heat on max. A radiator fan is hence utilized to preserve the temperature of the coolant in check. Radiators in North Hollywood automobiles nonetheless face a danger of experiencing meltdown, even despite the relatively reduce temperatures of fall and winter. These radiators were not as sturdy as modern radiators, nor did they cool as nicely as modern day radiators. The GTs just have a unique fan blade that seems to bury almost all air sort noises into the radiator which is excellent, but it also tends to have a little bit of bearing whine and the motor noise is present probably a bit much more than other fans. This report aims to give clear info and details to assist you decide on the electric heating item that greatest matches your exclusive life-style and heating requirements. Nevertheless, frequent overheating episodes are indicators that there is anything incorrect with your cooling method. We checked to be specific the front-mounted radiator fan was spinning the correct way. The radiator transfers the heat from the fluid inside to the air outdoors, thereby cooling the fluid, which in turn cools the engine. Auxiliary fan assemblies improve the circulation of cool air into the car’s cooling technique, specifically at instances when the automobile is stopped. This way, the second rad acted as an Airbreak” in front of the fans and I could see how considerably of an impact this would have on temperatures. As the heated coolant moves from the engine block to the radiator, it gets cooled since of the aluminum physique of the radiator that dissipates the heat. Ahead of coolant was employed, water was poured into radiators. Radiators first used downward vertical flow, driven solely by a thermosyphon impact. It should open and permit coolant to pass when the engine is adequately heated. 12. Bleed the cooling technique to guarantee that all air pockets are removed. There are also mesh designs of fan guard for your electronics or cabinet cooling fan, which can be helpful too depending on your distinct demands. RadFan functions a little differently simply because it blows the warm hair horizontally into the room, with the aim to avoid it cooling as the air passes over the cold window. The engine delivers energy to run the car but it is the radiator that maintains the well being of the engine. I cannot comment on actual efficiency functionality, it would take months of testing, but as far as heating functionality goes, there is certainly an improvement. Significantly less typically, power steering fluid, brake fluid, and other hydraulic fluids might be cooled by an auxiliary radiator on a automobile. The radiator has tubes that include massive quantity of water and has fin region to enable outdoors air to pass by way of. Automotive radiators have been instrumental in keeping the heat made under manage. Routine checks can support in keeping the vehicle’s cooling technique. The place of the radiator is of extreme significance enabling it to perform its major function i.e. cooling the engine. Radiator caps for pressurized automotive cooling systems. Product Note: Cooling Fan Assembly with Shroud – Includes control module. Firstly as a belt driven fan is only going to spin as quickly as your engine low end rpm cooling skills so is not quite as good as it would be with an electric fan exactly where the airflow is much more constant. When the engine is switched off, the cooling program cools and liquid level drops.

In case you notice the engine generates heat more quickly, there must be anything incorrect with the cooling mechanism and it needs upkeep. The engine of a car has a combustion chamber exactly where continuous explosions take location and as such the engine heats up really speedily. A radiator is accountable for handling additional energy or heat that the engine produces to execute effectively. Cooling fans are categorized by cubic feet per minute (cfm) ratings. A corroded or broken radiator can swiftly grow into larger issues for your cooling method and your engine. The excessive heat of the engine compartment and harsh components of the road also contribute to premature failure of radiator fan elements. The radiator caps are a vital portion of the cooling technique and are prone to fatigue and wear, and this might lead to loss of pressure manage. Take into account two cooling systems that are otherwise comparable, operating at an ambient air temperature of 20°C. These fins heat the air that moves over them and cool the oil as they cool. Initial check the fuse to the cooling fan, if negative, replace it. When the vehicle is receiving hotter than normal and the fan should be on, unplug the fan wire. Cost of the fans aside, push + pull on radiators has always worked pretty effectively and a good way to get a bump in overall performance without having escalating noise too a lot more. Some of the much better electric fans can push over three,000 cubic feet of air per minute and have ten blades. Soon after you have repaired the leaks, it is advisable to refill the cooling method with a higher quality coolant. This portion controls airflow and minimizes the work your fan has to make in order to assistance your cooling method. The radiator’s job is to preserve the coolant cool so that when it returns back into the engine, it is capable to absorb a lot more heat. Most of the fuel energy in a vehicle is converted into heat (approximately 70%), and it is the job of a car’s cooling technique to take care of that heat. An electric element is concealed inside the radiator, which heats up and radiates heat out evenly from the front of the radiator. The auxiliary fan assembly improves air circulation via the radiator so that the coolant is successfully cooled. Their principal benefit is that they are less complicated to repair than the lately manufactured radiators. Aside from the radiator, the cooling program is composed water pump, freeze plugs, head gasket, thermostat, hoses, heater core, fan clutch and radiator fan. As you would know, all internal combustion engines produce power by burning fuel and this power drives the wheels of your car. The purpose of the radiator in your Nissan Altima is to preserve the engine from overheating. The cooling system comprises of: the radiator, radiator fan, water pump, thermostat, pressure cap, bypass method, hoses and heater core. If the thermostat is broken, it cannot signal the radiator to cool the engine down at the proper time, therefore causing the engine to overheat. These may be either oil-air radiators, as for a smaller sized version of the primary radiator. Radiator Cooling Fans transfer heat blown by way of it by the fan. A number of tubes are arranged parallel and the superheated liquid flows from the inlet although the fins conduct the heat from the tube and transfer it to the air, blown by the fan by means of the radiator. Typically, there are two varieties of cooling systems employed in a car: liquid cooling and air cooling. An evaporative cooling method may well operate among 80°C and 110°C, which at very first glance seems to be considerably less temperature difference, but this evaluation overlooks the massive amount of heat power soaked up during the generation of steam, equivalent to 500°C. The flex fan has gained reputation in the higher-functionality vehicle and racing circuit. Absolutely everyone who has utilized an electric heater knows that they dry out the air. The most affordable explanation was that the fan that came mounted on the radiator just was inadequate to the activity of pushing enough air by means of it. Make the most out of all the heat generated by your radiator with this Regular Radiator Fan from Radfan, which will not only leave you feeling cosier but also save you cash in the lengthy run. The Valeo auxiliary cooling fan is an electric fan that pushes outside air over the radiator to preserve it cool. Hold your heating bills in verify by generating the most of the warmth your radiators pump out. My replacement heat sink is a Nactua NH-D9DX i4 3U (not an affiliate link), chosen due to the fact it is got good cooling capacity and it does not overhang the ILM (that is, it goes straight up, and the memory that’s subsequent to the ILM will not trigger a clearance concern).

radiator fan motor assembly 

1 other exception on the puller style electric fan if you have a like a 4 row radiator a true thick core radiator a lot of organizations advise you don’t use the puller style. Other fans are controlled by the vehicle’s electrical method, and they turn on when the engine is idling and cool air isn’t blowing by way of the grille. From Flex-A-Lite cooling fans, to Derale fans and Be Cool fans, and other top cooling merchandise like Proform radiator fans, Perma-Cool, SPAL, Dorman, Zirgo, and several a lot more, Summit Racing carries a enormous selection of electric radiator fans from the most trusted brands in aftermarket cooling systems. When you drive at highway speeds, the engine requirements lots of coolant operating through it. If the thermostat doesn’t open, there isn’t adequate flow to hold factors cool. Step 9: Reinstall the cooling fan and shroud by reversing the removal method indicated in actions 3 and 4 above. The thicker fans must make more stress and may well be in a position to overcome the added resistance in a stacked setup sufficiently. Airlocks can typically create up which prevents the hot water from acquiring to all of the radiators. Several electric cooling fans are rated by suggested horsepower to aid you select the optimum cooling fan for your automobile. As they are reflective they reflect the radiated heat back into the space which increases the heat output of the radiators, allowing you to turn them down. Of course, high-overall performance engines call for much more airflow. The aluminum draws heat from the warm cooling fluid inside the tube. The air moving at higher speeds more than the radiator’s massive get in touch with region will cool this liquid quite swiftly and electric and hydraulic pumps will pump the coolant back in the engine. This gives a lot more successful cooling in the winter, or at larger altitudes exactly where the temperatures are low. The overall performance of your Mazda vehicle is tremendously dependent on your cooling method. When the heated liquid exits the engine, it re-enters the radiator, where drawn via a quantity of internal folds and chambers, it is cooled. If you currently have ceiling fans, winter is undoubtedly the time to turn them on. Whilst most people think of installing a ceiling fan for summer season cooling, research show that you can save about 10% on your heating bill by utilizing these fans in conjunction with your heating system. Electrical fans are more extensively utilised due to their economical consumption of horsepower. There need to be a tipping point where the fan produces a lot more than adequate pressure and the stacked rads start outperforming a solo radiator. You even have the potential of shutting off or turning down your home thermostat and just heat the rooms you are sleeping in. This can translate into added positive aspects are numerous for an oil filled radiator heater more than a classic convection space heater. Like the radiator, the heater core acts by removing heat from the engine. Some of the clear indications of leakages are reduce levels of the coolant and overheating of the engine. If the outdoors air is not sufficient, a fan positioned behind the radiator does the job automatically as a result maintaining the temperature of the engine below handle and preventing it from overheating. The truth is that most vehicle engines cease at high temperatures and a consistently heated engine will definitely have damaged internal components. If your vehicle is overheating, it could be that the thermostat is not opening. Whether you notice your dashboard’s temperature gauge climbing, or see smoke bellowing from underneath your hood, when an engine begins to overheat, it is crucial to stop the vehicle as soon as feasible. Cooling fan clutch cutaway The clutch consists of a fluid coupling complete of a silicone based largely oil. One more side impact of more than-cooling is decreased efficiency of the cabin heater, even though in common cases it nonetheless blows air at a considerably larger temperature than ambient. Radiators function by sending coolant by means of the inner components of the engine to absorb heat and once sufficient heat is absorbed, the coolant travels back to the radiator to be cooled down, and the cycle continues as you drive. I have no hesitation attaching the lighter fans straight to the radiator or condenser with pull-through zip ties and rubber pads, but for the heavier larger-output fans, I am concerned about the anxiety placed on the tubing and fins, so I mount them instead with brackets, which is a lot a lot more perform.

An aircraft radiator contained in a duct heats the air passing through, causing the air to expand and obtain velocity. Engine-driven fans are often regulated by a fan clutch from the drivebelt, which slips and reduces the fan speed at low temperatures. The cooling fan does not have a clearly defined service life. This uses a single surface blended into the fuselage or wing skin, with the coolant flowing by means of pipes at the back of this surface. Several aircraft had been built employing their style and set numerous performance records, notably the Heinkel He 119 and Heinkel He 100 However, these systems necessary many pumps to return the liquid from the spread-out radiators and proved to be incredibly challenging to preserve operating correctly, and have been significantly far more susceptible to battle harm. 1 of the positive aspects of electric fans is they come in all sorts of different sizes from slimmer profiles to those with different widths and heights. As the coolant spreads more than the prime of the radiator tubes, it transfers heat to the air. Unbolt the fan shroud from the cross member and slide it back more than the mechanical fan but do not eliminate it. Use care not to loose the clips that the fan shroud and electric fan bolt to. If they break or get lost, you can get replacements at most hardware retailers. If you are adding an electric fan as an auxiliary cooling supply you can use a pusher style. One more consideration for individuals who may possibly be concerned with excessive fan noise is the blade shape, this is where s-blade electric fans come in compared with straight bladed fans. In a car, motor oil is pumped throughout the engine block to lubricate the parts, but this is insufficient to overcome the tremendous heat generated. All round and to summarize the cooling system of your automobile – be it car, truck, or SUV does precisely what its name suggests – it removes, reduces and fundamentally its function is to eliminate heat from your engine system expelling this waste heat into the nearby air. Thermal sort cooling fan clutch There are two easy varieties of fan clutches: thermal and non-thermal (also termed torque limiting”). Engines need heat to operate efficiently, but demand efficient cooling—especially in functionality applications—to get rid of as a lot energy-robbing heat as achievable. This is referred to as the Meredith impact , and high-functionality piston aircraft with well-created low-drag radiators (notably the P-51 Mustang ) derive thrust from it. The thrust was considerable adequate to offset the drag of the duct the radiator was enclosed in and permitted the aircraft to achieve zero cooling drag. Auxiliary fan assemblies enhance the circulation of cold air through the car’s coolant system, particularly when the automobile is idle. There are two kinds of fans, electric and mechanical. They often run following the engine has been shut off to bring the temperature back to regular specifications. In addition, most fan clutches are thermal, so they engage and disengage according to air temperature to make certain the automobile will not get overcooled. Interestingly, storage heaters have been originally created during the strikes of the late seventies and there is an argument that the government encouraged their use at this time as they had been keen to hold the power stations running to make the country dependent on the coal business. The fins conduct heat from the tubes and then transfer it to the air flowing via the radiator. Driven by a pulley (like the manual fan), the insides of the clutch has fluid that produces internal friction that couples with a bi-metallic sensor comparable to a thermostat. This indicates that fan heaters will blast warm air into a room really rapidly, but as soon as they are turned off, the area will cool nearly instantly. If there is a problem with it, you will not be in a position to turn the fan blade effortlessly when the vehicle is off and the engine is cold. The following 3 forms of electric heating consume electrical energy “on demand” as opposed to storage heaters. When issues go from bad to worse, and your broken radiator fan causes a disastrous overheating episode, you may possibly have no other selection but to get a replacement for your radiator unit. The cooling fan relay is generally beneath the hood. It must cool the antifreeze that circulates through the block and head passages and reduces the engine temperature. If the fan is not working even when the automobile is heating up there may be a problem with the wiring.

The engine can be turned on and looked for leaks, the engine need to not be turned off as the radiator is becoming filled and this need to be continued till coolant spills out from all bleed points. Certain automobiles the threading is different, some are threaded to the proper and some are threaded to the left, to decrease the risk of damage,be sure to check the vehicle repair manual. An all-liquid design and style might operate amongst 30°C and 90°C, offering 60°C of temperature difference to carry away heat. Regardless of whether you’re searching to do a cooling technique upgrade or a full on engine conversion, it’s tough to beat Flex-a-lite’s radiator style. Electric cars may possibly not have a fan belt. Monitor the fan performance,adjust the fan speeds,and customize the lighting effects for Thermaltake Plus RGB liquid cooling items with the patented TT RGB PLUS Computer software and an exclusively designed mobile app.Choose a function from beneath and scroll down to study the information. The cooling fan keeps the engine away from overheating. The water with also higher temperature will not release heat, and it will evolve into a “pan”. Such a technique can take benefit of the particular heat of vaporization , which in the case of water is five instances the certain heat capacity in the liquid form. Started with the motors, then the blades…all that was left was to add the radiator and get it mounted up. Here’s a shot or two of the reassembly and fans mounted on the radiator. Bear in thoughts that the peak prices on Economy tariffs are normally considerably higher than at any time on non-Economy tariffs and these prices apply to all appliances used during peak hours, not just radiators. Water pump makes certain that the cooled water or coolant passes the engine with a constant velocity. Upgrading your efficiency car’s cooling system will permit its engine to operate at higher temperatures far more successfully. The size of the radiator (and therefore its cooling capacity ) is selected such that it can hold the engine at the style temperature under the most extreme circumstances a automobile is probably to encounter (such as climbing a mountain while fully loaded on a hot day). Car engineers tried to find answers to removing this heat from the engine and their outcome was the water-cooled radiator. To avert this from taking place, water and coolant liquid is pumped by means of many components of the engine to absorb heat. But all these methods of rising the car’s power output have a series of downsides and an amazing amount of heat is the most essential 1. At this limiting situation, not only will this produce unnecessary noise but stalling of the air will drastically decrease the efficiency of the fan, and is a not uncommon failing in a number of fan installations I have seen. They can be mounted at off-angles in the engine compartment, so lengthy as they assist in cooling the radiator. If your water pump is poor, your vehicle will overheat inside a few minutes right after it is began. The primary purpose is basically because the two age at regarding the very same rate, so in the occasion the water pump has failed, the fan clutch might also fail swiftly. These fans are normally lighter, and they release power drained by mechanical fans or fan clutch systems, giving a clear overall performance benefit and a lot more effective cooling. Later, I discovered that in addition to the fan that’s inside of two radiator banks, it really is also possible to mount an (accessible separately) Noctua fan on the outside of one particular of the radiators, yielding a two-fan resolution. As soon as motorists detect any of these scents, they should act upon them quickly and have their vehicles checked or repaired. Many occasions the hardest issue about restoring your car or truck is finding a prime-rated supply for the best components like an AC Delco auxiliary fan assembly. An electric radiator heats by convection. The oil in the radiator is slowly heated to the preferred temperature, and then the heating unit shuts off. A low efficiency automobile with an inefficient radiator has no location on the busy roads of neighborhoods like North Hollywood. The coolant that gets heated in the procedure is circulated back to the radiator where it flows via the narrow pipes of the radiator grille. Electric fan heaters also work on the exact same principle the only key difference getting that the fan forces air across the electric element speeding up the movement of warm air.

In older automobiles, the fan employed to function with the help of an engine. In Germany, the Günter brothers created an option design combining evaporative cooling and surface radiators spread all more than the aircraft wings, fuselage and even the rudder. The most obvious, and widespread, solution to this dilemma was to run the whole cooling system under stress. For that reason, timely detection and suitable disposal of overheating can successfully decrease losses. This transmission cooler is like a radiator inside a radiator, except, of course, when alternatively of exchanging heat with the air, the oil exchanges heat with the coolant in the radiator. Or, you could get rid of the fan and clutch altogether and set up an aftermarket electric fan kit to cool the radiator. The bypass program is a passage that allows the coolant to move via the engine and then to bypass the radiator to balance the temperature. We can clearly see that the 27mm Denso core flows more airflow for a provided static pressure. This causes the fan to spin quicker for enhanced cooling. With a shorter heating time and higher heat capacity, you can use your energy more efficiently and substantially decrease your heating expenses. Bear in thoughts, without the radiator fan the only way to draw cool air via your vehicle’s grille and into the engine is by motion. These conditions can rapidly grow into bigger troubles for your cooling system and your engine. When the valve is shut, fluid flows back towards the reservoir but doesn’t return, triggering the clutch to slip and also the fan to turn much more steadily. Components and accessories for your Volvo like your Volvo radiator are produced accessible by Volvo Components and Vehicle Components Volvo radiators would really give your Volvo far better and enhanced functionality. The radiator is a huge matrix of little pipes, and when the coolant passes via the cooling cores of the radiator, it cools down, eliminating the heat it has accumulated from the engine. If you do not repair the leaking, you will eventually smell burnt coolant from below the vehicle’s hood. To safeguard your engine, get a replacement fan as soon as feasible by ordering from right here at You can find a assortment of components for your automobile here, for whatever you drive. Making use of flash evaporation, it sprays out fine water particles that evaporate rapidly into the air and lowers the apparent temperature to up 25-30 degrees Fahrenheit. Your auxiliary fan assembly can be located directly in front of the radiator and directs colder outside air across the radiator fins. As steam is significantly significantly less dense than water, a correspondingly larger surface location is required to supply sufficient airflow to cool the steam back down. After I’d finished rebuilding the engine final spring, I reinstalled the original radiator and electric fan, as there didn’t appear to be something clearly incorrect with either of them (the radiator appeared cost-free of obvious corrosion when I peered inside, and the cooling fan, although it looked like it originally powered Churchill across the English Channel, spun smoothly when tested). In most instances, an electric fan forces the cool air from outdoors into the radiator, therefore speeding up the cooling process. Oil filled radiators are normally the first option, although you can also purchase the sort that has a heating element in the bottom of the heater and a grill exactly where the warm air is expelled towards the leading of the heater. Collectively with the radiator , a vehicle fan contributes to the cooling of the engine of a vehicle. As soon as the fins are heated, they release heat into the air, cooling the engine. The AC Delco Auxiliary Fan Assembly increases cooling of your car’s coolant. Check for leakage routinely: The coolant might leak at the hoses or the cap which would leave the radiator inoperable right away. If there is voltage operating to the cooling fan, you probably have a negative fan. For the test rig, I’ve constructed an exhaust collection chamber that’s basically a extended piece of 8″ PVC with insulation, a bunch of flow spreader tubes, and an MCR120 radiator mounted to the face of it. The anemometer hot wire sensor is then mounted to the back of this to measure air speed by way of a smaller sized port. Often, a clogged radiator can be “rodded out.” If the radiator then passes a new flow test, it can be reinstalled for further use. The flow of the liquid coolant determines the actual cooling capacity of the radiator. The radiator is filled with a liquid coolant, normally a mixture of water and ethylene glycol.

Care must be taken to ensure that the flow of the coolant is not hampered by any obstruction. Replace yours as quickly as possible and stay away from overheating or damaging your engine. Interestingly on the other hand, automotive cooling systems are not nearly as vital to the running and ongoing maintenance of diesel engines. Under we have supplied a summary of the electric heating choices offered on the industry detailing their pros and cons to support you decide on which choice is the best for your house. If the fan fails to come on, it can result in the engine to overheat. Then the fluid is circulated by the water pump unit, by way of the channels of your engines’ heavy metal block, by way of the rubber coolant hoses, which you need to be effortlessly spotted when peering into your engine compartment. On direct air-cooled engines this is not a concern for the bellows thermostat that controls a flap valve in the air passages. The radiator-cooling fan is specially made in such a way that it turns on when the temperature of the engine rises and stops when the temperature is typical. The writer explains that in order for automobile radiators in North Hollywood to get in as a lot coolant as vehicle engines need, the hoses conveying the fluid should be huge enough tightening the nozzles or joints also helps improve efficiency by stopping leaks. They all have the same fundamental function, which amounts to drawing in additional air, but specially at low rpm situations and occasions when the car sits at an idle. Logically, however, the cooling fan keeps the cooling technique at the optimal temperature to prevent the hotter than standard engine temperatures, as described above. An early technique was to take benefit of an aircraft’s abundant airflow to replace the honeycomb core (several surfaces, with a high ratio of surface to volume) by a surface mounted radiator. You should make it your day-to-day habit to check the coolant levels in your radiator. These coolant hoses pass from their fitting on the engine eventually to the radiator. A lot more basically they may possibly be oil-water coolers, exactly where an oil pipe is inserted inside the water radiator. This will reduce the efficient back-stress against the flow of air, and at the limit of its overall performance will minimise the possibility of the air stalling by way of the compressor blades. If the radiator does not have cool air blowing on it continuously, it will overheat ultimately, so you’d require the perfect mixture of climate and traffic to drive properly with no a radiator fan. SpeedComfort, a radiator fan, claims to improve the radiator heating power by 20% lowering the warm-up time by 50% and minimizing bills by 22%. Obtaining a green cord for your cabinet cooling fan can support make confident that you only use your fan when it is necessary, as a result using less energy and producing some considerable savings. A TYC Auxiliary Fan Assembly aids a radiator in lowering the excessive heat of the antifreeze. Most electric fans come equipped with thermal-sensors that activate the fan when it reaches a hot temperature. In addition, you will uncover the anti-freezing coolant dripping in to a tiny puddle beneath your car. The fact that radiator pipes are narrow implies it requires much less time for the antifreeze to cool down. This was a key limit on overall performance throughout the 1930s when the introduction of turbosuperchargers initial permitted handy travel at altitudes above 15,000 ft, and cooling design became a main location of study. Style of Fan blades and Motor Assistance ribs in RFM is vital to boost Flow noise, i.e. Air cutting noise. You also need to have to check and identify any external leaks and damages to any of the components of the cooling program that consist of the water pump, radiator, engine coolant passages, heater hoses and heater core. If we’re speaking what do you do with a restricted space, there is also often the selection to run fans on both sides of the radiator in series. The fan clutch is responsible for holding the fan to the engine and turning it. If this assembly burns, you would have to replace it with a new a single. Inside the cooling system, the coolant is sealed and it is under pressure and that is why, in these circumstances, the coolant will boil at about 120 degrees Celsius. Set up the new radiator, with fan assembly, into the vehicle. The radiator fan does not work permanently but only when the temperature switch, connected to the radiator indicates a rise in temperature above a certain set level.