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Are both radiator fans supposed to spin?
Both radiator fans should always run when the AC compressor is engaged. Both radiator fans should always run when the coolant temperature sensor in the bottom tank of the radiator reaches about 212*F.
Do electric radiator fans push or pull air?
Electrical fans can either push air through the radiator or pull air through it. A pusher fan sits in front of the radiator. When a vehicle is moving, a pusher fan can obstruct airflow due to its positioning in front of the radiator. A puller fan on the other hand sits right behind the radiator.
How do I test my electric radiator fan?
The fan motor itself can be checked by using jumper wires. Unplug the wiring connector on the fan, and use the jumper wires from the battery to route power directly to the fan. If the fan motor is good, the fan should spin at normal speed when supplied with 12 volts.
What temp should my electric fan turn on?
Your radiator fan should kick in at about 200 degrees Fahrenheit. If you notice your vehicle is overheating or at the very least running hotter than it normally does, listen for the fan to see if you can hear it.
Should radiator fan turn on when AC is off?
Both radiator fans should always run when the AC compressor is engaged. To check the temperature at which the fan comes on, turn the A/C off and keep the engine running until it reaches normal operating temperature. Most fans should come on when the coolant reaches about 200 to 230 degrees.
Why do some cars have 2 radiator fans?
One fan is controlled by a coolant temperature sensor, and the second (only installed if the car has air conditioning) is only turned on if the first fan isn’t able to provide enough cooling (air conditioner running, or coolant temperature rises a set amount above switch point for first fan).
Are electric radiator fans worth it?
A key advantage of electric fans is increased engine cooling and improved air conditioning cooling at idle, when it is most needed. In addition, replacing an engine-driven fan can increase horsepower and improve fuel economy as the engine drag from turning the fan is eliminated.
Are electric radiator fans better than mechanical fans?
Although they will place an additional draw on the electrical system, they are a more efficient alternative to mechanical fans and don’t cause the dreaded parasitic horsepower loss. Here are a few other advantages of electric fans: Consistent cooling—they maintain their airflow at all times. Reduced water pump wear.
How does an engine cooling fan work in a car?
The engine cooling fan is designed to move air through the radiator when the vehicle is at slower speeds or stopped. This air flow removes heat from the coolant created by the engine using the radiator as a conductor.
How does a pusher fan on a radiator work?
The pusher fans receive air that comes in through the grill area and then they push that cooler air over the radiator. The puller fans pull the air from the grill, drawing it over the radiator. The electric fans get their power through the engine itself.
Where are the fans located on a radiator?
The radiator fans are situated between the radiator and the engine, although some radiator fans are located at the front of the radiator. Many of the fans are electric. The electric radiator fans mounted in the front of the radiator are known as pusher fans.
Why are both radiator fans supposed to work at the same time?
One of them is, and one of them is not. Obviously if the car is designed for two fans to run at once, then it’s not getting enough airflow at standstill and that causes my car to overheat. But if it is supposed to be that way, that means it’s something else. 1986 Chevy K20, 350 4×4 on Megasquirt. Brings the car home when it breaks. Future cars?