The most notable fan used for both heating and cooling would probably be of the Dyson brand. They have a product called the Dyson Hot+Cold, which is a bladeless heater fan used for both cooling and heating.
If the question is about the motor fan or engine fan, the main function of this fan is cooling the radiator of the engine which in turn is cooling the water circulating inside the engine unto the radiator and back. This keeps the engine at a fairly operable temperature without overheating and damaging damaging its parts.
The first cooling fan was invented in 1882. It was invented by Schuyler Skaats Wheeler. The ceiling fan was invented in 1887 by Philip Diehl.
Some motors are specially designed for low speed. Some are "invertor Duty" classified so that they can be run on invertor (VFD) normally with a high heat dissipating design. On low speed the cooling effect reduces drastically since the cooling fan is mounted on the same motor shaft. Hence a separate small cooling fan is mounted on the motor, driven by separate power such that it keeps running at normal speed irrespective of main motor speed, thus providing the required cooling effect.
Fan is the thing that makes air to the cooling metal things, the ones that carrys the water. Exhaust is the thing it puts out all the noise.
The cooling fan will run whenever the AC or Defroster is on. Beyond that, it will run whenever the sensor indicates that the temperature is above a set-point.
There is a sensor that detects temperature to turn the fan on in some vehicles, this sensor may need to be replaced.
Simply bypass the cooling fan thermostat .G
Several things may be the cause ...... fan no longer works, cooling fan relay no longer works, coolant temp sensor is bad, or maybe even the cars ECU is'nt telling the fan to come on. Ron J.
If the AC is on constantly, the fan will be on constantly. If that's not it, it mught be the fan relay or the temperature sensor.
Bad temp. sensor? on most ford contour cars the cooling fan only runs when the motor reaches a certain temp. this model car also has a cooling fan relay switch,if the switch is bad the fan will not run.
Chances are the TCS temprature coolant sensor has gone faulty. This will cause the cooling fan to run witha cold engine
The electric cooling fan or cooling fan temp sensor may be faulty.
Answer: If you mean your radiator cooling fan, it most likely is a grounded or shorted circuit from the "cooling fan sensor" (internal) or a pinched wire. Depends on when it happened: was there any work done prior to this happening? IF not, then the sensor is most likely the issue. In this case, once you find it (normally the sensor is screwed into the bottom of the radiator), unplug one of the wires (or remove the connector) and see if the cooling fan continues to run, if the fan turns off, then replace the sensor.
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The cooling fan generally does not run when the car is cold, but could be wired directly to the battery so that when the ignition is engaged, the fan comes on. This is not a factory modification but is often accomplished if the car tends to run hot.
The thermostat may need to be replaced. The cooling fan might not be working. The cooling fan should run while the a/c is on. Two things I would check first.