The radiator fan only works when I turn on the air conditioner, In general, this failure can occur for various reasons, among them, when the circuit of the thermal switch or the temperature sensor is defective and does not send the control signal to the radiator motor, which is possibly damaged.
What is a car radiator fan?
The radiator fan of a car is a part that works with the objective of keeping the temperature cool so that it does not suffer from overheating. These components are located between the car’s engine and the radiator. There are two types of radiators: mechanical and electrical.
Why does the radiator fan only work when the air conditioner is on?
If you notice that the radiator fan only works when the car’s air conditioning is on, it means that the temperature sensor or thermal switch may be damaged. Next we will know the causes for which it occurs:
Causes of the radiator fan only working when the air conditioning is on
Many drivers are distressed when they realize that the fan only works when the air conditioning is on, perhaps due to the fact that the car overheated. When turning on the air conditioner, the radiator fan automatically turns on to cool the water in the radiator. But, when the air conditioner is off, it won’t come on even though the engine is hot. We are going to know different causes that lead to this problem:
- Faults in the temperature sensor or in the thermal switch.
- Lack of effective communication to indicate that the car is overheated.
- Radiator fans not turning on for cooling
This is all because the car’s electric radiator cooling fan is controlled by the thermal switch. This piece is located on the side of the radiator. When the refrigerant temperature rises in the air conditioner, the switch to activate the cooling fans is closed. The refrigerant is used to cool and meet the temperature, and when the temperature rises above the set level, the fans are activated to lower the temperature. Some Radiator fans in cars with air conditioning are activated by rising coolant levels.
It may interest you:
- Why does the car get hot when I turn on the air conditioner?
- Why doesn’t my car air conditioning fan work?
How to repair a radiator fan when it only works with the air conditioning on
When detecting that the radiator fan only works with the air conditioning on, the first thing to do is seek the advice of a professional in a specialized workshop, so that they can review and diagnose the fault. In this situation it is important to drive the car carefully to avoid overheating. The fault is most likely coming from a circuit in the thermal switch or the temperature sensor. Possibly the car is old or has a lot of mileage, so the circuit is faulty. Another failure that can affect the radiator fan is due to damaged wiring.
should also check the cover of the thermal switch that connects the lower radiator hoseto where the main thermal switch that has the function of activating the cooling fans is located. Another part that you will need to check is the wiring system., you must make sure that the switch is correctly connected and that they are in good condition. If necessary, it is best to replace the thermal switch or the radiator fan.
Radiator fan may not have a problem
Many vehicle owners become impatient to find that their radiator fans only come on when the air conditioning is on. Although this is not due to a fault, if the car is not overheating. Radiator fans come on automatically when the air conditioning is on, helping to keep coolant temperatures down. Even when the air conditioner is turned off, the temperature may not be high enough for the radiator fan to come on.. Most cars the coolant must reach 225 Fahrenheit to turn the fans on. If you often drive with the air conditioner on, the refrigerator probably won’t get that high of a temperature.
To check if it has a fault or not, the vehicle must be started without activating the air conditioning and left off for 10 to 15 minutes. It is best to keep the car idle to perform this test when driving, cold air from the wind passes through the vehicle’s radiator. This test can also be performed on a warmer day, due to freezing temperatures or strong winds, to keep the coolant at a lower temperature. After it works for 15 minutes, you should check if the fans are on.
Resume
In case the radiator fans only work while the car’s air conditioning is on, most likely a fault with the thermal switch or temperature control. The best thing you can do is seek the advice of a specialist in a repair shop. air conditioning repair of vehicles, to discover and diagnose the exact problem with the radiator fan of the car.
Writing Gossipvehicle
