Why does my radiator fan not kick on?
The most common reasons a radiator fan is not working are luckily due to a blown fuse, bad relay, or a broken wire. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damaged.
Can the thermostat stop the radiator fan from working?
If this thermostat doesn’t open when the engine reaches the working temperature, the coolant will stay inside the engine block and the engine will start to overheat. This will result in the radiator fan not working.
How do I manually turn on my radiator fan?
Now any car that has an electric radiator fan can be set up with a switch now the idea is to use the switch to ground out one of the pins on the fan control relay.
How do you test a radiator fan problem?
How to Test Radiator Fan with Car Battery
- Find the cooling fan next to the radiator or use your car manual to locate it.
- Unplug the connector.
- Use jumper wires to power the motor directly by connecting it to the car battery.
- If the motor spins it’s in good condition and the problem is either a blown fuse or bad relay.
What sensor turns on the radiator fan?
coolant temperature sensor
On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor.
Can a bad thermostat cause no fans to turn on?
If the thermostat is stuck open (allowing coolant to flow) it can cause the engine to run cooler than normal so obviously the fan wouldn’t come on…..but not like the engine/coolant can be running too hot and the thermostat somehow effects the sensor reading or operation of the fan.
How do I know if my cooling fan relay is bad?
Bad Cooling Fan Relay Symptoms
- The engine runs hot or overheats. …
- The cooling fans don’t work. …
- The cooling fans keep running. …
- Warning lights. …
- Poor air conditioning performance. …
- Swapping Relays. …
- Measuring the Relay Coil’s Resistance. …
- Listening for Noises.
How do you fix a radiator cooling fan?
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. If the fan does not come on, something in the control circuit is defective.
Should radiator fan run when AC is on?
Both fans present in the car, the primary cooling fan from the radiator and the secondary cooling fan from the air conditioning system’s condenser, should immediately turn on when AC is switched on. Turning the radiator fan on is controlled by the rise in coolant temperature.
Where is the cooling fan sensor located?
The Engine Coolant Temperature Sensor can be located in a few places, depending on the vehicle and its manufacturer. It is most often located close to the thermostat of the cooling system or inside of it. The cooling system is located beneath the air intake pipe and behind the right cylinder.
How do you test a cooling fan?
Start the air conditioning. Once you start the air conditioning the low-speed fan should turn on in other words these fans should kick on but it's at the low speed setting.
Does coolant temp sensor control the fan?
As the control system receives the temperature from the CTS, it may trigger the cooling fan to either shut off or turn on. Additionally, it may signal the need for a richer fuel mixture or open the exhaust gas recirculation.