How do you know if your radiator fan switch 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.
Where is the coolant fan switch located?
The cooling fan switch should be located near the thermostat housing on the left side of the engine, behind the distributor assembly.
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. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat.
Should radiator fan turn on and off?
Most fans should come on when the coolant reaches about 200 to 230 degrees. An electric fan SHOULD NOT run all the time. A mechanical fan WILL spin as long as the engine is running, but it will only ‘lock up’ when needed.
What temperature should the radiator fan turn on?
about 200 degrees Fahrenheit
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.
When should my radiator fan kick on?
Does the radiator fan affect the AC?
The radiator fan pulls air through the condenser, which removes the heat vapor of the refrigerant inside. If the radiator fan fails, it will affect the AC performance.
Is it normal for radiator fan to turn on?
This is because the engine needs air to keep it at the optimal temperature. The grille cannot draw enough air through most of the time, which is why you have a radiator fan. The fan turns on to circulate additional air.
When should the radiator fan turn on?
Temperature will often determine the time that a radiator fan starts up. A temperature-sensitive switch functions to turn the fan on and off periodically. Radiator fans are designed to start when the temperature of the engine coolant reaches around 200 degrees Fahrenheit.