Why is my cooling fan not coming on?
Six things may prevent an electric cooling fan from coming on: Defective temperature switch, coolant sensor or other sensor. Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan) Faulty fan relay.
What controls the radiator fan?
A mechanical fan is connected to the engine directly by drive pulleys. This type of radiator fan is controlled by a thermal fan clutch that senses radiator heat. After sensing the heat temperature, the radiator fan turns on when the engine is running at a higher temperature.
How long does it take for the cooling fan to turn on?
Turn the air conditioning to the maximum setting – this should spark the cooling fan to immediately come on. In older cars, this typically takes about 15-20 minutes for the engine to reach the right temperature.
How often should the cooling fan come on?
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.
Why does my radiator fan not turn off?
If the fan doesn’t stop running, plug that sensor back in and unplug the coolant temp sensor on the thermostat housing. If the fan stops running, replace that sensor. If the fan still runs after unplugging both sensors, then problem might be with radiator fan control module located behind the glove box.
What causes a car fan to run constantly?
If the fan comes on, you may have a bad temperature sensor or gauge. 2. A cooling fan temperature switch (or sensor, in some vehicles) can also get stuck, which may cause the fan to run continuously any time you turn the ignition key on or start the engine.
Can low coolant cause fan to stay on?
Troubleshooting Tips If the fan turns off, that means the relay is at fault. Furthermore, check for low coolant level and possible leaks that may be causing it. Usually, a low coolant will equate to a hotter engine. Therefore, it will activate the fan more often.
Why is my car cooling fan so loud?
One such problematic issue, the excessively loud radiator cooling fan, is a common plague many automobile owners will experience. Your radiator fan should be audible. Worn bearings, bent or broken blades, and unbalanced rotating assemblies can cause a fan to screech, howl, or otherwise make noises it shouldn’t.
How much does it cost to fix a radiator fan?
The average cost for a replacement fan is between $634 and $789. Labor costs are between $102 and $130 while parts are between $532 and $659. Taxes and fees are not included in the estimate.
What happens if your radiator fan stops working?
If your cooling fan stops working, your engine could overheat. This could cause damage to your engine parts. It’s a serious issue and needs to be looked at by a garage.