What should I do if my radiator fan stops running?
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.
How does the radiator fan on a car work?
The radiator fan module has a ten minute timer in it that allows the fan to come on if one of the temp sensors detects a coolant temp over a specified temperature. This is when you shut off the car and the fan stops, but a minute later is starts up again.
Why is my computer cooling fan not working?
A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor. The relay, however, has direct power to one side, the same as a light switch.
Why does my car fan keep running after I shut it off?
It is so the car won’t heat soak and blow coolant out the pressure release. Your habit of pulling the fuse may have arced the contacts on the fan relay causing it to weld itself open. Replacing that relay should fix it but it still may run the fan after you shut the car off.
Why is your radiator fan not running?
The most common causes when a radiator fan is not coming on is broken fuse, bad wirings, bad coolant temperature sensor, bad fan relay, or a faulty radiator fan . Here is a more detailed list of the most common causes of a radiator fan not coming on.
Why does radiator fan not working?
- the first thing to check is the fuse. If you don’t know where the…
- check the fan wires. Start by unplugging the wires.
- Temperature Sensor. The temperature sensor determines when the radiator fan comes on by reading the cooling system…
- Coolant Level. Check the coolant level in your engine. The simplest way to do this is to look at the reservoir in the…
Why is the cooling fan not working?
If you think the cooling fan isn’t working because your temperature gauge is indicating overheating , open the hood, start the engine, and let it idle for 15 to 20 minutes. If the fan comes on, you may have a bad temperature sensor or gauge .
Why is the engine cooling fan not working?
The temperature sensor determines when the radiator fan comes on by reading the cooling system temperature. If the sensor isn’t working, your fan won’t come on because it won’t know that the temperature is hot enough to require activation, which can frequently lead to overheating.
Why does my car fan keep running after I Turn Off the engine?
Running cooling fans help cool down the engine even after you turn off the car. Common Causes. If your cooling fan runs for over 10 minutes after turning off the engine, you may have a problem that needs to be fixed. Here are some possibilities causing the fan to stay running longer. low coolant level, faulty coolant temperature sensor,
When does the coolant fan run in a car?
The coolant fan will run when the coolant exceeds a certain temperature irrespective of if the engine is running or not. Some vehicles even have supplementary electric water pumps set to run after engine shut down to keep coolant circulating.
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.
Can a car fan still run after the engine is turned off?
Then you notice the engine cooling fan is still running even though the car is turned off. It is ok for the engine cooling fan to keep running for a few minutes after turning off the car. Your car fan will run for a few minutes after you turn off the car then turn off. This is normal in many vehicles, such as BMW or Mercedes-Benz.
The radiator fan module has a ten minute timer in it that allows the fan to come on if one of the temp sensors detects a coolant temp over a specified temperature. This is when you shut off the car and the fan stops, but a minute later is starts up again.
Why does the coolant fan run when the engine is shut down?
This behaviour is by design. The coolant fan will run when the coolant exceeds a certain temperature irrespective of if the engine is running or not. Some vehicles even have supplementary electric water pumps set to run after engine shut down to keep coolant circulating.
Why are the cooling fans not working on my car?
1. Engine running hot 2. Cooling fans do not function 3. Cooling fans stay on at all times Average rating from 129,472 customers who received a Vehicle Engine Cooling Inspection. Most modern vehicles use electric cooling fans to help pull air through the radiator so that it can keep the engine cool.
When do radiator fans come on at highway speed?
Normally, if the coolant system is in good shape, the fan won’t come on while the vehicle is moving, especially at highway speed. Electric fans come on when the coolant rises above normal. The fans blow air through the radiator and that cools the coolant.
When do electric fans turn on and off?
Electric fans are controlled by a thermostat and turned ON when more cooling is required. This is not a function of speed, although high speed provides more cooling so less fan operation required.
Do you turn off the radiator fan at highway speed?
In a perfect world, at highway speed, the fan will turn off, then on if needed and will stay on only for brief amounts of time. If the AC is running, electric fans usually stay on to cool off the AC condenser and will stay on, even at highway speeds. But yes, sometimes they will switch on at highway speeds.
Why is my radiator fan not turning on?
The computer sends power to the relay to activate it and turn the fan on. Once activated, however, if the relay sticks in the closed position then the fan will run until the battery is totally discharged.
What happens when you turn off the cooling fan?
In certain cases, the cooling fans may even stay on when the vehicle is turned off, and will create a large parasitic drain that will eventually kill the battery. The cooling fan resistor is an important component, as it is one of the components that routes power for the cooling fans.
What should I do if my car cooling fan is not working?
On many modern vehicles, if you want to confirm whether your cooling fan is in working order, you can start the engine and let it idle. Set your air conditioning to the MAX setting and turn it on. The cooling fan should come on immediately or within the next couple of minutes.
Are there any radiators that won’t turn off?
I have two of my radiators turned to ‘off’ yet when the heating is on, they both pump out heat full blast. Other radiators in the house stay off when turned to this setting- any ideas why this might be happening?