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Why does the radiator fan come on and does it only come on when the car is running hot?
Wiki User
∙ 15y ago
An automatic radiator fan will go on and off in cycles to cool an engine down when it begins to heat up. It works with sensors that monitor the engine heat and trigger other sensors to turn on the fan. It will even run with the car engine off after it's been driven a long time and is hot enough to need it. Then it will turn off on it's own. It's normal operation. IT's when the fan doesn't come on when the engine is hot that you need to worry, or when your temp gauge is showing hot and you check for the fan to see if it is turning on and off and it's not working that you have a problem.
Wiki User
∙ 15y ago
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How do you add water to a jetta radiator?
When a car is hot, keep the car running and add water to the radiator. When a car is cold, you can simply put the water into the radiator.
Why does your radiator leak only when the car is on?
When vehicle is running: Water pump is circulating coolant and cooling system pressure is building
Should the car be running to flush the radiator?
Just flushing the radiator, no but to flush the system, yes.
Why your car stopped while running?
maybe my radiator is defective
What do you check if your water is leaking out your car and running hot?
Thermostat and radiator
Do you fill the radiator when the car is running?
first turn on the car and add the water to the radiator while the engine is running-- this allows the water pump to work and force the water to all the thirsty parts this will help the radiator and the crankcase fill much faster
Does the radiator fan not kick on a lot you have been working on your radiator and your car hasn't overheated but you never see the fan come on?
Depends on how long the car was running. Let the car run for an hour at idle and if it never comes on, I would check the fan. It should come on at sometime. Check the relay..............I just had this problem on my '89 Beretta. DoratheExplorer
When do you know you need a new radiator?
If your radiator is leaking then you will need to replace it. Additionally, if you find that your car is constantly running hot you will need a new radiator.
How do you know if water pump has broke on my car?
You should see the coolant circulating in the radiator when the car is running
Do both radiator cooling fans suppose to come on to cool your car?
The fans normally come on when needed. Is the car running hot -- is the temperature gauge reading above normal? If so, there's a problem with the fans or the cooling system. If not, don't worry about it.
What sHow is the water pump is bad on a car?
After running your car for 20 minutes or so ,and there is coolant in the radiator, you will get no heat.
Car starts running hot but no water moves from the radiator?
This is likely a stuck thermostat.
