Why are the fans still running after the engine is shut off?
Why are the fans still running after the engine is shut off?
Engines are still hot when you shut them off, the fans need to run to continue removing heat from the cooling system. (In fact engine heat can increase when you first shut them off since water pump is no longer circulating coolant, as hot coolant expands from the heads and into the radiator, the cooling fans need to run to bring that temp down.
Why does the radiator fan run all the time?
The radiator fan may run up to five minutes and sometimes longer. Unless there is an electrical issue, it may stay on all the time until it drains the battery. When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated.
What happens when you turn off the cooling fan in a car?
However, if you want to return to your parked car after about 10 minutes on a very hot day and turn the ignition to the “on” position (not the accessory or start positions), you will likely see a higher temperature on the gauge than when you turned the ignition off 10 minutes earlier. Yep, that was just what I did.
Is it normal for a car fan to run all the time?
This is normal in many vehicles, such as BMW or Mercedes-Benz. The radiator fan may run up to five minutes and sometimes longer. Unless there is an electrical issue, it may stay on all the time until it drains the battery. When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated.
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,
Is it normal for a car cooling fan to run?
Some cars allow the fan to run after the key has been removed, some cars don’t. I like the ones that allow the fan to run. If you look under the hood, you will see a warning label telling owners to expect this fan behavior. It’s quite common in today’s cars.
The radiator fan may run up to five minutes and sometimes longer. Unless there is an electrical issue, it may stay on all the time until it drains the battery. When the engine is running, the coolant circulates from the engine and flows to the radiator, where heat is dissipated.
What happens when you shut off the cooling system?
SteveF has it right…With all engine and cooling system designs, when you shut off the engine, you also shut off the water pump. Coolant trapped in the heads can boil as it absorbs the heat in the metal engine parts with no way of transporting this heat to the radiator.
