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How long should car fan run after off?
Your car fan will run for a few minutes after you turn off the car then turn it off. This is normal in many vehicles, such as BMW or Mercedes-Benz. The radiator fan may run up to five minutes and sometimes longer.
Why does my cooling fan keep running?
Cooling fans stay on at all times If the cooling fans are staying on at all times, this is another (less common) symptom of a possible problem with the cooling fan relay. If the relay shorts internally, it may cause power to be permanently switched on, which will cause the fans to run at all times.
Why does my car sound like it’s running when its off?
Engine cooling fans and other systems are programmed to keep running in some cars even when the engine is off. Once outside the car, she could hear a fan running in the engine area and asked us if this is normal. It is. And many other sounds from under the hood of a car that has been shut off are also normal.
Why is my radiator fan not turning off?
Pull the cooling fan relay out of the box. Replace the cooling fan relay with a new one. 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.
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.
Why does my engine still run after I shut it off?
Running-on is when the engine continues to turn after you’ve switched off the ignition because the fuel /air mixture is being ignited by a hot-spot in the combustion chamber . The problem can be so bad that the engine runs on for a minute or more if left alone.
How do you test a fan relay?
How to Check a Fan Relay
- Look at the markings on top or side of the relay case and locate the two control circuit terminals, which connect to the relay’s coil, and the two power circuit terminals, which let electrical current pass to the fan.
- Connect the leads of an ohmmeter to the power terminals on the relay.
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,
Why does my Honda Accord fan keep running?
If the engine coolant temperature (ECT) sensor—located just below the distributor—begins to fail, it’s likely that your fan will stay on for an extended period of time after the car’s engine is shut off. The second temperature sensor is located underneath the radiator.
Can a car cool with the engine off?
There probably would be nothing wrong with letting the engine cool “by itself” (which is what happens if the design removes power from the fan when the ignition is off), but since the normal operation of most cars is to run the fan when the water temperature exceeds a set threshold, it does so even with the engine off.
Why does my blower run when the car is turned off?
When full of debris/leaves/twigs/etc from over the years, it backs up and oddly enough, diverts drain water (rain, carwash, etc) just above the passenger footwell…which happens to coincide with where the blower resistor/regulator is located. Hence, water + electric component more often than not = failure. Click to expand…