Chevy Silverado Fan Won’t Shut Off (Easy Fix)
The Chevy Silverado comes with an electric cooling fan that is often controlled by the vehicle’s computer system. Unfortunately, with this component comes the issue of the fan running even with the truck turned off. This is often dangerous and has costly consequences.
Usually, if the fan does not shut off, it is often related to either the wiring or the computer. The causes range from a faulty radiator, low coolant levels, bad radiator fan relay, and poor thermostat housing. The first step to diagnosing this issue is to check all corresponding fuses and relays. From here, you can move on to inspect any corroded connections or loose wires.
This article explains in depth what causes the fan to stay on in your Chevy Silverado, as well as suggest tips to fix the issue.
Chevy Silverado Fan Won’t Shut Off
The Chevy Silverado is known to be a powerhouse of a truck and has since proved that. However, when it comes to cooling the engine, the fans do not always respond as desired. Many previous owners have reported it staying on even after the engine has been turned off and cooled down. This can be quite annoying and even dangerous. Moreover, it can wear down the battery power and increase the fuel consumption.
Why Is My Car Fan Not Turning Off?
The fan forms a very crucial part of the cooling system in your vehicle. However, it is likely to malfunction over time. Here are some reasons why your fan won’t turn off.
Low Coolant Level
If you notice that your fan keeps running even after the engine has been shut off, then it could be that the coolant levels are low. It could be leaking from the water pump, and this reduces the amount of coolant. In turn, it could keep the fan running.
Faulty Radiator
If your radiator is damaged, the fan may keep running. A common radiator-related cause is a crack in the radiator. It could also result from the radiator hoses as they are susceptible to wear and tear.
Bad Radiator Fan Relay
The radiator fan relay could be to blame and requires inspection. The component works to regulate the flow of electricity to the cooling fan. In case of any issues with this relay, the fan will be affected. For example, if the fan relay gets stuck in position and becomes inoperable, the fan will also malfunction.
What Do I Do if My Car Fan Does Not Turn Off?
Here are some of tips you can apply if you notice that the cooling fan is still running after turning off the engine.
Remove and Disconnect the Negative Side of the Car Battery
Disconnecting the battery will stop the battery from running. This is done by disconnecting the cable attached to the negative terminal of the battery. If after disconnecting the negative end of the battery the fan goes off, then you can conclude that the source of the problem is the relay. You can fix this by replacing the fan relay with a new one. A digital multimeter can also come in handy in examining the fan relay.
Check Coolant Levels
It is important that you take note of the coolant levels so you can determine whether the cause of the problem is low coolant levels. While at it, inspect for any leaks. Low coolant levels cause the engine to become hotter which may end up activating the cooling fan. Ensure that you top up the coolant levels with the right coolant.
Check Your Temperature Sensor
If the fan keeps running, another place to check is the coolant temperature sensor. This sensor works to send signals to the engine control unit about the engine temperature. If faulty, the fan may keep running.
FAQs
What Sensor Controls the Car Fan?
The radiator fan is controlled by the coolant temperature sensor. This sensor is responsible for sending signals to the Engine Control Unit ECU which also receives signals from the engine coolant temperature sensor and controls the cooling fan.
How Much Does It Cost to Change the Fan in My Car?
On average, replacing the radiator fan in your vehicle will cost you between $300 to $400. Usually, the cost of a new radiator fan ranges between $400 to $450, depending on the type of car. Thankfully, in most vehicles, the radiator fan can be easily accessed and repaired since it is directly mounted on the radiator. You can save some labor costs by changing the fan on your own.
Is It Safe to Drive With a Faulty Radiator Fan?
No, it is not safe to drive with a malfunctioning radiator fan. If this fan cannot supply cold air to the engine, then the motor can easily get damaged due to an overheated engine. And we all know that it is more expensive to replace an engine than it is to replace a faulty radiator fan.
Conclusion
If you notice that your fan is not turning off, you can try the tips above. however, if the issue persists regardless of what you try, it is best to consult a certified mechanic for assistance and advice. They will help diagnose and troubleshoot the exact problem.
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