Why is the radiator fan not working on my Lexus ES350?

Possible Reasons for Radiator Fan Not Working in Lexus ES350
There are several potential reasons why the radiator fan in a Lexus ES350 may not be working. Here are some possibilities based on the information available:
1. Check the AC Activation: The first step is to check if the radiator fan comes on when the AC is turned on. The fan should come on and stay on. If it doesn’t, it’s recommended to check the 30A RDI FAN located in the fuse box by the battery. If the fuse is good, then checking for voltage (12 volts) between one of the fan’s wiring is advised. If there is no power going to the fans, it could be due to issues with the coolant temperature sensor or the FAN relays.
2. Coolant Temperature Sensor: The coolant temperature sensor, located on the radiator, plays a crucial role in activating the FAN relays, which in turn starts the fans. If there are issues with this sensor, it could lead to the radiator fan not working properly .
3. Fan Motor and Wiring: If the fan motor is not working, there will not be enough air movement through the radiator, especially when the car is at a standstill, which can lead to coolant temperature increases. It’s also important to check for voltage between the fan’s wiring to identify any potential issues.
4. Relay Operation: The radiator fan is commanded by the Engine Control Module, and a relay is tasked with switching the fan on and off. Issues with the relay or the control circuit could lead to the fan not working as intended.
5. Mechanical Damage: In some cases, accidental exposure of the fan and motor to oil and coolant, followed by rinsing, may lead to motor issues. It’s important to consider if this could have caused the motors to stop working.
Conclusion
In conclusion, the radiator fan not working in a Lexus ES350 could be due to various factors such as issues with the coolant temperature sensor, fan motor, relays, or mechanical damage caused by exposure to oil and coolant. It’s recommended to systematically check these components to diagnose and troubleshoot the problem effectively.

What sensor turns on the radiator fan?

Yes, the coolant temperature sensor is an important component in controlling the radiator fan in many modern vehicles. The coolant temperature sensor monitors the temperature of the engine coolant and sends this information to the engine control module (ECM), which uses it to determine when to turn on the radiator fan.

What stops a radiator fan from working?

A signal from the coolant temperature sensor is what triggers the ECU to turn on the radiator fan, and if it’s faulty, it can prevent the fan from working at all. Test the fan relay. Since the relay operates as a switch for the fan’s power, a defective cooling fan relay won’t energize the circuit.

Why is my radiator fan not working on my Lexus IS350?

The most common reasons a Lexus IS350 radiator fan isn’t working are the fan assembly, the fan clutch, or the coolant temperature sensor.

Should radiator fan turn on when AC is on?

First, run the AC and see if the radiator fan runs: it’s supposed to run with the AC by default. If it doesn’t run, you likely have a low level of refrigerant in the system or a faulty switch or a sensor, or a bad fan motor, fuse, relay, or a wiring problem.

Can you drive a car if the radiator fan is not working?

Can I Drive My Car If The Fan Is Not Working? Yes, your car can still run without a radiator fan, but you never should. Your vehicle’s cooling system is crucial to the engine’s performance and lifespan. Every time your engine overheats, you’re causing tremendous damage to the precious engine.

Is there a fuse for the radiator fan?

And sometimes a minimum sign as well make sure the engine is cold and open the container carefully. And then fill it up with antifreeze up to the maximum. Mark.

How do I know if my radiator fan fuse is blown?

You might see a temperature light pop up on your dashboard. In this case stop driving immediately. And turn off your car. The fifth symptom is a blown cooling fan fuse.

Why are my radiator fans not kicking on?

The most common reasons for a radiator fan not working can be a blown-out fuse, a bad relay, or a broken wire. The faulty coolant temp sensor might also be a reason behind it. Whatever the case, a dysfunctional radiator fan can be fatal.

When should radiator fan turn on?

between 200 and 230 degrees Fahrenheit
In most vehicles, the radiator fan is programmed to turn on when the engine coolant reaches a temperature between 200 and 230 degrees Fahrenheit (93 to 110 degrees Celsius). However, some vehicles may have different temperature thresholds for the radiator fan to activate.

When should radiator fans kick on?

Your radiator fan should kick in at about 200 degrees Fahrenheit. If you notice your vehicle is overheating or at the very least running hotter than it normally does, listen for the fan to see if you can hear it.