Why is the radiator fan not working on my Lexus RX350?

Possible Causes of Radiator Fan Not Working on Lexus RX350
There could be several reasons why the radiator fan is not working on your Lexus RX350. Here are some possible causes to consider:
1. Blown Fuse: Check the 30A RDI FAN fuse located in the fuse box by the battery. If the fuse is blown, it may prevent the radiator fan from working properly.
2. Faulty Relay: The radiator fan is typically controlled by relays. Check FAN relay #1 and FAN relay #2 to ensure they are functioning correctly. If the relays are faulty, they may need to be replaced.
3. Coolant Temperature Sensor: The coolant temperature sensor, located on the radiator, plays a crucial role in activating the radiator fan. If the sensor is faulty, it may not send the proper signals to the fan relays, resulting in the fan not working.
4. Broken Wire: A broken wire in the fan circuit can disrupt the flow of electricity and prevent the fan from functioning. Inspect the wiring harness for any signs of damage or disconnection.
5. Fan Motor Failure: If all the above components are functioning correctly, it is possible that the radiator fan motor itself is faulty and needs to be replaced.
Troubleshooting Steps
To diagnose the issue with your radiator fan, you can follow these steps:
1. Start by checking if the radiator fan comes on when you turn on the AC. The fan should come on and stay on when the AC is activated. If it doesn’t, it could indicate a problem with the fan or its control circuit.
2. If the fan doesn’t come on with the AC, check the 30A RDI FAN fuse in the fuse box by the battery. If the fuse is intact, use a multimeter to check for voltage (12 volts) between one of the fan’s wiring. If there is no power going to the fan, it could indicate a problem with the coolant temperature sensor or the fan relays.
3. If you suspect a faulty coolant temperature sensor, you may need to replace it. Consult the vehicle’s service manual or seek professional assistance for the correct procedure.
4. Inspect the wiring harness for any signs of damage or disconnection. If you find any issues, repair or replace the wiring as necessary.
5. If all else fails, it is possible that the radiator fan motor itself is faulty and needs to be replaced. Consider consulting a professional mechanic for further diagnosis and repair.
Remember, it is always recommended to consult a qualified mechanic or refer to the vehicle’s service manual for accurate diagnosis and repair of automotive issues.
I hope this helps! Let me know if you have any other questions.

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.

Is the radiator fan always supposed to be running?

In normal operation, no, the radiator fan doesn’t run all the time. The fan is hooked to a sensor that measures the coolant temperature in the radiator, and when the temperature gets a little on the high side, the sensor will (basically) send a signal that turns the fan on.

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.

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.

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.

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.

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 is my cooling fan not working with the AC on?

Why Is My AC Fan Not Spinning? In short, common issues that can cause an air conditioning unit fan to stop spinning are electrical issues, problems with the capacitor, contactor issues, a burnt out air conditioner motor, a broken fan belt, or clogged air filter.

How much does it cost to replace a radiator fan?

For The Car Owner
You can usually get a radiator fan or cooling fan assembly for around $50 to $500. Labor costs for this type of replacement will usually range anywhere between $100 and $400.

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.