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

Possible Causes of Radiator Fan Not Working on Lexus IS350
There could be several reasons why the radiator fan is not working on your Lexus IS350. Here are some possible causes based on the search results:
1. Faulty Fan Motor: If you accidentally got oil and coolant on the fans and motor and then rinsed them off, it’s possible that the fan motor got damaged in the process.
2. Blown Fuse: Check the 30A RDI FAN fuse located in the fuse box by the battery. If the fuse is blown, it could be the reason why the fans are not turning on.
3. Coolant Temperature Sensor: The coolant temperature sensor, located on the radiator, plays a role in activating the fan relays and starting the fans. If the sensor is faulty, it may prevent the fans from turning on.
4. Fan Relay: There are multiple fan relays that control the operation of the radiator fans. If one of these relays is faulty, it could be the reason why the fans are not working.
5. Wiring Issue: Check for voltage (12 volts) between one of the fan’s wiring. If there is no power going to the fans, it could indicate a wiring problem.
Troubleshooting Steps
To diagnose and troubleshoot the issue with your radiator fan, you can follow these steps:
1. Check the 30A RDI FAN fuse located in the fuse box by the battery. If the fuse is blown, replace it with a new one.
2. Use a multimeter to check for voltage (12 volts) between one of the fan’s wiring. If there is no power, it could indicate a wiring issue.
3. Inspect the coolant temperature sensor located on the radiator. Ensure that it is properly connected and functioning correctly.
4. If you have access to a diagnostic computer, you can try turning on the radiator fan using the diagnostic tool.
5. If all else fails, it may be necessary to consult a professional mechanic or take your vehicle to a Lexus dealership for further diagnosis and repair.
Remember, these troubleshooting steps are general guidelines, and it’s always recommended to consult a professional mechanic for an accurate diagnosis and repair.
I hope this helps! Let me know if you have any other questions.

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.

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.

How do I check if my radiator fan is broken?

Which can lead to more serious symptoms that we’ll talk about today the third symptom is having ac. Issues in idle or driving at lower speeds you’ll notice your car not getting as cold as it normally.

Why is my car AC fan not spinning?

There are usually three main causes of this: damaged cooling fans, an internal obstruction, or an electrical fault. If you suspect one of these problems to be the cause, book an appointment with a mechanic as soon as possible.

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 do I know if my fan relay is bad?

If the cooling fan relay has failed, you may see warnings, such as the check engine light and the temperature warning light, pop up on the dash, but first, you may notice that the A/C stops cooling.

How much does it cost to fix a radiator fan?

The average cost for a Radiator Fan Motor Replacement is between $689 and $733. Labor costs are estimated between $140 and $177 while parts are priced between $549 and $556. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.