Why is the radiator fan not working on my Lexus IS250?

Identifying the Issue with the Radiator Fan on a Lexus IS250
If the radiator fan on your Lexus IS250 is not working, there are a few potential causes that you can investigate based on the information available:
1. Possible Causes:
– Fuse and Relay Check: It’s important to check the 30A RDI FAN fuse located in the fuse box by the battery. Additionally, ensure that the fan relay is functioning properly.
– Voltage Check: Verify if there is 12 volts of power going to the fans. If there is no power, it could be due to issues with the coolant temperature sensor or the FAN relay #1 and FAN relay #2.
– Coolant Temperature Sensor: The coolant temperature sensor, located on the radiator, plays a role in activating the fan relays and starting the fans. If there is an issue with this sensor, it could be a potential cause for the fan not working.
– Fan Module Computer: Check the fan module computer located between the fuse box and the fans to ensure it is functioning properly.
2. Diagnostic Steps:
– Check if the fans come on when the AC is turned on. They should come on and stay on. If they don’t, it may indicate an issue with the 30A RDI FAN fuse or the fan module computer.
– Verify the voltage between the fan wiring to determine if there is power going to the fans. If there is no power, it could be related to the coolant temperature sensor or the fan relays.
3. Community Insights:
– It’s worth noting that the electronic cooling fan in the Lexus IS may turn on at times to keep the radiator at an even temperature, especially when the AC is on.
– Other Lexus enthusiasts have shared their experiences with radiator fan issues, such as fans not spinning after an accident, and have provided insights into diagnostic steps and potential solutions,,.
Based on the information available, it’s essential to systematically check the fuse, relay, voltage, and the coolant temperature sensor to identify the root cause of the radiator fan not working on your Lexus IS250.

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.

Why is my AC cooling fan not working?

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 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.

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.

Why is my radiator fan not kicking in?

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.

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.

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.

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.

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.