Why is the radiator not working on my Honda CRV?
If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your CR-V is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.
How can I tell if my radiator fan relay is bad?
Another easy way you can check if the radiator fan switch relay is bad is to swap the radiator fan relay with the condenser fan relay. If the radiator fan begins working, this is an indication that the fan relay is bad. If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step.
Why does my Honda Civic fan not run?
With the jumper attached, the fan should run continuously when the ignition is in the “ON” position. If the fan does not run, this is an indication that the thermo switch is faulty. If this is the case, you will need to replace the thermo switch. Figure 2. Location of thermo switch in a Honda Civic’s thermostat housing.
Why does my car have a radiator fan?
You probably already know the purpose of the radiator and the cooling system in your car. When you are driving fast, the wind is passing through the radiator to cool the coolant down without issues, but when you are driving slow, there is no wind pushed through the radiator. This is why we use a radiator fan.
Why is the radiator fan not working on my Honda CRV?
If your CR-V has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp sensor. Depending on the model year and engine, the location varies. If it does end up being this sensor, they are very affordable.
You probably already know the purpose of the radiator and the cooling system in your car. When you are driving fast, the wind is passing through the radiator to cool the coolant down without issues, but when you are driving slow, there is no wind pushed through the radiator. This is why we use a radiator fan.
What are the symptoms of a bad cooling fan relay?
1 Engine running hot One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. 2 Cooling fans do not function Non-functional cooling fans are another common symptom of a potential problem with the cooling fan relay. 3 Cooling fans stay on at all times
How can I tell if my radiator fan is working?
When a radiator fan works it usually makes a whirring sound that is easily noticeable. However, the radiator fan does not always start spinning on ignition. The ECU signals the radiator fan to work at the precise time. So, do not worry if the fan doesn’t immediately start working. Visually check the fan if you don’t hear its noise. 1. Broken Fuse
How to test if a Honda radiator fan is working?
Here is how to test if the fan is functioning properly: 1 Unplug the radiator fan connector. 2 Run jumper wires between the connector’s two electrical terminals. See Contact Test in Step 1. 3 If the fan does not turn on, you will need to replace it.
How to test the radiator fan relay circuit?
TEST 1: Checking The Radiator Fan Relay Power Circuits. Bypassing The Radiator Fan Relay . After confirming that the radiator fan relay is getting juice (TEST 1), the next step is to jumper circuits 1 and 2 with a jumper wire to see if the radiator fan motor comes on.
What does the thermo switch on a Honda radiator do?
If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot.
What should I do if my radiator fan won’t work?
If the radiator fan is in working condition, move on to the next step. The ECT sensor monitors the coolant temperature, and allows the fan to turn on if the coolant is too hot. If this sensor is faulty, a replacement costs around $25 to $45. Follow these steps to test it: Locate the ECT sensor, which is just below the distributor.
If the fan switch relay is giving off the appropriate readings and is in working condition, move on to the next step. The thermo switch (also called the cooling fan switch) sends a signal to the cooling fan, so the fan turns on if the coolant gets too hot.
How much does it cost to replace a Honda radiator fan?
Radiator fan testing points. If the radiator fan is in working condition, move on to the next step. The ECT sensor monitors the coolant temperature, and allows the fan to turn on if the coolant is too hot. If this sensor is faulty, a replacement costs around $25 to $45.
How does a Honda CRV keep it cool?
While going down the road the movement of air through your CR-V’s radiator will usually be enough to keep it cool, without the help of the fan. It’s when you are hardly moving that the radiator fan is going to do the work of keeping air flowing into the radiator.
What causes a Honda CRV engine to overheat?
If your CR-V’s engine gets hot enough, the coolant will begin to boil over and manifest itself as steam coming up from under the hood. It does this to relieve the pressure on the cooling system before lasting damage can be done to it. 3. Blown Head Gasket
How can I tell if my Chevy Aveo radiator fan is bad?
You can test the voltage going from the fan relay to the fan itself. If it is getting 12+ volts, the fan should be coming on. But if it’s not, which means the fan has gone bad. This video from Ratchets and Wrenches is a phenomenal resource on how to properly diagnose a wiring problem.
If the radiator fan is not working, it’s a serious problem. Just because the radiator fan is not on does not mean that it is not working. They are designed to only run when needed. If your CR-V is running hot, and the fan is not running we’ve laid out the most common causes of this issue below.
Where is the cooling fan switch on a Honda CRV?
This video also applies to other Honda vehicles with the 2.4 engine such as the Honda Element and Accord. In my case, as is the case a lot of the time, I needed a new engine fan temperature switch, which is located on the radiator. The part number for the switch I needed was 37760-P00-003, which is correct for UK made CRV’s .
While going down the road the movement of air through your CR-V’s radiator will usually be enough to keep it cool, without the help of the fan. It’s when you are hardly moving that the radiator fan is going to do the work of keeping air flowing into the radiator.
If your CR-V’s engine gets hot enough, the coolant will begin to boil over and manifest itself as steam coming up from under the hood. It does this to relieve the pressure on the cooling system before lasting damage can be done to it. 3. Blown Head Gasket