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Why my radiator fan is not working?
Defective temperature switch, coolant sensor or other sensor. Engine thermostat is stuck OPEN (engine never gets hot enough to turn on the fan) Faulty fan relay. A wiring problem (blown fuse, loose or corroded connector, shorts, opens, etc.)
When should radiator fan come on?
about 200 degrees Fahrenheit
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.
How do I know if my radiator fan is not working?
The first part to check is the fan wiring when the fan isn’t working. Start by unplugging the positive and negative feed wires (should put out approximately 12 volts DC). Then, check to see if there’s current available with a voltmeter. If not, take a look at the wires and the fan relay under the car’s hood.
Why is the radiator fan not working on my Honda?
Your engine runs well, but you notice the temperature reading is running a bit higher than normal on your temperature gauge. You also no longer hear the reassuring sound of the radiator fan kicking in when you pull into your garage.
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. If necessary, a replacement thermo switch costs between $10 to $40.
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 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.