Diyvehiclerepair
- What causes a cooling fan not to work?
- What controls the electric cooling fan?
- Where is the cooling fan sensor located?
- Why do electric fans stop working?
- Can a bad thermostat cause radiator fan not to work?
- What sensor controls the radiator fan?
- What happens if you unplug the coolant temp sensor?
- How do I know if my radiator fan motor is bad?
- What fuse controls the AC fan?
- What is the radiator fan fuse called?
What causes a cooling fan not to work?
ELECTRIC COOLING FAN PROBLEMS
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.)
What controls the electric cooling fan?
The PCM controls fan operation; it uses the signal from the ECT or engine coolant temperature sensor. This sensor senses the temperature of the engine's coolant and sends a variable voltage signal to the PCM. The PCM operates the fan motor through the engine's cooling fan relay.
Where is the cooling fan sensor located?
It is most often located close to the thermostat of the cooling system or inside of it. The cooling system is located beneath the air intake pipe and behind the right cylinder.
Why do electric fans stop working?
A dried out or sticky pin is one of the most common reasons for blades to stop spinning. If they spin easily and there's no resistance, try turning your fan on and see if the pin spins. If it doesn't, the problem isn't the pin and there is probably a short in the motor.
Can a bad thermostat cause radiator fan not to work?
Broken Thermostat
Thermostats are known to go bad and cause all sorts of cooling issues. ... If this thermostat doesn't open when the engine reaches the working temperature, the coolant will stay inside the engine block and the engine will start to overheat. This will result in the radiator fan not working.
What sensor controls the radiator fan?
On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor.
What happens if you unplug the coolant temp sensor?
What Happens If You Unplug The Coolant Temp Sensor? Unplugging the engine coolant sensor while the car is running will likely cause the engine to stumble and run rough. The engine light may not come on imminently, but a DTC (Diagnostic Trouble Code) will be logged in the PCM.
How do I know if my radiator fan motor is bad?
The most common symptom that the radiator fan has gone bad is that it will stop working. Sometimes the motor burns up or fails. Other times, the relay stops working. Either way, you know there is an issue with the fan system if it is unable to run.
What fuse controls the AC fan?
To protect the blower motor power circuit, a 20-, 25- or 30-amp fuse is usually located in the fuse panel under the dash. The rating of the fuse will depend on the vehicle application and how much power the blower motor requires at full speed.
What is the radiator fan fuse called?
The cooling fan relay is normally located in either the underhood fuse and relay center or mounted to the electric fan assembly behind the radiator.
