Why is my fan not kicking on in my car?
If the fan doesn’t come on, you need to look for a blown fuse or breaker. In older cars, you might have a fusible link – this is wire within an insulated block of rubber. Try to grab the end and stretch it. If the wire stretches, the wire link could be broken and you’ll need to replace it.
Can a bad temperature sensor cause fan not working?
A broken coolant temperature sensor can also make the radiator fan not work as well. When this sensor fails it may cause overheating in the process.
Can a bad thermostat cause radiator fan not to work?
If the thermostat is stuck open (allowing coolant to flow) it can cause the engine to run cooler than normal so obviously the fan wouldn’t come on..but not like the engine/coolant can be running too hot and the thermostat somehow effects the sensor reading or operation of the fan.
What are the symptoms of a bad cooling fan relay?
Bad Cooling Fan Relay Symptoms
- The engine runs hot or overheats.
- The cooling fans don’t work.
- The cooling fans keep running.
- Warning lights.
- Poor air conditioning performance.
- Swapping Relays.
- Measuring the Relay Coil’s Resistance.
- Listening for Noises.
How do I know if my fan control module is bad?
Symptoms of a Bad or Failing AC Fan Control Module
- Cooling fans running for a long time. The cooling fans under the hood of your car are designed to keep the components of the system at a lower temperature.
- Cooling fans not running at all.
- Weakened air flow.
What tells the cooling fan to come on?
The engine temperature should trigger the fan to turn on. It will also turn the fan off once the engine has cooled to under 200 degrees. You may have heard of a part called the radiator fan switch or temperature fan switch. This is linked to a thermostat and works much like your home’s HVAC system.
How do you test a cooling fan module?
The quickest way to tell whether or not the electric fan(s) are working is to start the engine; let it reach normal operating temperature and then turn the A/C on. The cooling fan in the engine compartment should turn on to pull air through the radiator and A/C condenser.
What are the signs of a bad temperature sensor?
Symptoms of a bad or failing coolant temperature switch (sensor)
- Poor fuel economy. One of the first symptoms associated with a problem with the coolant temperature sensor is poor fuel economy.
- Black smoke from engine.
- Overheating engine.
- Check Engine Light comes on.
Can a stuck car thermostat fix itself?
Furthermore, can a stuck thermostat fix itself? You can either replace the valves with new ones or work the valves back into a position where they can move up and down more freely. Replace the thermostat.