What can cause a cooling fan not to come on?
Six things may prevent an electric cooling fan from coming on:
- 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.)
- Bad fan motor.
How do I know if my cooling fan switch is bad?
The best way to tell if your cooling switch is faulty is to listen to your engine while you drive. You know how your engine is supposed to sound, and if you notice that you don’t hear the fan as often as you normally do during your afternoon commute, you might have a failing switch.
When should your cooling fan turn on?
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.
Is it normal for radiator fan to turn on?
To avoid a further rise of temperature, the fan induces air flow. The fan turning on is normal and a consequence of the hot coolant, not a cause. The coolant may not be moving due to a water pump problem, blockage in the radiator or hoses, or a stuck valve, i.e., the “thermostat” in the coolant line.
Do both radiator fans turn on at the same time?
The answer to your question is yes both fans will run when your at 230 degrees, if you have the parking lights on and your at 212 degrees one fan will come on, and when you have the air conditioning on you have one fan on as well.
What happens if a car fan stops working?
What happens if the cooling fan stops working? If your cooling fan stops working, your engine could overheat. This could cause damage to your engine parts. It’s a serious issue and needs to be looked at by a garage.
When to turn on the coolant fan switch?
As engine temperature rises to a specific threshold, the switch is activated powering on the coolant fan. The coolant fan will continue to run until the engine temperature cools down to a specific predetermined level.
What are the symptoms of a bad thermo coolant fan switch?
Several symptoms may point to a bad or failing thermo coolant fan switch. 1. Engine overheating Engines generate an enormous amount of heat and as a result are subjected to very large temperature swings if this switch does not operate effectively.
Why are the cooling fans not working on my car?
Many other issues can cause the engine to run hot or overheat. Rather than uncommonly high engine temps, the driver may notice that the cooling fans have stopped running. A faulty or broken relay cannot deliver power to the cooling fans. In turn, the unpowered fans won’t run, leaving the radiator to its own devices.
When to turn on the cooling fan relay?
The cooling fan relay is an electromagnetic switch that controls the power supply to the engine’s cooling fans. It ensures that the energy-intensive devices only run when needed, usually when the vehicle is immobile. When the engine temperature approaches unsafe levels, the vehicle’s computer or temperature switch turns on the cooling fan relay.