Why is my thermo fan not working?
The most common reasons a radiator fan is not working are luckily due to a blown fuse, bad relay, or a broken wire. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damaged.
What is a symptom of the radiator fan not working?
What happens when a radiator fan stops working? It will cause a loud whirring noise and a stuck open thermostat (which will not allow the engine to reach the average operating temperature). A lousy radiator cooling fan could cause a blown circuit fuse, a malfunctioning relay, and engine overheating.
When should thermo fans 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.
How do you test a Thermo fan switch?
Turn on the burner and slowly increase the water temperature. The ohmeter should be turned on and have a reading of high resistance. When the water reaches between 180 to 220 degrees Fahrenheit, the switch should turn on and the resistance seen by the ohmmeter should change to zero.
Can you drive a car if the radiator fan is not working?
Yes, you can drive your car without a radiator fan, but you never should. Your vehicle’s cooling system is crucial to its performance, and every time your engine overheats, you cause damage.
Does the thermostat control the radiator fan?
Does thermostat control radiator fan? The thermostat in the cooling system controls many of the electric fans. When the temperature in the engine reaches a certain preset temperature, the fan will begin cooling the engine. When the temperature dips below that preset temperature, the fan will turn off.
Can I drive without a fan clutch?
You will be fine, I had Trailblazer SS that I drove for 2 weeks with no fan while I waited for a tune update in the wintertime.
Can a bad thermostat cause fan not to come on?
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.