Should clutch fans spin freely when cold?
If you try to spin the fan, the fan is tight and will not spin freely even when cold. In fact, it’s just as tight when it’s cold as it is when it’s hot. If the fan rotates more than five times, you can bet the clutch is bad.
When does a fan cluthc turn on or off?
With a fan cluthc your fan will rotate constantly regardless. The clutch engages and locks the blade to it so that it spins faster than normal the hotter that it gets. The only time that your fan will not spin is when the motor is off. It is a common misconception that the fan will only spin when…
When does the a / C fan only come out warm?
When the fan is set to the highest setting, it only comes out warm. This happens regardless of a/c or max a/c setting, regardless … When the a/c fan is on any setting other than the highest setting the air comes out cold. When the fan is set to the highest setting, it only comes out warm.
Why does my fan spin faster when the motor is off?
The clutch engages and locks the blade to it so that it spins faster than normal the hotter that it gets. The only time that your fan will not spin is when the motor is off. It is a common misconception that the fan will only spin when the clutch engages.
Why does the air come out cold when the a / C is on?
A/C is cold until the fan is on high, then it’s warm. When the a/c fan is on any setting other than the highest setting the air comes out cold. When the fan is set to the highest setting, it only comes out warm. This happens regardless of a/c or max a/c setting, regardless of fresh or recirculated air, and regardless of car speed.
When to turn on the thermal fan clutch?
The thermal fan clutch will be engaged for a short period of time during engine warm up. This length of time depends upon the duty and/or specifications of the vehicle tested. When air temperature is sufficient enough to activate the bi-metallic spring, the fan clutch should engage.
What’s the difference between standard and heavy duty fan clutches?
Standard-Duty Thermal Fan Clutch: This design turns the fan at 60-70 percent of the water pump shaft speed when engaged, and 20-30 percent when disengaged. It’s made for fans with a lighter pitch. Heavy-Duty Thermal Fan Clutch: This fan style turns the fan at 70-90 percent of the shaft speed when engaged for increased cooling.
When the fan is set to the highest setting, it only comes out warm. This happens regardless of a/c or max a/c setting, regardless … When the a/c fan is on any setting other than the highest setting the air comes out cold. When the fan is set to the highest setting, it only comes out warm.
What are the symptoms of a bad or failing fan clutch?
As the fan clutch is a cooling system component, any issues with it can cause overheating and other issues. Usually a bad or failing fan clutch will produce a few symptoms that can alert the driver of a potential issue.
Should a fan clutch have play?
It should be close to zero play. That amount of wobble is going to take out your water pump pretty quick.
How can you tell if you got a bad clutch fan?
To confirm the diagnosis, start with this simple test: Spin the fan as hard as you can on an engine that has not been started that day. If the fan rotates more than five times, you can bet the clutch is bad. You should feel some resistance and the fan may spin up to three times, depending on the ambient temperature.