When i change my cooling fan switch do I have to drain my coolant first?

 

Like the plug that goes into the fan? Or the temp sensor that tells the fan to kick on?

 

The temp sensor

 

You don't have to drain it, but you have to bleed the air out afterwords.

 

Ok. Since the thermostat will be closed there should be no coolant in the lower hose, and I won't have to worry about coolant leaking out. Right?

 

When I did my thermostat there was coolant behind it and the sensor is behind the thermostat.

 

One other question...My radiator fan hasn't been coming on for over a year now, but the only reason I wasn't too concerned is because my car never overheats. I live in NY, so I'm, constantly in traffic, but the temperature guage is always at a normal level. Is it even necessary for me to fix the fan?

 

what do you think is normal?

 

Um, my fan decided not to work just ONE TIME and I ended up blowing my d15b7.

 

Normal = guage about half way.