hi, i have a 2001 monte carlo ls 3.4L. just got a head job done, radiator rod out temperature sensor and thermostat changed. it seems as if my fan takes to long to come on. fan comes on about 3/4 but so far hasn't gone to the red, especially when it's in idle position. please help.

 

Was the system fully bled of all air when the work was completed?

 

I'm gonna have to go back to the mechanic to let him bleed it if he hasn't. Thanks alot.