Hey guys im having a problem with my fans coming on first i wanted to see if cold air comes out wheni turn the ac on but no luck then i turn it off and let it sit there and it got on the red mark i shut ut off n it boiled like hell,then i turn it on n put the ac on and then off and my fans came on hi speed n turn off at 226 now why did my car do this should i change the sensor on the water pump

 

Got worse when i got home from wrk i look at the car and ran the car as the temp climbed up the fans never came on it got to the red low or high speed never came on the fuse is good and the motors for fan r new[EDIT] car is pissing me off

 

Hook up a scanner, so you can see what temps are being read and what the fan status is.

4th Gen LT1 F-body Tech Articles

 

Hey rob when i removed a wire for the ses light to come on the fans came on so i kno the motors of the fan work,i wouldnt need a scanner bc at the temp mark the needle is at the red and when shut the car off boiling like a tea kettle im thinking the sensor on the water pump is out,but will that throw a code?

 

That's why you need a scanner to look at the temp the PCM sees.

 

Turns out it was the sensor on the water pump now the fans come on properly