On my 04 SC MC, ive noticed lately the cooling fans arent turning on. I installed a drilled 180 a few months ago an put 2 holes on the thermostat. I was bleeding out my cooling system yesterday and I noticed that when my car hit 185 degrees my fans didnt turn on*my fans are tuned for that setting* anyways my fans turned on at about 200 degrees for like a minute then shut right off...could this be a bad thermostat or a bad temp sensor...there car isnt over heating but it is causing some kr when it gets hot

 

Did your fans used to work at 185? The tune could be wrong.

 

yea they would and even when i would turn the car off they'd be on for 30 seconds...it doesnt even do that anymore

 

so I put in a new temp sensor and a new 180 tstat and my fans are only turning on at 200 degrees...The guy showed me the fan settings for my tune an there set at fan 1 on temp is 181..fan 2 on temp is 183...idk whats going on??