Fan sounds like a plan taking off

Asked by Swan9206 Apr 11, 2020 at 11:30 AM about the 2007 Mercury Mountaineer V6 Premier RWD

Question type: Maintenance & Repair

07 Mur Mountaineer 4.0 V6 RWD
I have replaced the radiator a while back and now more times then not the
fan sound like a plane taking off . i idles fine and as the rpms increase so
does the whooshing sound of the fan, This comes and goes . at times i see
the temp needle increase as the sound is happening but doesnt get to high
and then settles back to normal within a minute .

I swear it is electrical the way it comes and goes , is there sensors or
controllers /i need to be looking at . everytime i bring it to the shop it never
acts up

2,230

RickMN answered 4 years ago

Your radiator fan has an electrically controlled clutch. First make sure that you plugged the clutch back in after replacing the radiator. If it still makes noise, get a shop manual and check the electric clutch operation

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Swan9206 answered 4 years ago

the radiator install was a few months back and everything was fine after . this a new problem and been looking into the Coolant Temp Sensor - Ford (3L8Z-12A648-A) which i believe controls the fan

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