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2006 f150 4.6 clutchfan does not engauge when a/c is turned on intermittently

(1990 Ford F-150)
in Lincoln, AL on August 11, 2011
intermittently will blow high pressure relief valve
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Popular Answer
on August 11, 2011
There is a fan duty cycling solenoid that needs to be inspected. But first, it is best to use a scanner so you can see if the power train control module is getting the A/C 'on' signal from the A/C module if it is in turn commanding the fan to energize.

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