Question about 1999 Ford Escort

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1999 Ford Escort SRS, 2.0L Single cam. Replaced cylinderhead due to crack by overheating, Cooling fan doesn't kick in.

Cool temp sensor replaced, Relay control module replaced. Cooling fan doesn't kick in at all at high temp and doesn't not kick in when AC is on. Fan works when disconnecting cool temp sensor plug from new sensor. What else could be the problem to the cooling fan?

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  • Ted Bierman
    Ted Bierman Dec 29, 2013

    If I'm not mistaken, the thermal fan switch would on the cooling fan itself, but the fan runs when connector is disconnected from the ECT when engine is hot.

  • Behind_Blue_Eyes
    Behind_Blue_Eyes Dec 29, 2013

    No, the coolant temp sensor is for the pcm, the thermal fan switch is for the fan relay... by disconnecting the coolant temp sensor you trick the pcm into over riding and turning on the fan

  • Behind_Blue_Eyes
    Behind_Blue_Eyes Dec 29, 2013

    Also, if I remember correctly you should have a cooling fan controller for the fan. Possibly next to the radiator or I've seen them behind the glove box. The little black box gets its signals from several different sources. PCM, TFS, Key on power, ac demand and thats about it. Searching for a thermal fan switch... But if it does not have one then I would suspect this cooling fan control module would be the problem... If it is, yo will need the number off of the old part to get the correct one... And yes, I have seen where Ford forgot one number which screwed everything up !!!

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  • Ford Master
  • 1,727 Answers

Have you bothered to check the thermal fan switch...

Posted on Dec 28, 2013

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Posted on Jan 02, 2017

wyatt1582
  • 453 Answers

SOURCE: Cooling fans will not kick in.

The fans won't kick on then you need to replace the coolant temp sensor this runs your fans.

Posted on Apr 22, 2009

  • 94 Answers

SOURCE: cooling fan relay

its not an actual relay is like a relay assembly

Constant Control Relay Module (CCRM)


The Constant Control Relay Module is located at the LH front of the engine.

Posted on May 27, 2009

adnanbhatti
  • 1188 Answers

SOURCE: Replaced cooling fan ,cooling fan relay, and 40

Did you check the parts before replacement? Check if there is power supply to the fan when engine is hot and the fan should start. Also check the temperature sensor or the automatic fan switch located below the radiator, it may be faulty.

Posted on Sep 15, 2009

Testimonial: "Thanks so much!"

  • 449 Answers

SOURCE: I have a 91 Ford

check the relay

Posted on Sep 05, 2010

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