Question about 2003 Cadillac Deville

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Car is running hot and coolant fans not running

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This is a fairly easy fix, just takes a little trouble shooting. first ensure all wires and connections are in good shape. if that checks out ensure all fuses and relays are in working order. if all that checks out then its only one of two problems. 1. the fan switch runs on a seperate temp sending unit and its gone faulty 2. the fan motor is at fault. you can check the fan motor by jumping the switch and running a direct power source to it. if it runs then its a sensor or other problem. if you need it fixed on the cheap run an alternate power wire and install a switch inside the cab, when you seen the temp rising turn on the switch manually and off again when it cools down. or you can track down the appropriate sensor and replace it.

Posted on Oct 15, 2013

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Check thermostatic valve and temperature sensor.

Posted on Oct 15, 2013

  • Susan M
    Susan M Oct 15, 2013

    how do i check it

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SOURCE: Car runs hot but doesn't leak coolant until park

water pump, heater core

Posted on May 12, 2011

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