Question about 1994 Volvo 940

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My AC fan is inop. Fan fine when powered directly. Switch ohms out correctly. Fuse is fine. What else?

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  • sk67197 Jul 03, 2010

    I assume so but where does it live? Wiring diagram I have shows nothing about it.


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Fan relay????

Posted on Jul 03, 2010

  • GetMeOttaHere Jul 03, 2010

    The electric fan switch, or thermal switch, can be checked by placing the element in a bucket of water using an ohmmeter. Heat the water to approximately 207°-216°F (97°-102°C) and connect the switch leads to an ohmmeter. The switch should have no continuity until the temperature reaches this level. Let the water cool off below 207°F (97°C) and the switch should lose continuity. If the switch has no continuity at any temperature, replace it.


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