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fans wont work

This is a discussion on fans wont work within the General Help forums, part of the LSx Technical Help Section category; i have changed my coolant sensor on the head. with it plugged up the fans dont come on.with it unplugged ...

  1. #1
    Junior Member phil85's Avatar
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    1998 z28

    fans wont work

    i have changed my coolant sensor on the head. with it plugged up the fans dont come on.with it unplugged they work and the car runs cool but i dont know for sure because the gauge doesnt work when i do that. the plug in is getting power what else could be the problem. i have changed 1 fan relay that was not working.

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    Member cancam99ss's Avatar
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    Look at my post I have the same issue let me know if someone responds....

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    Junior Member phil85's Avatar
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    mine was running about 210-220 then cooling down when the fans would work.i have changed water pump,t-stat,and the coolant temp sensor,and the #3 relay. dont blow smoke and radiator doesnt boil over,gauge only shows hot. is there another sensor or switch. if it keeps up im going to install a toggle switch for the fans.

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    Moderator Cutlass's Avatar
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    You should monitor the engine coolant temp with a scan tool so you know how warm the thing is. The Low speed comes on at 226 degrees, high speed comes on at 234 degrees.

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    Junior Member phil85's Avatar
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    that could just be the case. i dont like seing it get over 210-215 so i unplug the sensor. what is a normal operating temp for a high mileage ls?or at what temp should i begin to worry?

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    Moderator Cutlass's Avatar
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    You don't have to worry about damage until say 250 degrees or higher. If you want it to run cooler, consider installing a 160 or 180 degree t-stat and having the computer reprogrammed for the fans to come on earlier.

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    Junior Member phil85's Avatar
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    that sounds like a plan.i was thinking the exact same thing earlier

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    Moderator Cutlass's Avatar
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    You could also keep your current t-stat and have the computer tuned for cooler fan temps.

  9. #9
    Junior Member phil85's Avatar
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    thanks for the info cutlass, im deffinatly going to do that

  10. #10
    Member cancam99ss's Avatar
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    Look at my recent posts... My fans weren't working you can do one of two things replace the motors that cost $41 at advanced auto or brand new ls1 fans ... I got new fans and now she is running great glad it's fixed

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