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Thread: Radiator fans not coming on.

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    Radiator fans not coming on.

    What can cause my radiator fans not to come on?

    1992 TT. Already swapped the relays and checked the fuse, all are good. Yet even as my temp gauge gets up to 230F the fans dont turn on. Could both temp sensors in the radiator have gone out?

    Also the A/C turns the condensor fan on like its supposed too.
    "Speed has never killed anyone, suddenly becoming stationary… that's what gets you." - Jeremy Clarkson


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    Sorry, A/C turns on the condensor fan only, not both on low like it should

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    There are two different sensors. One for the gauge, and one to tell the fan(s) to kick on. If that one went bad, then that could cause your issues.

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    Quote Originally Posted by stealthee View Post
    There are two different sensors. One for the gauge, and one to tell the fan(s) to kick on. If that one went bad, then that could cause your issues.
    There are actually 4 on the 92's. 2 for the fans, (hi/low modes), 1 for the ECU, and 1 for the gauge. I jumped the fan motor with battery voltage, no spinning. Time to get a new motor to start with. Then on to the sensors if I have too.

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    If direct voltage did nothing, then you are on the right track to finding your problem.

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    LOL... I was trying to figure out WTF happened to my post...? Then I realized I had posted in a similar thread elswhere.


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    Have you unplugged the sensor to the PCM? The fans default to ON when you do.

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    Quote Originally Posted by x2xtreme360 View Post
    Have you unplugged the sensor to the PCM? The fans default to ON when you do.
    Not on a 1st gen...

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    Welp, nevermind then.

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    I had similar issue. after removing, cleaning, flushing that radiator. fans started to work again.
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