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Thread: Fan Issues

  1. #1
    Tuner in Training
    Join Date
    Nov 2007
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    24

    Fan Issues

    I converted my '07 Trailblazer SS to e-fans (Corvette PWM style). The problem is the fans are not coming on till 217 degrees. They will slow as the temp drops but based upon the below they should be coming on at 192.

    Anyone have any thoughts?


  2. #2
    HP Tuners Support
    (foff667)
    Bill@HPTuners's Avatar
    Join Date
    Jun 2004
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    Hailing from Parts Unknown
    Posts
    28,266
    Please post a scanner log while logging fan status as well as your .hpt tune file.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  3. #3
    Senior Tuner
    Join Date
    Jul 2004
    Posts
    1,579
    From what I recall, anything past 91% desired fan speed equals both fans on at high speed. Below 90% is low speed for both fans, so your fans are not set to come on to high speed until 207 degrees. Otherwise they are on at a lower speed. Good luck!