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Thread: CHT difference

  1. #1

    CHT difference

    When I start my engine CHT3 does not climb as usual and shows lower temps.
    All 4 CHT's start with the same temp, only CHT3 climbs slower.
    After 3 minutes and alway with 180°F it goes in it's usual range and stay's accurate the rest of run up and flight.
    This happend on my last 15 flights. Before all was normal. (EE4500)
    Is this a sensor or wiring problem?

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    Lancair 390 OE-CCM
    AFS 4500EEA - AFS Pilot
    Austria / Europe

  2. #2
    Advanced Flight Systems Shawn McGinnis's Avatar
    Join Date
    Sep 2012
    Canby, OR
    The easiest way to tell is to swap the wiring of 1 & 3 at the probe connector. If the problem stays on 3 it's a wiring issue. If it moves it's a probe issue.
    Shawn McGinnis

    Advanced Flight Systems

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