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Thread: How to check oil temp sensor

  1. #1

    How to check oil temp sensor

    On my last flight the oil temp registered between 117-134F. It was during a three hour cross country flight. Previous flight was 2.5 hours and oil temp was right below 180F. Before I install an oil cooler shutter how can I check the oil temp sensor to confirm it is registering correct temp? I have a dual AFS 4500 EFIS system.

  2. #2
    Advanced Flight Systems Shawn McGinnis's Avatar
    Join Date
    Sep 2012
    Canby, OR
    The oil temp sensor is nothing but a resistor that changes according to temperature so they very rarely go bad. Most of the time the errors are attributable to your engine ground and the alternator ground path as well.

    Sometimes is the probes ground itself:
    Shawn McGinnis

    Advanced Flight Systems

  3. #3
    Thank you Shawn. Will check that out tomorrow.

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