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Temp Guage shows warm engine before start up 900 1994

posted by  j.pelchat on  Sat Feb 10 07:58 CST 2018
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last visit: Fri Oct 24 07:02 CST 2014
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When I turn the key to on with cold engine, the temp gauge on the cluster goes to 40%, sometimes 50%, immediately. It goes up normally as engine heats and settles to the normal 50% in a timely way. Coolant system all seems normal, no record of a sensor change within the life of the car.

Any experience with this? could it be gauge sensor or the gauge itself? The sensor connector was treated during normal maintenance.
--
89 240 wagon, 94 940, 300K, 94 940, 141K








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    Temp Guage shows warm engine before start up 900 1994

    posted by  j.pelchat on  Sat Feb 10 08:58 CST 2018
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    last visit: Fri Oct 24 07:02 CST 2014
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    Always a treat to get a reply from Art

    Removed connector under #2, turned car on. Same 40% on needle. Treated the connector and replugged. Car on again, went to 40%, Tapped around the gauge and it went to zero and has stayed there since. Suspect gauge/soldering. Will monitor
    --
    89 240 wagon, 94 940, 300K, 94 940, 141K








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    Temp gauge shows warm engine before start up 900 1994

    uid 27's pic
    posted by  Art Benstein on  Sat Feb 10 08:19 CST 2018
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    last visit: Fri Oct 17 20:10 CST 2014
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    I would disconnect the sensor, before starting the car, and note the behavior with it out of the circuit.

    Ordinarily I'd pass on the 9-series questions, as my experience with them is short-term and limited, but your thread title reminded me of my youth when I spent some time helping an older boy get into trouble. He would borrow his dad's car from his commuter train parking but of course we'd disconnect the speedometer cable. Dad knew though, because the gauge did not start out dead cold when he returned from the train.
    --
    Art Benstein near Baltimore

    "...but the plural of anecdote is data, right?" -drew







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