Temp Gauge or Temp Sensor problem?

[3vilE30]

I've searched and haven't found a specific problem with the temp gauge as mine. Basically when the motor is running the temp gauge sit as it does when the car is off. However, if I turn it off after its been warmed up just to the on position it'll show actual temp then when I start the car the temp gauge will go back down and MAYBE it'll feel like working after sometime.
Btw car is a 1988 super eta, I don't have over heating issues as well.

[FLG]

Would try removing the cluster and cleaning the grounding nut on the back of the gauge. Gas and temp gauges get testy if this nut is loose or corroded

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[jlevie]

That is most likely a problem with the cluster, it's ground, fuses, or SI board.