Saw a recent post that reminded me of a question I wanted to ask the combined knowledge here.
My oil temp sender has been acting wonky the last few years, and I have assumed it was a failing sender, but wanted to see if others agree. Car is a 74 model that gets about 1k miles a year on it. It is likely the original sender and starting about a year ago, if the engine was cold, the gauge would peg full temp when first running the car. After it warms up (about 10 minutes), the gauge then reads normal. I have assumed that the thermocouple inside the sender is open circuiting when it is cold and then reconnects when it gets a bit warm.
Is this a typical thing that happens when the sender begins to fail?