The most recent starting cycles have shown a very slow warm up of my motor. Last night, and this morning, the needle did not even approach midscale until after I had been on the freeway for several miles. I live two miles from the freeway onramp, and my temp is normally to midscale before I get there. Today, the scale was only about half way between stone cold and midscale, and perhaps below (colder) than that. I got onto the freeway, and the needle remained pretty much stuck in place for more than 5 miles, then it suddenly began to move to midscale. Once it started going, it went to its normal reading.
My inclination is that the tstat is stuck open. Any other thoughts?