On our 4.8is, the tstat has a sensor. That sensor technically measures when the tstat fails. I know this because I had it happen. It was a ridiculously simple job on the 4.8.

That being said. Does your car take a really long time to warm up in the morning. That is also an indication of a failed Tstat.

I also question how these mechanics know you have a failed tstat. If there is no code for it, how did they come to this conclusion?

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2006 4.8is, Black on White. SOLD Sniff Sniff.

2017 F85 x5m, Black on Red. BEAST MODE


"The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain

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