Was driving earlier this morning and then I noticed the Check Gauges light came on, noticed that the temperature gauge was at max heat. Before I could take a second look the light was gone and the temperature was reading normal. Just now it happened again.

Just wanted to make sure but this is a sign of a bad tstat right?

Thanks

i bet its not the tstat its self but the gauge or sending unit.

^^ agreed. Bad stat would not drop temp that fast no matter what. Its got to be the sending unit

Okay well it happened again this morning, light came on and it was at max heat but it was on for about 10-15 seconds this time. Then the light went out and it went back to normal. Where about is the sending unit located and any idea how much it's gonna cost me?

Thanks

Temp sending unit is located on the intake manifold, right behind the thermostat. It screws into the manifold. I replaced my own sending unit when I installed my 180 degree thermostat. I bought it at Advance for about $20.00 but that was several years ago.

When I installed my 180 tstat I saw that the end of the temp sending unit had cracked pretty badly. It was not broken off, the element was still intact and the temp gauge was still reading OK but maybe yours has a cracked sending unit too, which could possibly be causing the temp gauge problems.

Edit: Here is a link to the Advance sending unit web page:

http://shop.advanceautoparts.com/web...hedFrom=header

Jimmy

I had a similar problem with my truck this summer, it would do it very randomly then became more persistent. I replaced my t-stat and haven't had a problem with it since.

Thanks for the replies guys.

I was actually thinking of switchin to a 180T so I may just replace both of those.