Temp gauge stuck at 175

[Gkrahn]

My 2006 tige 24ve temp gauge is stuck at 175 as soon as I turn the ignition on.

I grounded the two wire connector going to the temp sensor and the gauge stayed the same.

I also checked the back of the gauge and noticed the ground wire was loose so I tightened it and also grounded it directly to the battery and it stayed the same.

I installed a new gm sensor since it was cheap and because I’m also changing the water pump impeller and thermostat.

all of the other factory gauges work fine and after I start it, it will move up to around 200f and stay there.

ive used a laser thermometer and it’s usually around 175-180

[SONIC]

Sounds perfect as it will never overheat now

Sounds like the gauge is toast to me.
You can try different wires, there's a chance there's short somewhere between the sender and the gauge.

[cse80]

I've had my tach do that to me once or twice. It was actually reading much higher than it should have right at startup/idle. As I accelerated, it began to really climb. The solution...gave it a couple taps and it "unstuck" and settled in to its correct reading. Not sure if the temp gauge would work the same, but worth a try.

[25cents]

Same issue with my old tach. Seems like the needle is just stuck. I would replace the gauge. I e seen some that drill a small hole in the side and using a small tool move the needle back and forth to work it free. I’m not that patient. Haha

[Gkrahn]

I’ve measured voltage and the two wire plug at the sensor and the yellow wire has just over two bolts with key on. I only grounded the black wire on the plug

[Gkrahn]

I checked voltage at the back of the gauge and it is the same voltage as the sensor so it should be getting a good reading. I just finished installing a new 140f thermostat and water pump impeller and nothing on the engine went above 140.

does anyone know where to get a factory tige temp gauge?

[Gkrahn]

Yes I pulled a 140 out of it

[boatwakes]

140* is the incorrect thermostat for that engine. Remove and install the 162* otherwise you're going to be burning way more fuel. The computer doubles the injector pulse width up to 142* to help the engine warm up and those 140* thermostats should only be used on carbureted engines as a result.