RearView Mirror Temp gauge problem

I've had the opposite. Gauge starts hot and cools off 5-10 degrees as the temp in the car cools. Don't know what's wrong with yours.

Same Problem

I've had the same problem, when the truck is idling for a long period w/a/c on the temp gauge goes way up. The a/c even starts to not work as well. When the truck moves again everything goes back to normal. It must have to deal with the a/c and it working best when the truck is moving, when I go in for the new brakes I'll add that to the list for the dealer to look at.......

Gauge works - it's just a matter of getting air circulating over it to get an accurate temp vice getting an inside the skin of the car temp. Drive and it should cool down. I've driven several different makes of cars and they all spike when sitting still -whether it is idling in a parking lot, or when you turn them on after being parked in the sun for hours.

If it's any consolation, you can probably do some research on weather stations for scientific research - most specify a requirement for circulating air, but out of the wind. From a weather discussion site: The perfect setup would have the temp sensor sheltered in a white, fan-aspirated shield, 4-5ft above grass, in full sunlight, and a safe distance away from any objects that could absorb/reflect the sun's rays.

The sensor is in front of the radiator, behind the grill. When you are sitting still there is little or no air flowing past the sensor, and engine heat will cause the temp to go up.

92TripleBlack said:

I've had the opposite. Gauge starts hot and cools off 5-10 degrees as the temp in the car cools. Don't know what's wrong with yours.

Click to expand...

Must be because I don't sit still and start driving immediately. I also park in the sun (Florida, go figure) so by moving I cool it off.

I was told by the dealer the first time that the sensor that reads the temp onto the rearview mirror is inside the car, in the middle of the windshield, and that it was registering as acurate by one of the techs. This weekend it got to be about 98 outside, and sitting in the shade, A/C running, the temp showed 129. I tried the same with the A/C off, and it registered 126. This was on 2 different days. I will be visting the dealer for another issue this week, and i am going to push for them to test it more. It did NOT do this when i first bought it.

The dealer is incorrect. That little dome sensor in the center of the dash is a light sensor for the auto headlights. The temp sensor for the mirror is behind the grill, in front of the A/C condenser.

good to know i dealer does not know what he is talking about. It was a service adviser who said this, i'll go back this week and see if i can get it squared away.
Just an annoying to see 130 degree's out, when it's really 100. Mind plays tricks on you.

madamadness said:

I was told by the dealer the first time that the sensor that reads the temp onto the rearview mirror is inside the car, in the middle of the windshield,

Click to expand...

Some Nissan techs are really stupid!!! If the sensor is inside the car, how does it measure the temperature outside?

stupid SA

Campfamily said:

Some Nissan techs are really stupid!!! If the sensor is inside the car, how does it measure the temperature outside?

Click to expand...

I agree 110%. I have only had one service advisor who had multiple brain cells to rub together. All the rest, well... :airhead:

Worst problem is that I can't get the SA to write down what I say only what they hear

Not just Nissan Techs

I had a GM service writer tell me that brake fluid coming out of my 1ton truck master cylinder was "normal seepage". I had to remind him we were not talking about my windshield washer bottle and this was about my BRAKES! This guy was a lawsuit waiting to happen