Are factory installed car thermometers accurate?
Only the rectal ones.
Oh THAT'S that little thingie in the tailpipe! I always wondered.
Usually it is in the front grill as far forward as they can put it. Heat from the radiator *should* only be an issue when the vehicle is not moving and the radiator fan is off. Some manufacturers do a better job of pulling this off than others.
Ours seem to be. They are usually within a degree or two of what our home weather station and heat pump sensor read (and those two almost always match).
Digital thermometers are generally pretty good and hold their calibration well.
In the case of a factory installed outdoor thermometer in a car, the reading will typically be high for about 3 minutes after starting the car if it had been parked for less than an hour. This is because the sensor is usually in front of the radiator
And it takes a few minutes of driving to get enough air blowing past it to cool it back off to outside temperature.
Can't say I've ever tried to find out.
Ours is consistently 3deg higher.
What factory did you go to?
I would go with this explanation.
The one in my truck is usually within 1-2 degrees of what is reported on the news, so I said yes.
Answered yes but not sure as we don't have one in our car.
I'm not sure either. I'm curious about the consensus :)
I assume the airflow will cool the thermistor. Is it a uniform rate to which it can be be calibrated? Never been able to figure out where it's located in my car. Always reads 4F high.
What is "accurate"?
Wow, thank you for the explanation! I appreciate it :)
Properly representing the outside temperature? My grandma keeps telling me it's been 113 here, which is not true as it hasn't been over 110 this week. Kind of along those lines.