Join Date: Jun 2006
Location: San Francisco Bay Area
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Originally Posted by jeromep
Thermometer accuracy has a lot to do with where the probe is placed and under what conditions. A bank thermometer may not necessarily be placed in a position where it is receving a correct ambient air temperature. A thermometer or probe placed in an enclosure may prevent an accurate reading by shielding the probe from significant changes in temperature or by absorbing heat and then continuing to radiate that heat in the presence of the probe as the outside temperature drops.
I think that Toyota has done a good job of shielding the on board temp sensor from temperature readings that may be generated by solar heating, however that same protection of the sensor prevents it from quickly reporting major temperature changes, like driving out of a parking garage basement to a hot day. You go from a 70 degree environment to a 90 degree environment in a matter of seconds and the probe doesn't sense the temp change for many minutes.
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