this post was submitted on 21 Feb 2025
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hmmm
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Point it at the wall right next to it and see. I've noticed this on mine but it will match with the wall. The reflective comment could be. I've always assumed that it has to account for the slight heat that the thermostat generated just by running. My experience is with an ecobee smart thermostat so probably generate a a bit more heat.
I have an IR camera adapter and pointed it at a computer fan. I was astonished that the motor in the middle was warmer than the blades, although the fan was off for a long time. Then I saw that it measured the reflection of my head in the name plate.