The situation is as follow:
When used to measure body temperature, my infrared thermometer will always measure an abnormal high temperature in ONE certain room (40/41 degree celcius), but it will always measure a normal temperature outside of that room (36/37 degree celcius). This is tried on multiple different persons with different room temperature, with multiple distances of measurement on the forehead.
I own two infrared thermometer of the same brand and model (JPD-FR202). And both would only behave abnormally in that single room. The room has an air conditioner and a computer. When tested, both the air-con and pc are turned off.
Is there any wave or radiation that would affect the accuracy of an infrared thermometer? Or are there any other scientific phenomenons that I should look into? Or would it be more reasonable to assume that I own two thermometers of a faulty patch?