Broken and/or inaccurate.
One thing is being broken here: your thermometer, or the laws of physics. I see no reason to believe the latter.
If you take an object and put it somewhere where there's a temperature difference, then heat energy flows from the hotter object to the colder object until the two are the same temperature. That's all that happens. That's how the energy wants to flow, and in order to fight against it, in order to cool an object even further, requires a lot of energy spent in something like refrigeration. A fan is not a refrigerator. 20°c air is 20°c air. 20°c air being blown by a fan is still 20°c air. If you cool that air with refrigeration, then blow it, you can cool it further, but again, a fan is not a refrigerator.