As many other people have posted, the temperature reading in direct sunlight is too high (it is not 110 degrees here!). My 5 in 1 unit is free from nearby obstructions and mounted in the open to a 7 ft. post. I've cleaned the unit and the fan is running. From the other posts I've read, it sounds like there's no good solution and that this unit just will not work accurately. Any other solutions? We paid a lot of money for this and I'm not happy that something as basic as temperature is inaccurate.