I've had this 5-in-1 dual panel sensor for less than a year, and for the past couple of months the temps have been reading 10-15 degrees too high in direct sunlight. It normalizes once the sun sets. I've reset it, and that doesn't help. I think the fan is either not spinning some of the time or spinning too slowly to do any good (I took the cover off of it and had to manually spin the fan to get it to go once). But today I can hear it spinning, yet the temp is still reading about 10 degrees too high. This appears to be a common problem. Any help would be appreciated!