If the sun is hitting the IR sensor it may not work, it happens with most IR sensors on equipment. The sun interferes with IR signals if you shield the sensor from the sun does it work? Only working at night & sporadiclly kind of tips me in that direction. When I drive home from work the sun is at my back and the right angle to shine right on the face of my empeg & it won't receive the signal.

#695 Mk2 BLUE&GRN&PUR 12Gig