I've had a 02064 station running for a year, and almost to the date of a year the receiver stopped getting a signal from the sensor. Nothing had changed, so I replaced the batteries to no avail. I've reset the receiver, changed channels, etc and haven't had any luck. The units are right next to each other (indoors) now as I test but the units never manager to communicate. I've of course confirmed the batteries are installed properly and are working as well. The QC sticker inside says 3517.