X-10 4080XT Motion Detector Floodlight

[dick]

I am a heavy user of the subject Motion
Detector...and, as of late, I am running
into a quality problem.  When subjected to
Wisconsin winters, my units refuse to shut
off after the normal timein period.  I have
to shut them off with a manual controller.
This problem usually surfaces after about 6-
mos of operation.  Anybody else having a
similar headache ??