The tower door chime stopped working a few weeks back. The sensor, when examined, was wet inside and its electronics were corroded. It proved impossible to clean it sufficiently to make it work again, so a replacement was ordered, and installed when it came in this week.
On the theory that the moisture was rain water that had leaked in between the frame and the door, several steps were taken:
- A line of folded duct tape was run across the top of the frame to deflect water coming in (visible in photo above).
- The holes for the mounting screws were gasketed, again with duct tape.
- The sensor was mounted not flush to the door frame, but with an air gap of about 3mm with a second water deflector made from stiff plastic.
We’ll hope this one keeps working over the long haul.