Wind operated IR detector problem.

[Doodlebug]

Our burglar alarm triggered mysteriously a year or so back and I traced and checked all the wiring and couldn't find any problem. Then I checked the sensors and found a small spider's web inside one of the PIRs. Spiders are apparently warm blooded creatures. I sealed up the wire entries to all my sensors and haven't had any repeat of the false alarm.

Peter

The poor ol' spider was all shut out in the cold.