On Mon, 23 Aug 2010 02:29:34 +0100, Alan wrote:

In message , Bob Eager
wrote
On Mon, 23 Aug 2010 00:36:18 +0100, Alan wrote:

Some CO detector elements only have an operational life of a 2 or 3
years while the electronics last considerably longer. The test button
only checks the electronics and the battery. The detector element may
have already failed due to old age.

Mine is suppose to have a 5 year operational life, after which it warns
continously and cannot be reset.

Does it actually detect that the detector element has failed or does it
just have an elapsed "time on" timer set for 5 years?

Elapsed timer.



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