Carbon monoxide readings.?

Hi, if you are in any doubt 1.check batteries. 2, get another detector,3, log onto "Trustcorgi.co.uk" & find an installer to check locally,,4 ignore the first three & die!!!! Sorry bit harsh i know but once it's in your mind better be safe than sorry. some of these detectors are not very accurate but in this day & age you can't take chances. Hope this helps:):):)