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Low battery · Kidde · carbon monoxide

Kidde: “Lb” on a CO alarm display

A capital L with a lower-case b on the display is Kidde’s low-battery message.

What you see
No light named by the maker
What you hear
Silent

If it is sounding a full alarm instead: the maker’s emergency instruction

Carbon monoxide alarm

Kidde: a sounding CO alarm means carbon monoxide, which can be fatal. Press the TEST/RESET button, call 911 or your local fire department, and move at once to fresh air — outside or by an open door or window. Account for everyone, and do not go back in until emergency services have arrived, the home has been aired out and the fire department gives the all clear.

From What Should I Do When My Carbon Monoxide Alarm Sounds?.

Smoke alarm

Kidde: never ignore the alarm. First check for fire. If there is one, wake small children and leave at once by your escape plan — do not stop to dress or collect valuables; feel a door before opening it and use another exit if it is hot; stay low in smoke; meet at your meeting place; call the fire department from a neighbour’s house; do not go back in until the fire department says it is safe.

From What to Do When Your Smoke Alarm Sounds.

What Kidde says to do about this signal

  1. Replace the battery.

From Why Is My Carbon Monoxide Alarm Beeping or Chirping?. If your alarm’s pattern is not exactly this, check the manual for your model: Kidde models do not all use the same signals.

Other Kidde signals

Sources

Every line on this page comes from Kidde’s own documents, read on the date shown. Nothing is taken from third-party code sites or other makes.