When 200 Appears on Your Carbon Monoxide Alarm's Display

Whenever you push the Test/Reset button on your carbon monoxide alarm, the unit will go through a series of numbers programmed to test its internal diagnostics.

This sequence starts with an 888 reading, then displays numbers usually in the 200 range, then back to 888, and finally back to zero.

These are not actual readings, so you should not be alarmed and do not need to take any further action.

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