Kidde P4010ACS: lights, beeps & chirps explained
Hardwired photoelectric smoke alarm with voice, sealed 10-year backup. Here is what every light and sound on the Kidde P4010ACS means, how to test and hush it, and when it needs replacing. It's an older model I still find on ceilings across the Lower Mainland.
What the lights mean
| Light | Meaning |
|---|---|
| Green, steady | Running on household power (lit room). In the dark it blinks every 60 s instead. |
| Red, blinks every 2 s | Hush mode (up to 10 minutes). |
What the beeps and chirps mean
| Sound | Meaning |
|---|---|
| 3 long beeps, repeating | SMOKE. Get everyone out and call 911. |
Want to hear them? The free app's sound library plays each pattern.
How to
Hush
Press the button to quiet a nuisance alarm for up to 10 minutes. It announces hush mode. Heavy smoke overrides hush.
How long does it last?
Replace it 10 years after the date printed on the back. The test button can still work after the sensor has worn out, so the date is what counts. Sometimes the date is on the side, but the back is the best place to look. Need one swapped? See smoke alarm replacement and repair.
What replaces it
Today's replacement is the Kidde 20SA10-CA ($69.99 installed, plus the $99.99 service fee).
Other alarm guides
Kidde 30CUA10-VCA · Kidde 30CUD10-CA · Kidde 20SA10-CA · Kidde 20SD10-CA · Kidde 900-0235 · Kidde i12010S · Kidde i12010SCO · Kidde i12040ACA · Kidde 900-0220CA
All alarm guides · Chirp codes: Kidde vs First Alert · Kidde smoke alarms in Vancouver