<!-- from fixya rte -->Why is my GE smoke detector chirping - GE ESL 521BXT 2Wire Photoelectric Smoke Detector

Could take weeks before the battery finally gives out, depending on the quality of the battery.

Hello, Julie -

1. Try removing and resetting the new battery in the smoke detector.

2. If the smoke detector still chirps, I suggest just purchasing a replacement smoke detector unit.

We have a "main" smoke detector (along with others inside bedrooms and in corridors.) When the "main" smoke detector chirps, we have found we have to replace it, with a fresh battery, entirely. To make sure we purchase the right unit, we remove the entire thing from the ceiling mount and take it to the hardware store.

Best wishes.

The chirping must be coming from some physical object. Sometimes it can be difficult to locate a chirp. Maybe there is a CO detector nearby. Those chirp also.

Only the smoke detector will chirp. When they begin chirping it means the battery is very low and needs to be replaced. Replace it and you will find the chirping will stop as it will when the battery is totally dead.

A chirping smoke detector indicates low battery! Change battery or replace smoke detector!

try inserting aluminium foil around the smoke detector to shield it from radio frequencies leaving only the holes uncovered to let moke in and sound out.

Look at the detector you removed, and all others that may still be wired in.
They all have battery backup. Although the detectors are hardwired, the chirping is coming from one of the detectors to let you know to change the battery.

This is not a beeping smoke detector. It is probably a CO detector that was installed by your alarm company. GE model 240-COE will give a double beep every 5.5 minutes when the device reaches end of life. Call your alarm company to have it replaced.

Most smoke detecotrs have a limited lifespan of 5-10 years. On the underside of the detectors should be a sticker with installed dated or replace by date. If changing the batteries doesn't stop the chirping it is most like time to replace the detector. If you check the manufacturer website they will give you a life expectancy for your detector.

Battery low,must change,Must check for battery power every 3 months.