Smoke detectors typically beep every minute to signal that something is wrong. The most common reasons include:

1. Low Battery:
– The most frequent cause is a low or dying battery. When the battery power drops below a certain threshold, the smoke detector will emit a short beep or chirp every minute to alert you that it needs to be replaced.

2. End of Life Warning:
– Smoke detectors have a limited lifespan, usually around 7-10 years. If the detector is nearing the end of its operational life, it may start beeping to signal that it needs to be replaced.

3. Dust or Debris:
– Accumulated dust or debris inside the detector can interfere with its sensors, causing it to chirp as a warning. Cleaning the detector by gently vacuuming or using a compressed air canister can resolve this issue.

4. Environmental Factors:
– Changes in temperature, humidity, or the presence of strong chemicals (like cleaning agents) can sometimes cause the detector to beep. Ensuring that the detector is installed in an appropriate location, away from bathrooms or kitchens, can help.

5. Power Issues (For Hardwired Detectors):
– For detectors that are hardwired into your home’s electrical system, a loose connection or power disruption can cause them to beep. In such cases, resetting the detector or checking the wiring may be necessary.

If your smoke detector is beeping every minute, it’s essential to address the issue promptly to ensure your home’s safety.

Most Battery operated smoke detectors will use a common battery such as a 9V. If your home has hardwired smoke detectors please verify what style of back up battery it may have. 

Every model is different but fora majority of smoke detectors you will want to remove the front cover to access the battery. This can be done by simply twisting the housing in a counter clockwise direction and it will pop free from the plate screwed to the ceiling. Some detectors will have a screw securing them to the plate, if yours does not freely spin please verify it is not secured using a latch or screw.