To stop the false alarm, just wave your hand in front of the smoke detector or use a can of compressed air to blow the dust out of the detector. fourth, and most likely, the smoke detector is just sensing dust or something else in the air and is giving off a false alarm. The third is that the smoke detector may be past its expiration date and needs to be replaced. The second is that there may be a problem with the wiring or connection to the smoke detector. The first is that the battery may be low and needs to be replaced. There are a few reasons your smoke detector may be blinking red every 10 seconds. Why is my hardwired smoke detector blinking red every 10 seconds? If the wires look okay, try resetting the smoke detector. Check to see if the wires are loose or if there is any damage. If the battery is new and the smoke detector is still blinking red, there could be a problem with the wiring. The most common reason a smoke detector will blink red is because the battery needs to be replaced. How do I get my smoke detector to stop blinking red? If you have ruled out these possibilities, then you should contact the manufacturer of your smoke detector for further assistance. Another possibility is that there is something blocking the detector’s sensor, such as dust or insects. If you have a hardwired smoke detector, the blinking red light may indicate that the detector is not receiving enough power.