When the Schlage button blinks red even when no buttons have been pressed the battery is critically low and MUST be replaced.
Replacement instructions can be found in the following user guides.
BE and FE Model User Guide
When replacing the cover plate after changing batteries it is important that the screws are not overtightened. This can bend the back plate causing the battery connections to be warped and the batteries to drain very quickly.
Schlage recommends using a premium alkaline battery for all electronic locks. Lithium, rechargeable and older battery technologies may cause undesirable operation.
All Schlage smart and electronic locks are equipped with low battery warnings. When presented with this warning, it is best to replace your batteries immediately to ensure continued, reliable operation. When replacing the batteries, it is best to use new and unused alkaline batteries.
Let us know if you have any questions.
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