Yale error codes, explained

Assure and Nest x Yale keypad locks. Codes below: Battery and recovery guides. Each guide covers what the code means, what you can safely try yourself, when to stop and call a technician, and what the repair typically costs.

Yale keypad dead? The 9V battery trick on the bottom

Official and wonderful: most Yale Assure keypads (including Nest x Yale) have two emergency contacts on the BOTTOM edge of the keypad. Hold a fresh 9V battery against them and the lock wakes up long enough to enter your code — which matters enormously on Yale's key-free models, where there is no cylinder to fall back on. Low battery warnings come first (keypad indicator and app alerts); this is the documented recovery when they were ignored.

DIY fix — no technician needed