Today I learned something! My lock was starting to get difficult to turn, so I broke out an old tube of graphite left over from my Pinewood Derby days. I lubed it up good, wiped up the mess and the lock turns smooth as new again. The next day I noticed the keypad was dead. After opening it back up I found that some graphite was clumped on the wire assembly and connector that connects the keypad to the inside half of the lock. That clump was causing a short. Another clean up and all is well. Graphite is a great conductor and that assembly is in the very bottom of the lock mechanism where it is perfectly situated to catch any loose debris.
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