Why can’t I program a new collar key for PlexiDor Electronic dog door?

If you find you cant program a new collar key for PlexiDor Dog Doors, it may be a simple answer. The most common issue with programming new keys for the PlexiDor Electronic is that too many keys are already in use. The circuit board can handle up to ten keys. If for instance a couple have been lost and need to be replaced, the 11th key will not be programmed.

The solution is to first delete all the collar keys and then re-program them.

If no key opens the pet door, not even the ones that were delivered with it, the antenna might not be connected. Read this article for help on troubleshooting the antenna.