• Make sure the door is in automatic mode.
• Make sure the SmartKey has been set up to be recognized by the door.
• Make sure that only one key was programmed at a time if you are using multiple keys with the door.
• Turn the range knob up as far as possible clockwise.
• Make sure the SmartKey contains the correct battery (an RFA-67) and that it is fully charged.
• Make sure the batteries in the SmartDoor are fresh and properly installed.
• Take the key out of range for more than 10 seconds, and retry.

If the condition persists, check that there are no radio-frequency transmitting devices or electronic devices that radiate electrical energy, which may interfere with the operation of the electronic SmartDoor.