Why is my Arm-A-Door is not arming when I push on it? February 12, 2026 20:28 Updated Catalog FAQs Why is my Arm-A-Door is not arming when I push on it? Answer Possible Causes No power is reaching the unit. The unit is not engaging the arm function. The subassembly is damaged or failed. Solutions Verify power is present. Install fresh 9-volt batteries and reset the unit. Confirm the key cylinder engages the microswitch and that the microswitch functions properly. Replace the subassembly if it is defective. Applies To ARM-A-DOR Related to Arm-A-Dor Related articles How do I reset my Arm-A-Door unit? Why is my Arm-A-Door is not arming when I turn the key ? ARM-A-Dor Installation Instructions ARM A DOR FAQ's How to remove the push bar?