August Lock: Tailpiece Too Short – Fix Guide - Smart Home | digitalhomefaults.org

Technical Background:

The August Lock uses a tailpiece to connect the motor drive to the existing deadbolt. The tailpiece length is critical for proper engagement. A too-short tailpiece prevents the motor from fully actuating the deadbolt. RF communication (Z-Wave or Wi-Fi) is irrelevant in this case; the fault is mechanical.

Symptoms:

Lock fails to engage or disengage fully. The August app may show an error like 'Motor Overload' or 'Lock Jammed'. Manual operation is difficult or impossible. Visual inspection shows the tailpiece not properly connecting the lock mechanism to the adapter.

Possible Causes:

Incorrect tailpiece length for the specific deadbolt model.
Tailpiece was shortened during a previous system attempt.
Adapter installed incorrectly, creating a gap between the lock and deadbolt.
Door frame warping due to seasonal temperature changes in Canada affecting deadbolt alignment.
Stripped or damaged tailpiece threads preventing secure connection.
Lock cylinder shifted position relative to the door frame.

Solution:

1

Verify the deadbolt model and check the August compatibility list for the correct tailpiece length.
2

If the tailpiece was shortened, replace it with a new, appropriately sized tailpiece. Contact August support for replacement parts or purchase a compatible aftermarket option.
3

Ensure the adapter is flush against the deadbolt and securely fastened. Re-tighten screws.
4

Check door frame alignment. If warped, adjust strike plate position or shim behind the strike plate for proper alignment. A laser level can assist in this.
5

If the tailpiece threads are damaged, replace the tailpiece.
6

Loosen the screws holding the lock cylinder in place, reposition the cylinder, and retighten the screws. Make sure the cylinder freely rotates before reinstalling the August Lock.
7

Test lock operation in both manual and automated modes after each adjustment.

Safety Warning:

Ensure the door is unlocked and accessible from both sides before disassembling the lock. Avoid forcing any components during installation. Incorrect tailpiece installation can compromise security and leave the door vulnerable. Improper handling of tools may cause injuries.

Prevention:

Before installing the August Lock, carefully measure the deadbolt and door thickness to ensure proper tailpiece length selection. Inspect door frame alignment annually, especially after extreme temperature fluctuations. Periodically lubricate the deadbolt mechanism with a dry graphite lubricant.

Expert Tip:

Use calipers to precisely measure the required tailpiece length. Round up to the nearest available size and carefully file down if necessary, ensuring a clean, square end. Consider adding a small amount of thread locker (Loctite 242) to the tailpiece screw to prevent loosening over time.

Frequently Asked Questions

•What is the correct tailpiece length for my deadbolt?

Refer to the August compatibility list or measure the distance from the back of the deadbolt to the inside surface of the door, including the adapter.

•Where can I purchase a replacement tailpiece?

Contact August support or search online retailers for compatible tailpieces. Ensure the replacement is compatible with the August Lock model.

•How do I adjust my door frame to improve alignment?

Loosen strike plate screws and shift the strike plate to align with the deadbolt. Shim behind the strike plate if necessary. If the frame is severely warped, consult a professional door installer.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

Frequently Asked Questions

•What is the correct tailpiece length for my deadbolt?

•Where can I purchase a replacement tailpiece?

•How do I adjust my door frame to improve alignment?

Related Questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: