Ask for the identified lock fault, the compatible replacement assembly and an explanation of how powered operation will remain protected from an engaged mechanical lock.
Identify the hardware that holds the door
This scope concerns a keyed handle, cylinder, connected lock bars or an interior slide lock. Describe what changed during ordinary use. Existing paperwork and photographs taken from a safe standing position can help identify the assembly without operating it.
An exterior number pad belongs under keypad installation and replacement; handheld or vehicle transmitters belong under remote replacement and programming. Phone access belongs under smart garage-door setup. Those controls send commands; replacing one does not repair a mechanical lock.
Look beyond the cylinder before ordering parts
Ask the technician to assess the cylinder, handle connection, bars or latch, receiving points and mounting material. The proposal should distinguish an internal lock fault from a door-position or attachment problem. A new cylinder alone cannot correct a distorted section.
Clopay's #3 Lock Bar instructions specify different hardware arrangements for steel sandwich, single-skin steel and wood doors, including thickness-dependent parts. Handle appearance alone cannot establish compatibility. Request the proposed part identification and the manufacturer's basis for using it on the retained door.
Resolve the powered-opener conflict explicitly
Clopay warns that its manual lock must be unlocked during powered operation to avoid door damage. Tell the provider if an opener was added after the lock, or if someone recently changed the locking arrangement. The technician should determine the permitted configuration from both manufacturers' instructions.
An automatic lock controlled by an opener is separate equipment. For example, the Overhead Door Infinity 2000 manual documents a door-lock connection and an optional external interlock. An interlock can inhibit operation under a specified condition; it is not a universal accessory for every opener. Ask whether one is required and supported for your equipment. Assessment, wiring and verification belong to the qualified provider; no interlock should be bypassed to restore movement.
Specify the repair and the handover
Have the written scope identify repair versus replacement, damaged mounting areas, supplied hardware and how existing keys will be handled. For a shared garage, confirm who may authorize changes and receive keys.
Request the final operating instructions and a record of applicable function and safety checks performed once the door is safe. DASMA assigns door repair and adjustment to trained technicians. Lock replacement does not guarantee resistance to entry or correct unrelated faults. Confirm exact-address coverage directly with the provider.
Questions before authorizing lock work
- Which inspected component is faulty, and are its attachment points sound?
- What makes the proposed lock assembly compatible with this door construction?
- How will the lock interact with the installed opener and any required interlock?
- Who authorizes the key change and receives the final operating instructions?
Common questions
Can any keyed garage-door handle replace the old one?
No. Door construction, thickness, mounting arrangement and the connected locking mechanism must match the proposed hardware. Ask for a part-specific compatibility explanation before replacement.
The opener strained while the door was locked. Is replacing the lock enough?
That cannot be established from the symptom. Stop operating the system and report the event. The technician should assess the lock, door and opener for resulting damage before proposing a repair.
Does adding a keypad repair or replace a manual lock?
No. A keypad is an access control for compatible equipment. A mechanical lock physically restrains the door, so its condition and interaction with powered operation need a separate assessment.
Read a little further.
Sources reviewed November 11, 2026. Follow the manual for your exact door and opener. These resources support general guidance, not a remote inspection.
- Clopay: #3 Lock Bar Assembly Instructions Manufacturer supplement distinguishes door constructions and thickness-dependent hardware; warns against powered operation with the manual lock engaged. Installation, drilling, restraint and release procedures are not reproduced.
- Overhead Door: Infinity 2000 residential wall-mount opener manual Manufacturer-hosted manual documents the model's automatic door lock and optional external interlock. Does not establish compatibility for another opener or authorize modifying existing protection.
- DASMA: TDS 175, Checking a Garage Door for Damage Guidance for trained door systems technicians supports checking door damage and professional repair or adjustment. Physical inspection and movement procedures are omitted.