Door gearbox replacement
The gearbox is the central operating case in many linked door-lock mechanisms.

Door gearbox replacement — align backset, spindle centres while faceplate type, with site access, working hours and protection requirements planned, with the property access and working requirements reviewed.
Confirm why it failed and whether the remaining strip and locking points are sound. A replacement case must match the system rather than just its general shape.
The detail that matters
Can the central case be replaced on its own?
Sometimes, where a compatible part exists and the rest of the assembly is suitable to retain.
Before the work
is agreed.
Can the central case be replaced on its own?
Sometimes, where a compatible part exists and the rest of the assembly is suitable to retain.
Why assess the door alignment as well?
Unresolved pressure or misalignment can continue to strain a new gearbox after replacement.
What should I include in this enquiry?
Have the postcode, photographs of the lock and door, and a short account of when the fault began. Identify the person authorised to arrange access; do not send key codes or sensitive entry credentials through the form.
Door gearbox replacement by area
Select a place to view this service for that location. Please provide the postcode when you enquire.