A Wilka number on the lock case does not necessarily identify the cylinder or key system. Before arranging a repair, distinguish the part receiving the key from the lock operating the bolts. This avoids ordering a cylinder for a fault elsewhere.
Wilka 1433 and 1438 are locks, not cylinder ranges
The Wilka metal-frame door lock brochure identifies 1433 and 1438 as mortise locks. These numbers do not establish the key profile or the requirements for ordering a spare.
On an already open door, record the markings on the forend, cylinder and installation documents separately. Do not dismantle a blocked door to find a number. Our cylinder and lock case guide explains the distinction.
Which situation describes your request?
- You need a spare key: identify the doors it opens and whether a security card or master-key-system manager exists. The lock number alone does not identify the key.
- The key resists or turns without opening: say whether the door is open or shut, whether the handle still operates and when the fault began. Stop forcing it; the symptom alone does not establish cylinder failure.
- The door closes but will not lock: mention rubbing and recent changes. Alignment, strike plate and mechanism need separate assessment; see door that will not lock.
Security cards and Wilka key orders
Requirements depend on the system. The SINUS Carat S3 documentation specifies a registration card and keys supplied through authorised retailers. Do not apply standard-key conditions to a protected profile.
For a shared entrance, contact the property or key-system manager before ordering. Provide the documents required by the relevant supplier; do not publish codes, cards or detailed photographs of key cuts. The official Wilka contact page directs private customers who need to locate a specialist retailer. An enquiry to Janssens does not establish authorisation to reproduce that profile.
What needs checking before replacement?
The manufacturer’s 1438 specification lists several backsets and forends. Parts from the same brand are therefore not automatically interchangeable.
- Lock case: full reference, backset, centres, forend, strike plate and door function.
- Cylinder: inside/outside dimensions, operation, door fittings and shared access to retain.
- Communal, fire or exit door: manufacturer requirements and the manager’s agreement before modification.
A certification applies to a reference and its configuration. Ask what is included and what is optional; the Wilka name alone does not certify the whole door. Measurements and availability are confirmed before ordering.
Prepare a visit in Brussels or your municipality
- Give the address, door type and whether the entrance can still be secured.
- Where possible without risky manipulation, prepare an overall door photograph and visible markings. Hide private information.
- Ask whether the quote covers opening, adjustment, the cylinder or the lock mechanism, including the total and surcharges before agreement.
- After repair, ask the technician to check the intended functions and keys with you. Keep the installed reference and future key-order requirements.
For maintenance, follow the model’s instructions and recommended product. Resistance does not justify a random lubricant or automatic replacement at a fixed age. Timing depends on the address, diagnosis and parts availability.
Describe the problem on 0495 205 400 · Prepare questions about the quote.
Manufacturer information checked on 3 October 2026. The links above lead to Wilka documents; compatibility with your door still needs checking.