Fuhr 803 Overnight Door Mortice Repair Lock 45mm Backset 16mm Faceplate

Fuhr 803 Overnight Door Lock - 45mm Backset Emergency Replacement Mortice Lock for uPVC Doors

The genuine emergency locking solution when your multipoint lock fails and you need to secure your uPVC door overnight.

Fuhr 803 Overnight Door Lock provides a reliable temporary security solution when your main multipoint lock system fails. This genuine Fuhr emergency lock allows you to secure your uPVC or composite door using the lever handle and key operation while you arrange a permanent door lock repair or replacement, ensuring your property remains protected during the interim period.

Designed for 45mm backset uPVC doors with 92mm PZ centres, this overnight mortice lock features a 16mm narrow faceplate specifically engineered for emergency door lock installations and short-height door applications. The door lock system operates via lever-down action to retract the latch, whilst the deadbolt is independently controlled by the cylinder key—providing essential door security without the complexity of full multipoint lock mechanisms.

Key Benefits:

• Emergency Security Solution – When your multipoint door lock fails, this overnight lock provides immediate security, allowing you to lock your door safely while arranging permanent lock repairs without leaving your property vulnerable.
• Genuine Fuhr Component – Manufactured by Fuhr to exact specifications, ensuring reliable operation and proper compatibility with Fuhr 803 door lock systems, giving you confidence in quality and performance for your uPVC door.
• Dual Locking Action – The lever handle retracts the latch for everyday access, while the cylinder key independently operates the deadbolt for secure locking, providing straightforward operation for emergency door lock situations.
• Simple Lever-Down Operation – Unlike full multipoint systems, this mortice lock operates with a simple lever-down action, eliminating the need for lift-up handle operation and simplifying emergency use.
• Narrow 16mm Faceplate – The purpose-made slim faceplate accommodates door lock installations where space is limited, making it ideal for short doors, outhouse doors, and communal entrance applications.
• Adjustable Latch Handing – Easily modify the latch direction by removing a single Allen bolt, allowing you to configure the lock for either left or right-handed doors without specialist tools or locksmith assistance.
• Complete Assembly Supplied – Arrives with the centre gearbox pre-attached to the faceplate, ready for installation without additional components or assembly required.
• Versatile Application Range – While primarily an emergency lock solution, this door lock also serves as a permanent locking system for short-height doors, outhouse doors, and communal areas where full multipoint locks are unnecessary.

Product Specifications:

• Brand: Fuhr
• Model: 803 Overnight Door Lock
• Lock Type: Mortice Lock with Latch & Deadbolt
• Operation: Lever operates latch (Lever Down Only), Cylinder operates deadbolt
• Backset: 45mm
• PZ Centres: 92mm
• Faceplate Width: 16mm (Narrow Profile)
• Suitable For: Fuhr 803 Door Lock Range, uPVC Doors, Composite Doors
• Spindle Type: Single Spindle
• Spindle Diameter: 8mm
• Latch Handing: Adjustable (Reversible)
• Material: Metal Construction
• Product Status: Genuine Fuhr Part

Important Operation Note: This overnight mortice lock cannot be used as a centre case for full-length multipoint lock mechanisms as the follower does not operate in the standard manner. It is designed specifically as an overnight emergency lock or for short-door applications.

Dimensions:

• Overall Height: 292mm
• Mechanism Height: 200mm
• Overall Depth: 63mm
• Backset: 45mm (Centre of Spindle to Faceplate Edge)
• PZ Centres: 92mm (Spindle to Key Centre Distance)
• Latch to Deadbolt Centres: 97mm
• Faceplate Width: 16mm
• Deadbolt Width: 32mm
• Deadbolt Thickness: 6mm
• Deadbolt Throw: 20mm
• Weight: 600g

Pro Tips for Installation:

Pro Tip: To change the latch handing on your Fuhr overnight lock, push the latch inward until you see a small Allen bolt on the side of the case aligned with the latch. Simply unscrew this bolt to remove and reverse the latch—a straightforward adjustment that takes just minutes and requires only a basic Allen key. This makes the door lock adaptable for either left or right-handed door configurations without specialist knowledge or tools.

What's in the Pack:

• 1 × Fuhr 803 45mm Overnight Gearbox (Complete with Pre-Attached Faceplate)

Frequently Asked Questions:

Can this overnight lock be used as a permanent replacement for a full multipoint lock?

This Fuhr overnight lock is designed primarily as a temporary emergency solution when your main multipoint door lock fails. However, it can be used as a permanent door locking system for short-height doors, outhouse doors, and communal entrance doors where a full multipoint lock isn't necessary. The key limitation is that it cannot replace the centre case in a full-length multipoint mechanism because the follower operation differs from standard centre cases.

How does the lever operation differ from a standard multipoint lock?

This overnight mortice lock operates with a lever-down action to retract the latch for everyday access—you press the door handle down to open the door. The deadbolt is independently operated by the cylinder key for secure locking. Unlike full multipoint door lock systems, the handle does not lift upward to engage multiple locking points. This simplified operation makes it straightforward to use in emergency door lock situations, with the cylinder-operated deadbolt providing the primary security function.

Will this lock fit my existing Fuhr 803 door preparation?

Yes, provided your uPVC door has a 45mm backset and 92mm PZ centres, this overnight lock will fit the standard Fuhr 803 door preparation. The 16mm faceplate is designed to fit the mortice pocket prepared for Fuhr 803 door lock systems. Always verify your existing door measurements before ordering to ensure compatibility with your door lock.

Is this a genuine Fuhr part or an aftermarket alternative?

This is a genuine Fuhr manufactured component, not an aftermarket door lock substitute. You're receiving an authentic Fuhr 803 overnight lock made to the manufacturer's exact specifications, ensuring proper fit, reliable operation, and quality construction that meets Fuhr's engineering standards for door security.

What's the typical installation timeframe for this emergency lock?

For someone with basic DIY skills and the door already prepared for a Fuhr 803 lock system, installation typically takes 30-45 minutes. The overnight lock arrives with the gearbox pre-attached to the faceplate, which simplifies the door lock replacement process. You'll need to ensure correct alignment of the keep plates and adjust the latch handing if necessary, but the overall door lock installation is straightforward for emergency situations.

Why Choose the Fuhr 803 Overnight Lock?

When your multipoint door lock fails, you need a solution that provides immediate door security without compromise. This genuine Fuhr overnight lock delivers exactly that—a reliable, professionally engineered emergency locking system that keeps your property secure while you arrange permanent lock repairs. Whether you're dealing with a late-night door lock failure or need a dependable solution for a short-height door, this mortice lock combines Fuhr's renowned manufacturing quality with practical functionality. The straightforward lever-down operation eliminates complexity during stressful door lock situations, while the genuine Fuhr construction ensures you're not compromising on security when you need it most. For property owners, letting agents, and maintenance professionals who understand that door security cannot wait, the Fuhr 803 Overnight Lock is the trusted emergency lock solution for uPVC and composite doors.