At A.L.S. Locksmiths, I specialise in diagnosing and repairing faults with domestic uPVC and composite doors.

Rather than replacing parts unnecessarily, every repair starts with identifying the actual cause of the problem.

Services include:

• Door mechanism repairs.
• Gearbox replacement.
• Multipoint lock repairs.
• Door realignment.
• Hinge adjustment.
• Handle replacement.
• Snap-resistant lock upgrades.
• Jammed door repairs.
• Obsolete mechanism repairs.

Many repairs can be completed during a single visit using parts carried on the van.

Common Door Problems

I regularly repair doors with faults such as:

• Door won't lock.
• Door won't unlock.
• Handle won't lift.
• Drooping handles.
• Door only locks when lifted.
• Key turns but nothing happens.
• Key difficult to remove.
• Broken UPVC locking mechanisms repaired.
• Door rubbing on the frame.
• Door catching on the threshold.
• Grinding locking mechanism.
• French doors not locking together.
• Jammed doors that won't open.

Many of these symptoms are caused by alignment issues rather than complete lock failure.

Door Mechanism Repairs

Modern uPVC and composite doors use multipoint locking mechanisms containing:

• Gearboxes.
• Hooks.
• Rollers.
• Mushroom cams.
• Deadbolts.
• Latches.
• Shoot bolts.

Over time these parts wear.

Common repairs include:

• Gearbox replacement.
• Complete mechanism replacement.
• Hook repairs.
• Roller repairs.
• Mechanism servicing.
• Cleaning seized locking points.
• Replacing obsolete components.

Where possible, only the faulty part is replaced.

Door Alignment

Poor alignment is one of the biggest causes of gearbox failure.

If the locking points are continually forced against the frame keeps, extra pressure is placed on:

• The gearbox.
• Handles.
• Euro cylinder.
• Locking points.

Eventually something fails.

Correct alignment involves much more than adjusting a hinge.

Every repair includes checking:

• Door gaps.
• Hinges.
• Compression.
• Locking point engagement.
• Frame keeps.
• Handle operation.
• Weather seal.

The aim is for the door to close easily, lift smoothly and pull tightly against the weather seals.

Obsolete Door Mechanisms

Being told your mechanism is obsolete doesn't automatically mean you need a new door.

Many discontinued locking systems can still be repaired by:

• Replacing the gearbox.
• Adapting compatible mechanisms.
• Rebuilding sections of the original lock.
• Replacing individual locking points.

Over the years I've repaired many doors after customers had been advised to replace the entire door, saving them hundreds or even thousands of pounds.

Why Correct Diagnosis Matters

Many faults are misdiagnosed.

For example:

Replacing parts without diagnosing the fault often results in unnecessary expense.

Why Choose A.L.S. Locksmiths?

Every repair is approached with the same philosophy:

• Repair before replace.
• Correct diagnosis before fitting parts.
• Fixed prices.
• No Vat.
• No call-out charges.
• No hourly rates.
• Quality replacement parts.
• Correct door alignment after repairs.
• Honest advice if replacement really is necessary.

The goal isn't just to make the door work again—it's to ensure it operates smoothly and reliably for years to come.

Areas Covered

Door mechanism and alignment repairs are available throughout Paisley and the surrounding areas, including repairs to:

• uPVC front and back doors.
• Composite entrance doors.
• French doors.
• Some BI fold doors.
• Conservatory doors.

Conclusion

A stiff handle, jammed door or faulty locking mechanism doesn't usually mean you need a new door. Most uPVC and composite door faults can be traced to a failed gearbox, poor alignment, worn handles or a faulty multipoint locking mechanism. By accurately diagnosing the cause and repairing only the components that have failed, many doors can be restored to smooth, reliable operation while avoiding the unnecessary cost of replacement.

Need a Door Mechanism Repaired in Paisley?

If your uPVC or composite door has become difficult to lock, has jammed shut or simply doesn't feel right, A.L.S. Locksmiths specialises in repairing multipoint locking mechanisms and correctly realigning doors. Every repair begins with a thorough inspection to identify the real cause of the problem, ensuring only the necessary parts are replaced. To find out more about the service or arrange an appointment, visit the Door Mechanism & Alignment Repairs in Paisley page.