A Guide to uPVC Door and Lock Failures
                     The Essential Guide to 
uPVC Door & Lock Failures
Understanding common problems with UPVC doors and how to 
keep your property secure with expert maintenance from 
KLS Locks
Why uPVC Doors Need Special Attention
The Complexity Challenge
Unlike traditional mortice locks that can last decades with 
minimal maintenance, uPVC doors rely on sophisticated 
multipoint locking systems. These mechanisms engage 
multiple bolts simultaneously, creating secure closure at 
several points along the door frame.
However, this complexity comes at a cost: more moving 
parts mean more potential failure points, and many 
multipoint locks begin showing signs of wear within 5-10 
years.
Common uPVC Door Problems
Dropped Doors Key Spinning Failed Gearbox
Over time, door hinges can When you turn the key but The gearbox is the heart of the 
sag under the weight of the nothing happens, the internal multipoint system. When it 
door, causing misalignment. cam or gearbox has likely fails, bolts won't extend or 
This prevents proper failed. This frustrating issue retract properly, compromising 
engagement of the locking often strikes without warning, security. Grinding noises or 
mechanism and creates leaving you locked out or stiff operation are early 
draughts. unable to secure your warning signs.
property.
Warning Signs Your Lock Needs 
Attention
01
Difficulty turning the key
Increased resistance when locking or unlocking
02
Unusual sounds
Grinding, clicking, or scraping noises during operation
03
Door misalignment
Visible gaps or difficulty closing the door properly
04
Handle feels loose
Excessive movement or wobbling in the door handle
Repair or Replace? Making the Right Decision
When Simple Adjustment Works When Full Replacement Is Usually 
Necessary
• Minor door drop (less than 5mm misalignment)
• Hinge adjustments needed • Broken gearbox or internal mechanism
• Strike plate realignment • Snapped key in the lock cylinder
• Basic lubrication and maintenance • Severe door drop requiring new hinges
• Obsolete lock parts no longer available
A qualified locksmith can assess your situation within minutes and recommend the most cost-effective 
solution for your specific circumstances.
Why Choose KLS Locks?
Rapid Response Times Extensive Stock 
Emergency callouts available KLS Locks maintains a large 
24/7 across the region. Most inventory of uPVC door and 
non-emergency repairs other lock parts. This means 
completed within 24-48 hours of fewer delays and faster repairs 
initial contact, minimising for customers.
security risks and 
inconvenience.
Trusted Reputation MLA Approved & Trading 
Standards Checked
A trusted locksmith approved by 
major insurance companies and KLS Locks is 
contracted by local shopping Master Locksmith Association Ap
centres for ongoing proved
maintenance. Their work meets  and 
British Standards and comes Bromley Trading Standards Chec
with comprehensive guarantees. ked
Contract Services: Peace of Mind Guaranteed
What's Included
KLS Locks offers comprehensive contract services tailored to 
residential properties, landlords with multiple units, and 
commercial premises.
24/7  locksmith services for repairs and emergencies
• End of tenancy lock changes
• UPVC door and window repairs
• Securing empty properties
• Proactive replacement recommendations before failures occur
Customer Testimonials
"Our shopping centre has used KLS Locks for three years. Their 
response times are excellent, and they've prevented several 
potential security issues through their proactive maintenance 
programme."
— Facilities Manager, Local Shopping Centre
"The UPVC conservatory door was jammed and was unable to 
have it opened on both sides of the door. Barry quickly 
identified the problem and have the spare parts in hand.Barry 
replaced the broken parts in minutes and the door is now 
working perfectly."
— Residential Customer
Take Action Today
Don't Wait for a Lock Failure
Whether you're experiencing problems now or want to 
prevent future issues, KLS Locks offers free consultations to 
assess your property's security needs.
Contact KLS Locks to discuss:
• One-off repairs and adjustments
• Contract services
• Property security assessments
• Emergency lockout services