There are 2 main mechanical parts to its lock the euro profile cylinder and the multi point locking system.
Upvc door lock sticking.
Checking the connection between the locking mechanism gearbox and the shoot bolts.
Guide the straw as far in as you can to make sure you re hitting every part of the locking mechanism that might be sticking with the wd 40.
Giving an insight into what to do with a faulty upvc door.
Upvc door won t lock when closed shut should your upvc door not lock when closed shut this is due to alignment and in most cases is easy to fix either by adjusting the lock strike keep or roller points or by adjusting the door hinges.
Freeing up or replacing the shootbolts and rollers.
Giving an insight into what to do with a faulty upvc door.
Repairing a jammed or stuck upvc window.
If you find your door is rattling when closed or if it isn t catching when being pushed shut it may be that you need to adjust the door latch.
The repair will usually involve either.
The key may not turn all the way in or will not turn the lock in some cases.
The replacement of the locking mechanism gearbox as lugs can break off within the gearbox.
A locksmith will usually just charge a labour price for this sort of job likely to be from 65 per hour.