Do not attempt to force open the door.
Upvc door lock will not open.
Hi sounds like the centre mechanism has broken does the handle spin round.
This is very inportant because all parts of the mechanism are metal and if lubricant is not present your upvc door lock will wear out quicker than the manufacturers 10 year life expectancy.
Lubricating your upvc door mechanism.
This will only result in further damage to your door and leave your upvc door lock mechanism broken beyond repair.
However if your upvc door won t open then this makes replacing the locks quite tricky.
If it does then this is the problem if you are a keen diy er you can by all upvc locks on the internet for a centre piece its about 50 or the whole strap 100 if not call a window company they should charge about 120 plus parts to fix.
Pictured below are the lubrication points.
The only problem with replacing cylinder locks and replacing multipoint locks when the upvc door wont open is getting the upvc door open.
It can be quite a scary thought when your front or back doors stop locking correctly.
Broken upvc door lock mechanism.
A upvc door not opening when unlocked stays locked shut is one of the most common door lock problems that mla approved locksmiths come across multipoint locks are easy for our locksmiths to repair.
Now unless your a locksmith or a upvc lock specialist i strongly advise you don t attempt a diy approach as this will in almost all cases result in damage to your door ive attended many failed attempts of.