This problem with the multi point locking system can develop over time until the lock suddenly stops working.
Problems with 3 point lock doors.
Last night however dh did something that ended up with the active handle in the up position which has rendered the door completely locked we cannot open it even though we can turn the deadbolt.
Locks come in a variety of styles options and finishes but generally fall into three categories.
Trouble turning the key if you have trouble turning the key in your door or the key is stuck then it could indicate that the locking system has completely failed.
All doors have some sort of latching mechanism to hold the door tight against the weather strip for a good seal and a lock to provide security.
I thought maybe there was a type of contact sensor available that could be triggered some how when the claw on the three point lock system were engaged.
Over time the sheer weight of the door on its hinges can cause it to come out of alignment and when this happens it can become difficult to activate the multipoint locking mechanism and the door will no longer close or lock properly.
Cylindrical mortise and multi point.
At this point it is advisable to contact a local locksmith who specialises in upvc door repair so they can adjust your upvc door.
Furthermore having a loose door lock in place can potentially be a fire hazard when it is being used as a fire door lock.